./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product63.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product63.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5 --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 7c7779f94f1738e754b88f9a8a8e36de7065a4e94578f4135106bd0ff9ddb13d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 18:58:51,251 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 18:58:51,333 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 18:58:51,339 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 18:58:51,340 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 18:58:51,368 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 18:58:51,369 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 18:58:51,369 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 18:58:51,370 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 18:58:51,371 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 18:58:51,371 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 18:58:51,372 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 18:58:51,373 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 18:58:51,373 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 18:58:51,374 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 18:58:51,374 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 18:58:51,375 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 18:58:51,376 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 18:58:51,376 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 18:58:51,377 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 18:58:51,377 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 18:58:51,378 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 18:58:51,379 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 18:58:51,379 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 18:58:51,380 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 18:58:51,380 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 18:58:51,381 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 18:58:51,381 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 18:58:51,381 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 18:58:51,382 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 18:58:51,382 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 18:58:51,383 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 18:58:51,383 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 18:58:51,383 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 18:58:51,384 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 18:58:51,384 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 18:58:51,385 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 18:58:51,385 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:58:51,385 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 18:58:51,386 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 18:58:51,386 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 18:58:51,386 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 18:58:51,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 18:58:51,387 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 18:58:51,387 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 18:58:51,387 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 18:58:51,387 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 18:58:51,388 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_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c7779f94f1738e754b88f9a8a8e36de7065a4e94578f4135106bd0ff9ddb13d [2023-11-21 18:58:51,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 18:58:51,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 18:58:51,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 18:58:51,744 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 18:58:51,745 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 18:58:51,746 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/product-lines/minepump_spec4_product63.cil.c [2023-11-21 18:58:54,856 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 18:58:55,108 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 18:58:55,108 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/sv-benchmarks/c/product-lines/minepump_spec4_product63.cil.c [2023-11-21 18:58:55,131 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/data/e12c9bc2e/f44b590834944182af11c4ec3b2211df/FLAG94998e777 [2023-11-21 18:58:55,150 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/data/e12c9bc2e/f44b590834944182af11c4ec3b2211df [2023-11-21 18:58:55,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 18:58:55,159 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 18:58:55,163 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 18:58:55,163 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 18:58:55,172 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 18:58:55,175 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:58:55" (1/1) ... [2023-11-21 18:58:55,176 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f74871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:55, skipping insertion in model container [2023-11-21 18:58:55,177 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:58:55" (1/1) ... [2023-11-21 18:58:55,250 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 18:58:55,599 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_1889bc20-2cac-494b-bb6a-df822c8a9e4a/sv-benchmarks/c/product-lines/minepump_spec4_product63.cil.c[15018,15031] [2023-11-21 18:58:55,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:58:55,661 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 18:58:55,673 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [49] [2023-11-21 18:58:55,676 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [415] [2023-11-21 18:58:55,676 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [519] [2023-11-21 18:58:55,676 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification4_spec.i","") [554] [2023-11-21 18:58:55,677 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [583] [2023-11-21 18:58:55,678 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [691] [2023-11-21 18:58:55,679 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [700] [2023-11-21 18:58:55,679 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [958] [2023-11-21 18:58:55,780 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_1889bc20-2cac-494b-bb6a-df822c8a9e4a/sv-benchmarks/c/product-lines/minepump_spec4_product63.cil.c[15018,15031] [2023-11-21 18:58:55,791 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:58:55,812 INFO L206 MainTranslator]: Completed translation [2023-11-21 18:58:55,813 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:55 WrapperNode [2023-11-21 18:58:55,813 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 18:58:55,814 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 18:58:55,815 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 18:58:55,815 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 18:58:55,823 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:55" (1/1) ... [2023-11-21 18:58:55,838 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:55" (1/1) ... [2023-11-21 18:58:55,871 INFO L138 Inliner]: procedures = 58, calls = 106, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 241 [2023-11-21 18:58:55,871 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 18:58:55,872 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 18:58:55,872 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 18:58:55,873 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 18:58:55,883 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:55" (1/1) ... [2023-11-21 18:58:55,883 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:55" (1/1) ... [2023-11-21 18:58:55,896 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:55" (1/1) ... [2023-11-21 18:58:55,897 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:55" (1/1) ... [2023-11-21 18:58:55,903 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:55" (1/1) ... [2023-11-21 18:58:55,908 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:55" (1/1) ... [2023-11-21 18:58:55,910 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:55" (1/1) ... [2023-11-21 18:58:55,912 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:55" (1/1) ... [2023-11-21 18:58:55,916 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 18:58:55,917 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 18:58:55,917 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 18:58:55,917 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 18:58:55,918 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:55" (1/1) ... [2023-11-21 18:58:55,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:58:55,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:58:55,963 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 18:58:55,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 18:58:56,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 18:58:56,006 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-21 18:58:56,006 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-21 18:58:56,007 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-21 18:58:56,007 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-21 18:58:56,007 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-21 18:58:56,007 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-21 18:58:56,008 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-21 18:58:56,008 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-21 18:58:56,008 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-21 18:58:56,008 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-21 18:58:56,009 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2023-11-21 18:58:56,009 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2023-11-21 18:58:56,009 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-11-21 18:58:56,009 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-11-21 18:58:56,010 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-21 18:58:56,010 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-21 18:58:56,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 18:58:56,010 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-21 18:58:56,011 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-21 18:58:56,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 18:58:56,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 18:58:56,127 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 18:58:56,130 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 18:58:56,438 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 18:58:56,562 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 18:58:56,562 INFO L308 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-21 18:58:56,564 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:58:56 BoogieIcfgContainer [2023-11-21 18:58:56,564 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 18:58:56,567 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 18:58:56,568 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 18:58:56,571 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 18:58:56,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 06:58:55" (1/3) ... [2023-11-21 18:58:56,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30c167b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:58:56, skipping insertion in model container [2023-11-21 18:58:56,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:55" (2/3) ... [2023-11-21 18:58:56,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30c167b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:58:56, skipping insertion in model container [2023-11-21 18:58:56,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:58:56" (3/3) ... [2023-11-21 18:58:56,575 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product63.cil.c [2023-11-21 18:58:56,596 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 18:58:56,596 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 18:58:56,652 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 18:58:56,659 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;@55c377c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 18:58:56,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 18:58:56,664 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) [2023-11-21 18:58:56,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-21 18:58:56,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:58:56,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:58:56,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:58:56,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:58:56,681 INFO L85 PathProgramCache]: Analyzing trace with hash -2033655671, now seen corresponding path program 1 times [2023-11-21 18:58:56,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:58:56,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853349152] [2023-11-21 18:58:56,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:58:56,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:58:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:58:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:58:56,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:58:56,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853349152] [2023-11-21 18:58:56,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853349152] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:58:56,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:58:56,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 18:58:56,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687818898] [2023-11-21 18:58:56,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:58:56,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-21 18:58:56,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:58:57,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-21 18:58:57,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 18:58:57,052 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) [2023-11-21 18:58:57,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:58:57,192 INFO L93 Difference]: Finished difference Result 144 states and 199 transitions. [2023-11-21 18:58:57,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-21 18:58:57,196 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 [2023-11-21 18:58:57,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:58:57,208 INFO L225 Difference]: With dead ends: 144 [2023-11-21 18:58:57,208 INFO L226 Difference]: Without dead ends: 68 [2023-11-21 18:58:57,213 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 [2023-11-21 18:58:57,217 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:58:57,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:58:57,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-21 18:58:57,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-11-21 18:58:57,268 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) [2023-11-21 18:58:57,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2023-11-21 18:58:57,273 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 12 [2023-11-21 18:58:57,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:58:57,273 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2023-11-21 18:58:57,274 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) [2023-11-21 18:58:57,274 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2023-11-21 18:58:57,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-21 18:58:57,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:58:57,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:58:57,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 18:58:57,277 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:58:57,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:58:57,278 INFO L85 PathProgramCache]: Analyzing trace with hash 627374081, now seen corresponding path program 1 times [2023-11-21 18:58:57,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:58:57,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426271762] [2023-11-21 18:58:57,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:58:57,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:58:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:58:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:58:57,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:58:57,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426271762] [2023-11-21 18:58:57,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426271762] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:58:57,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:58:57,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:58:57,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667557421] [2023-11-21 18:58:57,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:58:57,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:58:57,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:58:57,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:58:57,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:58:57,445 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) [2023-11-21 18:58:57,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:58:57,524 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2023-11-21 18:58:57,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:58:57,525 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 [2023-11-21 18:58:57,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:58:57,530 INFO L225 Difference]: With dead ends: 108 [2023-11-21 18:58:57,530 INFO L226 Difference]: Without dead ends: 60 [2023-11-21 18:58:57,536 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 [2023-11-21 18:58:57,539 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 14 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 18:58:57,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 111 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 18:58:57,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-21 18:58:57,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-21 18:58:57,562 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) [2023-11-21 18:58:57,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2023-11-21 18:58:57,566 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 13 [2023-11-21 18:58:57,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:58:57,567 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2023-11-21 18:58:57,568 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) [2023-11-21 18:58:57,569 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2023-11-21 18:58:57,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 18:58:57,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:58:57,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:58:57,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 18:58:57,572 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:58:57,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:58:57,575 INFO L85 PathProgramCache]: Analyzing trace with hash 2128038948, now seen corresponding path program 1 times [2023-11-21 18:58:57,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:58:57,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783793945] [2023-11-21 18:58:57,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:58:57,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:58:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:58:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:58:57,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:58:57,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783793945] [2023-11-21 18:58:57,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783793945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:58:57,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:58:57,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:58:57,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611949071] [2023-11-21 18:58:57,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:58:57,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:58:57,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:58:57,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:58:57,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:58:57,750 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), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:57,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:58:57,910 INFO L93 Difference]: Finished difference Result 161 states and 218 transitions. [2023-11-21 18:58:57,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:58:57,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-21 18:58:57,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:58:57,913 INFO L225 Difference]: With dead ends: 161 [2023-11-21 18:58:57,913 INFO L226 Difference]: Without dead ends: 103 [2023-11-21 18:58:57,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:58:57,915 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 92 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:58:57,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 144 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:58:57,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-21 18:58:57,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 86. [2023-11-21 18:58:57,932 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) [2023-11-21 18:58:57,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 113 transitions. [2023-11-21 18:58:57,934 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 113 transitions. Word has length 16 [2023-11-21 18:58:57,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:58:57,934 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 113 transitions. [2023-11-21 18:58:57,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:57,934 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 113 transitions. [2023-11-21 18:58:57,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 18:58:57,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:58:57,936 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:58:57,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 18:58:57,937 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:58:57,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:58:57,937 INFO L85 PathProgramCache]: Analyzing trace with hash 333125851, now seen corresponding path program 1 times [2023-11-21 18:58:57,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:58:57,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514675557] [2023-11-21 18:58:57,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:58:57,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:58:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:58:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:58:58,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:58:58,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514675557] [2023-11-21 18:58:58,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514675557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:58:58,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:58:58,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 18:58:58,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671151483] [2023-11-21 18:58:58,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:58:58,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 18:58:58,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:58:58,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 18:58:58,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:58:58,155 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) [2023-11-21 18:58:58,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:58:58,307 INFO L93 Difference]: Finished difference Result 261 states and 349 transitions. [2023-11-21 18:58:58,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 18:58:58,308 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 [2023-11-21 18:58:58,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:58:58,310 INFO L225 Difference]: With dead ends: 261 [2023-11-21 18:58:58,311 INFO L226 Difference]: Without dead ends: 177 [2023-11-21 18:58:58,312 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 [2023-11-21 18:58:58,313 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 89 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:58:58,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 205 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:58:58,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-21 18:58:58,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 168. [2023-11-21 18:58:58,341 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) [2023-11-21 18:58:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 212 transitions. [2023-11-21 18:58:58,343 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 212 transitions. Word has length 19 [2023-11-21 18:58:58,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:58:58,344 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 212 transitions. [2023-11-21 18:58:58,344 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) [2023-11-21 18:58:58,344 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 212 transitions. [2023-11-21 18:58:58,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-21 18:58:58,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:58:58,346 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] [2023-11-21 18:58:58,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 18:58:58,347 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:58:58,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:58:58,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1890710108, now seen corresponding path program 1 times [2023-11-21 18:58:58,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:58:58,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771685840] [2023-11-21 18:58:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:58:58,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:58:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:58:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:58:58,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:58:58,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771685840] [2023-11-21 18:58:58,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771685840] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:58:58,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:58:58,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 18:58:58,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629320824] [2023-11-21 18:58:58,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:58:58,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 18:58:58,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:58:58,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 18:58:58,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-21 18:58:58,590 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) [2023-11-21 18:58:59,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:58:59,127 INFO L93 Difference]: Finished difference Result 457 states and 600 transitions. [2023-11-21 18:58:59,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 18:58:59,128 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 [2023-11-21 18:58:59,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:58:59,132 INFO L225 Difference]: With dead ends: 457 [2023-11-21 18:58:59,132 INFO L226 Difference]: Without dead ends: 373 [2023-11-21 18:58:59,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-21 18:58:59,135 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 253 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 18:58:59,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 288 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 18:58:59,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2023-11-21 18:58:59,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 334. [2023-11-21 18:58:59,185 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) [2023-11-21 18:58:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 417 transitions. [2023-11-21 18:58:59,189 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 417 transitions. Word has length 22 [2023-11-21 18:58:59,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:58:59,189 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 417 transitions. [2023-11-21 18:58:59,189 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) [2023-11-21 18:58:59,190 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 417 transitions. [2023-11-21 18:58:59,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-21 18:58:59,193 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:58:59,194 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] [2023-11-21 18:58:59,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 18:58:59,194 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:58:59,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:58:59,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1996704669, now seen corresponding path program 1 times [2023-11-21 18:58:59,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:58:59,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011275939] [2023-11-21 18:58:59,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:58:59,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:58:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:58:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:58:59,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:58:59,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011275939] [2023-11-21 18:58:59,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011275939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:58:59,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:58:59,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-21 18:58:59,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177022465] [2023-11-21 18:58:59,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:58:59,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 18:58:59,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:58:59,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 18:58:59,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-21 18:58:59,615 INFO L87 Difference]: Start difference. First operand 334 states and 417 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) [2023-11-21 18:59:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:00,027 INFO L93 Difference]: Finished difference Result 506 states and 655 transitions. [2023-11-21 18:59:00,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 18:59:00,028 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 [2023-11-21 18:59:00,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:00,032 INFO L225 Difference]: With dead ends: 506 [2023-11-21 18:59:00,032 INFO L226 Difference]: Without dead ends: 335 [2023-11-21 18:59:00,034 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 [2023-11-21 18:59:00,035 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 143 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:00,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 165 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 18:59:00,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2023-11-21 18:59:00,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 276. [2023-11-21 18:59:00,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 189 states have (on average 1.3015873015873016) internal successors, (246), 214 states have internal predecessors, (246), 44 states have call successors, (44), 35 states have call predecessors, (44), 42 states have return successors, (60), 42 states have call predecessors, (60), 44 states have call successors, (60) [2023-11-21 18:59:00,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 350 transitions. [2023-11-21 18:59:00,083 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 350 transitions. Word has length 53 [2023-11-21 18:59:00,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:00,084 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 350 transitions. [2023-11-21 18:59:00,084 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) [2023-11-21 18:59:00,084 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 350 transitions. [2023-11-21 18:59:00,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-21 18:59:00,088 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:00,089 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] [2023-11-21 18:59:00,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 18:59:00,089 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:00,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:00,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1411634325, now seen corresponding path program 1 times [2023-11-21 18:59:00,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:00,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383349272] [2023-11-21 18:59:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:00,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:00,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 18:59:00,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:00,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383349272] [2023-11-21 18:59:00,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383349272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:00,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:00,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 18:59:00,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085863518] [2023-11-21 18:59:00,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:00,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 18:59:00,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:00,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 18:59:00,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 18:59:00,245 INFO L87 Difference]: Start difference. First operand 276 states and 350 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) [2023-11-21 18:59:00,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:00,439 INFO L93 Difference]: Finished difference Result 662 states and 856 transitions. [2023-11-21 18:59:00,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 18:59:00,440 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 [2023-11-21 18:59:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:00,447 INFO L225 Difference]: With dead ends: 662 [2023-11-21 18:59:00,447 INFO L226 Difference]: Without dead ends: 548 [2023-11-21 18:59:00,448 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 [2023-11-21 18:59:00,452 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 56 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:00,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 279 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:00,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-11-21 18:59:00,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 522. [2023-11-21 18:59:00,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 367 states have (on average 1.3051771117166213) internal successors, (479), 406 states have internal predecessors, (479), 78 states have call successors, (78), 62 states have call predecessors, (78), 76 states have return successors, (110), 76 states have call predecessors, (110), 78 states have call successors, (110) [2023-11-21 18:59:00,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 667 transitions. [2023-11-21 18:59:00,598 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 667 transitions. Word has length 60 [2023-11-21 18:59:00,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:00,599 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 667 transitions. [2023-11-21 18:59:00,599 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) [2023-11-21 18:59:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 667 transitions. [2023-11-21 18:59:00,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-21 18:59:00,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:00,605 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:00,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 18:59:00,606 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:00,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:00,607 INFO L85 PathProgramCache]: Analyzing trace with hash -356658417, now seen corresponding path program 1 times [2023-11-21 18:59:00,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:00,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875357878] [2023-11-21 18:59:00,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:00,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:00,670 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 18:59:00,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:00,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875357878] [2023-11-21 18:59:00,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875357878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:00,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:00,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 18:59:00,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800199189] [2023-11-21 18:59:00,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:00,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:59:00,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:00,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:59:00,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:00,675 INFO L87 Difference]: Start difference. First operand 522 states and 667 transitions. Second operand has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 18:59:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:00,878 INFO L93 Difference]: Finished difference Result 1062 states and 1353 transitions. [2023-11-21 18:59:00,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:59:00,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 64 [2023-11-21 18:59:00,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:00,883 INFO L225 Difference]: With dead ends: 1062 [2023-11-21 18:59:00,883 INFO L226 Difference]: Without dead ends: 446 [2023-11-21 18:59:00,885 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 [2023-11-21 18:59:00,886 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 103 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:00,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 138 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:00,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-11-21 18:59:00,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 367. [2023-11-21 18:59:00,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 251 states have (on average 1.254980079681275) internal successors, (315), 277 states have internal predecessors, (315), 56 states have call successors, (56), 47 states have call predecessors, (56), 59 states have return successors, (72), 57 states have call predecessors, (72), 56 states have call successors, (72) [2023-11-21 18:59:00,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 443 transitions. [2023-11-21 18:59:00,939 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 443 transitions. Word has length 64 [2023-11-21 18:59:00,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:00,939 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 443 transitions. [2023-11-21 18:59:00,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 18:59:00,940 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 443 transitions. [2023-11-21 18:59:00,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-21 18:59:00,942 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:00,942 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] [2023-11-21 18:59:00,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 18:59:00,943 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:00,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:00,943 INFO L85 PathProgramCache]: Analyzing trace with hash 821402790, now seen corresponding path program 1 times [2023-11-21 18:59:00,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:00,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879107373] [2023-11-21 18:59:00,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:00,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 18:59:01,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:01,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879107373] [2023-11-21 18:59:01,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879107373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:01,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640308513] [2023-11-21 18:59:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:01,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:01,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:01,146 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:01,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 18:59:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:01,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-21 18:59:01,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:01,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 18:59:02,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640308513] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:02,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1924091352] [2023-11-21 18:59:02,338 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2023-11-21 18:59:02,338 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:59:02,342 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:59:02,348 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:59:02,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:59:05,986 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 138 for LOIs [2023-11-21 18:59:06,120 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 19 for LOIs [2023-11-21 18:59:06,236 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 19 for LOIs [2023-11-21 18:59:06,284 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 19 for LOIs [2023-11-21 18:59:06,387 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 20 for LOIs [2023-11-21 18:59:06,391 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:59:09,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1924091352] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:09,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-21 18:59:09,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [8, 11, 10] total 53 [2023-11-21 18:59:09,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264335705] [2023-11-21 18:59:09,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:09,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-21 18:59:09,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:09,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-21 18:59:09,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=2421, Unknown=0, NotChecked=0, Total=2756 [2023-11-21 18:59:09,731 INFO L87 Difference]: Start difference. First operand 367 states and 443 transitions. Second operand has 30 states, 23 states have (on average 1.434782608695652) internal successors, (33), 25 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 18:59:18,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:18,478 INFO L93 Difference]: Finished difference Result 1187 states and 1591 transitions. [2023-11-21 18:59:18,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-21 18:59:18,479 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 23 states have (on average 1.434782608695652) internal successors, (33), 25 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 61 [2023-11-21 18:59:18,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:18,486 INFO L225 Difference]: With dead ends: 1187 [2023-11-21 18:59:18,486 INFO L226 Difference]: Without dead ends: 887 [2023-11-21 18:59:18,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2756 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1378, Invalid=8722, Unknown=0, NotChecked=0, Total=10100 [2023-11-21 18:59:18,493 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 463 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 1836 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 1836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:18,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 458 Invalid, 2189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 1836 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-21 18:59:18,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2023-11-21 18:59:18,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 538. [2023-11-21 18:59:18,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 362 states have (on average 1.2541436464088398) internal successors, (454), 395 states have internal predecessors, (454), 87 states have call successors, (87), 76 states have call predecessors, (87), 88 states have return successors, (118), 83 states have call predecessors, (118), 87 states have call successors, (118) [2023-11-21 18:59:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 659 transitions. [2023-11-21 18:59:18,596 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 659 transitions. Word has length 61 [2023-11-21 18:59:18,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:18,597 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 659 transitions. [2023-11-21 18:59:18,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 23 states have (on average 1.434782608695652) internal successors, (33), 25 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 18:59:18,597 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 659 transitions. [2023-11-21 18:59:18,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-21 18:59:18,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:18,600 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:18,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:18,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:18,821 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:18,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:18,822 INFO L85 PathProgramCache]: Analyzing trace with hash 683161800, now seen corresponding path program 1 times [2023-11-21 18:59:18,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:18,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422729470] [2023-11-21 18:59:18,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:18,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:59:19,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:19,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422729470] [2023-11-21 18:59:19,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422729470] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:19,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973608612] [2023-11-21 18:59:19,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:19,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:19,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:19,440 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:19,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 18:59:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:19,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-21 18:59:19,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:19,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 18:59:20,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973608612] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:20,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1537262445] [2023-11-21 18:59:20,205 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-11-21 18:59:20,206 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:59:20,206 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:59:20,207 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:59:20,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:59:23,606 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 21 for LOIs [2023-11-21 18:59:23,612 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 20 for LOIs [2023-11-21 18:59:23,896 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 21 for LOIs [2023-11-21 18:59:23,934 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 21 for LOIs [2023-11-21 18:59:24,022 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 26 for LOIs [2023-11-21 18:59:24,033 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 16 for LOIs [2023-11-21 18:59:24,037 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 44 for LOIs [2023-11-21 18:59:24,065 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:59:27,549 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10289#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483647) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483648)) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~4#1| 0) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (<= 0 ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (<= ~methaneLevelCritical~0 2147483647) (= ~waterLevel~0 0))' at error location [2023-11-21 18:59:27,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 18:59:27,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 18:59:27,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 10] total 29 [2023-11-21 18:59:27,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223695658] [2023-11-21 18:59:27,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 18:59:27,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-21 18:59:27,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:27,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-21 18:59:27,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=3749, Unknown=0, NotChecked=0, Total=4160 [2023-11-21 18:59:27,555 INFO L87 Difference]: Start difference. First operand 538 states and 659 transitions. Second operand has 29 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 11 states have call successors, (20), 10 states have call predecessors, (20), 11 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2023-11-21 18:59:36,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:36,983 INFO L93 Difference]: Finished difference Result 3884 states and 5683 transitions. [2023-11-21 18:59:36,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2023-11-21 18:59:36,983 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 11 states have call successors, (20), 10 states have call predecessors, (20), 11 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) Word has length 63 [2023-11-21 18:59:36,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:37,006 INFO L225 Difference]: With dead ends: 3884 [2023-11-21 18:59:37,007 INFO L226 Difference]: Without dead ends: 3545 [2023-11-21 18:59:37,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 164 SyntacticMatches, 6 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21005 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=6389, Invalid=44913, Unknown=0, NotChecked=0, Total=51302 [2023-11-21 18:59:37,022 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 1567 mSDsluCounter, 1485 mSDsCounter, 0 mSdLazyCounter, 2926 mSolverCounterSat, 1172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1573 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 4098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1172 IncrementalHoareTripleChecker+Valid, 2926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:37,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1573 Valid, 1638 Invalid, 4098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1172 Valid, 2926 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-21 18:59:37,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3545 states. [2023-11-21 18:59:37,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3545 to 2880. [2023-11-21 18:59:37,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2880 states, 2050 states have (on average 1.2775609756097561) internal successors, (2619), 2170 states have internal predecessors, (2619), 377 states have call successors, (377), 308 states have call predecessors, (377), 452 states have return successors, (940), 470 states have call predecessors, (940), 377 states have call successors, (940) [2023-11-21 18:59:37,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 3936 transitions. [2023-11-21 18:59:37,421 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 3936 transitions. Word has length 63 [2023-11-21 18:59:37,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:37,421 INFO L495 AbstractCegarLoop]: Abstraction has 2880 states and 3936 transitions. [2023-11-21 18:59:37,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 11 states have call successors, (20), 10 states have call predecessors, (20), 11 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2023-11-21 18:59:37,422 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 3936 transitions. [2023-11-21 18:59:37,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-21 18:59:37,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:37,426 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] [2023-11-21 18:59:37,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:37,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-21 18:59:37,646 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:37,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:37,647 INFO L85 PathProgramCache]: Analyzing trace with hash 160782990, now seen corresponding path program 1 times [2023-11-21 18:59:37,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:37,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106735478] [2023-11-21 18:59:37,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:37,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 18:59:38,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:38,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106735478] [2023-11-21 18:59:38,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106735478] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:38,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514760326] [2023-11-21 18:59:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:38,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:38,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:38,650 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:38,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1889bc20-2cac-494b-bb6a-df822c8a9e4a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 18:59:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:38,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 18:59:38,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-21 18:59:38,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:38,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514760326] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:38,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 18:59:38,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [21] total 22 [2023-11-21 18:59:38,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582794189] [2023-11-21 18:59:38,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:38,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:59:38,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:38,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:59:38,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2023-11-21 18:59:38,800 INFO L87 Difference]: Start difference. First operand 2880 states and 3936 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)