./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --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 7abfb9176afcd07735578408e79f372120c27df81ffb5983e2784997c7f45a43 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:58:33,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:58:33,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:58:33,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:58:33,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:58:33,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:58:33,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:58:33,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:58:33,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:58:33,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:58:33,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:58:33,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:58:33,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:58:33,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:58:33,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:58:33,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:58:33,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:58:33,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:58:33,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:58:33,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:58:33,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:58:33,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:58:33,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:58:33,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:58:33,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:58:33,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:58:33,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:58:33,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:58:33,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:58:33,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:58:33,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:58:33,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:58:33,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:58:33,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:58:33,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:58:33,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:58:33,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:58:33,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:58:33,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:58:33,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:58:33,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:58:33,880 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:58:33,924 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:58:33,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:58:33,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:58:33,925 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:58:33,932 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:58:33,933 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:58:33,933 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:58:33,933 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:58:33,933 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:58:33,934 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:58:33,935 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:58:33,935 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:58:33,935 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:58:33,935 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:58:33,936 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:58:33,936 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:58:33,936 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:58:33,936 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:58:33,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:58:33,938 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:58:33,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:58:33,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:58:33,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:58:33,939 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:58:33,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:58:33,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:58:33,941 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:58:33,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:58:33,941 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:58:33,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:58:33,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:58:33,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:58:33,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:58:33,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:58:33,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:58:33,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:58:33,944 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:58:33,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:58:33,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:58:33,944 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:58:33,944 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:58:33,945 INFO L138 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_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7abfb9176afcd07735578408e79f372120c27df81ffb5983e2784997c7f45a43 [2021-11-25 19:58:34,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:58:34,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:58:34,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:58:34,303 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:58:34,303 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:58:34,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c [2021-11-25 19:58:34,373 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/data/70d779b6d/e75615192ceb4c11932e8909f6115730/FLAG9b9e6f407 [2021-11-25 19:58:35,085 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:58:35,086 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c [2021-11-25 19:58:35,125 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/data/70d779b6d/e75615192ceb4c11932e8909f6115730/FLAG9b9e6f407 [2021-11-25 19:58:35,262 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/data/70d779b6d/e75615192ceb4c11932e8909f6115730 [2021-11-25 19:58:35,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:58:35,265 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:58:35,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:58:35,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:58:35,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:58:35,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:58:35" (1/1) ... [2021-11-25 19:58:35,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ffc64bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:35, skipping insertion in model container [2021-11-25 19:58:35,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:58:35" (1/1) ... [2021-11-25 19:58:35,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:58:35,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:58:35,709 WARN L230 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_704d0a24-cacd-449e-9c7f-d33c60f2067f/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c[16494,16507] [2021-11-25 19:58:35,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:58:35,998 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:58:36,069 WARN L230 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_704d0a24-cacd-449e-9c7f-d33c60f2067f/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c[16494,16507] [2021-11-25 19:58:36,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:58:36,225 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:58:36,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:36 WrapperNode [2021-11-25 19:58:36,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:58:36,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:58:36,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:58:36,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:58:36,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:36" (1/1) ... [2021-11-25 19:58:36,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:36" (1/1) ... [2021-11-25 19:58:36,423 INFO L137 Inliner]: procedures = 95, calls = 342, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 1163 [2021-11-25 19:58:36,423 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:58:36,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:58:36,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:58:36,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:58:36,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:36" (1/1) ... [2021-11-25 19:58:36,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:36" (1/1) ... [2021-11-25 19:58:36,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:36" (1/1) ... [2021-11-25 19:58:36,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:36" (1/1) ... [2021-11-25 19:58:36,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:36" (1/1) ... [2021-11-25 19:58:36,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:36" (1/1) ... [2021-11-25 19:58:36,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:36" (1/1) ... [2021-11-25 19:58:36,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:58:36,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:58:36,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:58:36,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:58:36,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:36" (1/1) ... [2021-11-25 19:58:36,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:58:36,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:58:36,572 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:58:36,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:58:36,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:58:36,618 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 19:58:36,619 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 19:58:36,619 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-25 19:58:36,619 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-25 19:58:36,619 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 19:58:36,619 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 19:58:36,619 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-25 19:58:36,620 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-25 19:58:36,620 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 19:58:36,620 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 19:58:36,620 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 19:58:36,620 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 19:58:36,620 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 19:58:36,620 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 19:58:36,621 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 19:58:36,621 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 19:58:36,621 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-25 19:58:36,621 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-25 19:58:36,621 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-25 19:58:36,621 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-25 19:58:36,621 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 19:58:36,622 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 19:58:36,622 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 19:58:36,622 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 19:58:36,622 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 19:58:36,622 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 19:58:36,622 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-25 19:58:36,622 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-25 19:58:36,623 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 19:58:36,623 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 19:58:36,623 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-25 19:58:36,623 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-25 19:58:36,623 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 19:58:36,624 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 19:58:36,624 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 19:58:36,624 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 19:58:36,624 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 19:58:36,624 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 19:58:36,624 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 19:58:36,625 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 19:58:36,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:58:36,625 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 19:58:36,625 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 19:58:36,626 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 19:58:36,626 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 19:58:36,626 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 19:58:36,627 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 19:58:36,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:58:36,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:58:36,628 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 19:58:36,628 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 19:58:36,822 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:58:36,824 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:58:38,078 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:58:38,816 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:58:38,816 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:58:38,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:58:38 BoogieIcfgContainer [2021-11-25 19:58:38,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:58:38,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:58:38,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:58:38,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:58:38,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:58:35" (1/3) ... [2021-11-25 19:58:38,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ddd61d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:58:38, skipping insertion in model container [2021-11-25 19:58:38,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:36" (2/3) ... [2021-11-25 19:58:38,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ddd61d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:58:38, skipping insertion in model container [2021-11-25 19:58:38,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:58:38" (3/3) ... [2021-11-25 19:58:38,832 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product27.cil.c [2021-11-25 19:58:38,838 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:58:38,838 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:58:38,907 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:58:38,914 INFO L339 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=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:58:38,914 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:58:38,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 374 states, 252 states have (on average 1.5952380952380953) internal successors, (402), 273 states have internal predecessors, (402), 96 states have call successors, (96), 24 states have call predecessors, (96), 24 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-25 19:58:38,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 19:58:38,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:38,968 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:38,968 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:38,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:38,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1480112312, now seen corresponding path program 1 times [2021-11-25 19:58:38,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:38,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547777913] [2021-11-25 19:58:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:38,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:58:39,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:39,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547777913] [2021-11-25 19:58:39,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547777913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:39,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:39,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:58:39,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166992932] [2021-11-25 19:58:39,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:39,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 19:58:39,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:39,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 19:58:39,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:58:39,515 INFO L87 Difference]: Start difference. First operand has 374 states, 252 states have (on average 1.5952380952380953) internal successors, (402), 273 states have internal predecessors, (402), 96 states have call successors, (96), 24 states have call predecessors, (96), 24 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-25 19:58:39,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:39,716 INFO L93 Difference]: Finished difference Result 392 states and 621 transitions. [2021-11-25 19:58:39,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 19:58:39,719 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 77 [2021-11-25 19:58:39,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:39,748 INFO L225 Difference]: With dead ends: 392 [2021-11-25 19:58:39,749 INFO L226 Difference]: Without dead ends: 370 [2021-11-25 19:58:39,753 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:58:39,759 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:39,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 551 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:58:39,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-25 19:58:39,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2021-11-25 19:58:39,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 250 states have (on average 1.584) internal successors, (396), 269 states have internal predecessors, (396), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-25 19:58:39,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 583 transitions. [2021-11-25 19:58:39,897 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 583 transitions. Word has length 77 [2021-11-25 19:58:39,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:39,902 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 583 transitions. [2021-11-25 19:58:39,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-25 19:58:39,903 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 583 transitions. [2021-11-25 19:58:39,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-25 19:58:39,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:39,924 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:39,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:58:39,925 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:39,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:39,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1055453662, now seen corresponding path program 1 times [2021-11-25 19:58:39,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:39,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509651950] [2021-11-25 19:58:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:39,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:58:40,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:40,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509651950] [2021-11-25 19:58:40,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509651950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:40,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:40,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:58:40,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967185367] [2021-11-25 19:58:40,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:40,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:58:40,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:40,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:58:40,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:58:40,235 INFO L87 Difference]: Start difference. First operand 370 states and 583 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-25 19:58:42,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:42,487 INFO L93 Difference]: Finished difference Result 1141 states and 1828 transitions. [2021-11-25 19:58:42,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:58:42,488 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 78 [2021-11-25 19:58:42,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:42,496 INFO L225 Difference]: With dead ends: 1141 [2021-11-25 19:58:42,496 INFO L226 Difference]: Without dead ends: 787 [2021-11-25 19:58:42,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:58:42,503 INFO L933 BasicCegarLoop]: 607 mSDtfsCounter, 1128 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 2653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:42,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 1883 Invalid, 2653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 2211 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-25 19:58:42,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-11-25 19:58:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 738. [2021-11-25 19:58:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 507 states have (on average 1.5956607495069033) internal successors, (809), 540 states have internal predecessors, (809), 186 states have call successors, (186), 44 states have call predecessors, (186), 44 states have return successors, (187), 178 states have call predecessors, (187), 181 states have call successors, (187) [2021-11-25 19:58:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1182 transitions. [2021-11-25 19:58:42,571 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1182 transitions. Word has length 78 [2021-11-25 19:58:42,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:42,571 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 1182 transitions. [2021-11-25 19:58:42,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-25 19:58:42,572 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1182 transitions. [2021-11-25 19:58:42,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-25 19:58:42,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:42,576 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:42,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:58:42,576 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:42,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:42,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1726456405, now seen corresponding path program 1 times [2021-11-25 19:58:42,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:42,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129628668] [2021-11-25 19:58:42,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:42,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:58:42,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:42,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129628668] [2021-11-25 19:58:42,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129628668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:42,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:42,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:58:42,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950908573] [2021-11-25 19:58:42,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:42,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:58:42,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:42,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:58:42,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:42,759 INFO L87 Difference]: Start difference. First operand 738 states and 1182 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 19:58:43,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:43,972 INFO L93 Difference]: Finished difference Result 2373 states and 3867 transitions. [2021-11-25 19:58:43,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:58:43,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 82 [2021-11-25 19:58:43,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:43,994 INFO L225 Difference]: With dead ends: 2373 [2021-11-25 19:58:43,994 INFO L226 Difference]: Without dead ends: 1651 [2021-11-25 19:58:43,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:58:44,006 INFO L933 BasicCegarLoop]: 554 mSDtfsCounter, 1147 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1219 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:44,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1219 Valid, 945 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 19:58:44,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2021-11-25 19:58:44,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1485. [2021-11-25 19:58:44,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1043 states have (on average 1.6059443911792906) internal successors, (1675), 1106 states have internal predecessors, (1675), 357 states have call successors, (357), 79 states have call predecessors, (357), 84 states have return successors, (375), 335 states have call predecessors, (375), 352 states have call successors, (375) [2021-11-25 19:58:44,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 2407 transitions. [2021-11-25 19:58:44,148 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 2407 transitions. Word has length 82 [2021-11-25 19:58:44,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:44,149 INFO L470 AbstractCegarLoop]: Abstraction has 1485 states and 2407 transitions. [2021-11-25 19:58:44,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 19:58:44,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 2407 transitions. [2021-11-25 19:58:44,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-25 19:58:44,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:44,154 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:44,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:58:44,155 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:44,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:44,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1980402612, now seen corresponding path program 1 times [2021-11-25 19:58:44,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:44,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385394013] [2021-11-25 19:58:44,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:44,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:58:44,398 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:44,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385394013] [2021-11-25 19:58:44,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385394013] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:44,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:44,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:58:44,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509989628] [2021-11-25 19:58:44,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:44,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:58:44,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:44,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:58:44,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:44,401 INFO L87 Difference]: Start difference. First operand 1485 states and 2407 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 19:58:45,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:45,669 INFO L93 Difference]: Finished difference Result 4548 states and 7489 transitions. [2021-11-25 19:58:45,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:58:45,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 83 [2021-11-25 19:58:45,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:45,700 INFO L225 Difference]: With dead ends: 4548 [2021-11-25 19:58:45,700 INFO L226 Difference]: Without dead ends: 3080 [2021-11-25 19:58:45,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:58:45,714 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 1138 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:45,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1209 Valid, 949 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 19:58:45,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3080 states. [2021-11-25 19:58:45,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3080 to 2867. [2021-11-25 19:58:45,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2867 states, 2037 states have (on average 1.6131566028473245) internal successors, (3286), 2167 states have internal predecessors, (3286), 662 states have call successors, (662), 149 states have call predecessors, (662), 167 states have return successors, (740), 612 states have call predecessors, (740), 657 states have call successors, (740) [2021-11-25 19:58:45,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2867 states to 2867 states and 4688 transitions. [2021-11-25 19:58:45,986 INFO L78 Accepts]: Start accepts. Automaton has 2867 states and 4688 transitions. Word has length 83 [2021-11-25 19:58:45,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:45,990 INFO L470 AbstractCegarLoop]: Abstraction has 2867 states and 4688 transitions. [2021-11-25 19:58:45,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 19:58:45,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2867 states and 4688 transitions. [2021-11-25 19:58:45,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-25 19:58:45,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:45,993 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:45,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:58:45,994 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:45,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:45,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1262804343, now seen corresponding path program 1 times [2021-11-25 19:58:45,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:45,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926021063] [2021-11-25 19:58:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:45,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:58:46,166 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:46,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926021063] [2021-11-25 19:58:46,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926021063] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:46,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:46,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:58:46,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740814164] [2021-11-25 19:58:46,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:46,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:58:46,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:46,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:58:46,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:46,171 INFO L87 Difference]: Start difference. First operand 2867 states and 4688 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 19:58:47,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:47,611 INFO L93 Difference]: Finished difference Result 8740 states and 14609 transitions. [2021-11-25 19:58:47,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:58:47,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 84 [2021-11-25 19:58:47,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:47,679 INFO L225 Difference]: With dead ends: 8740 [2021-11-25 19:58:47,679 INFO L226 Difference]: Without dead ends: 5892 [2021-11-25 19:58:47,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:58:47,704 INFO L933 BasicCegarLoop]: 577 mSDtfsCounter, 1121 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:47,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1191 Valid, 962 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 19:58:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2021-11-25 19:58:48,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 5576. [2021-11-25 19:58:48,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5576 states, 3980 states have (on average 1.6135678391959798) internal successors, (6422), 4250 states have internal predecessors, (6422), 1256 states have call successors, (1256), 289 states have call predecessors, (1256), 339 states have return successors, (1546), 1150 states have call predecessors, (1546), 1251 states have call successors, (1546) [2021-11-25 19:58:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5576 states to 5576 states and 9224 transitions. [2021-11-25 19:58:48,236 INFO L78 Accepts]: Start accepts. Automaton has 5576 states and 9224 transitions. Word has length 84 [2021-11-25 19:58:48,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:48,236 INFO L470 AbstractCegarLoop]: Abstraction has 5576 states and 9224 transitions. [2021-11-25 19:58:48,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 19:58:48,237 INFO L276 IsEmpty]: Start isEmpty. Operand 5576 states and 9224 transitions. [2021-11-25 19:58:48,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-25 19:58:48,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:48,240 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:48,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:58:48,240 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:48,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:48,241 INFO L85 PathProgramCache]: Analyzing trace with hash 492098390, now seen corresponding path program 1 times [2021-11-25 19:58:48,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:48,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770111068] [2021-11-25 19:58:48,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:48,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:58:48,337 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:48,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770111068] [2021-11-25 19:58:48,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770111068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:48,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:48,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:58:48,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712336772] [2021-11-25 19:58:48,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:48,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:58:48,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:48,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:58:48,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:48,340 INFO L87 Difference]: Start difference. First operand 5576 states and 9224 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 19:58:50,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:50,069 INFO L93 Difference]: Finished difference Result 16977 states and 29136 transitions. [2021-11-25 19:58:50,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:58:50,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 85 [2021-11-25 19:58:50,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:50,193 INFO L225 Difference]: With dead ends: 16977 [2021-11-25 19:58:50,193 INFO L226 Difference]: Without dead ends: 11424 [2021-11-25 19:58:50,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:58:50,229 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 1108 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:50,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1177 Valid, 974 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 19:58:50,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11424 states. [2021-11-25 19:58:51,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11424 to 10893. [2021-11-25 19:58:51,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10893 states, 7783 states have (on average 1.6104329949890788) internal successors, (12534), 8345 states have internal predecessors, (12534), 2414 states have call successors, (2414), 569 states have call predecessors, (2414), 695 states have return successors, (3456), 2196 states have call predecessors, (3456), 2409 states have call successors, (3456) [2021-11-25 19:58:51,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10893 states to 10893 states and 18404 transitions. [2021-11-25 19:58:51,226 INFO L78 Accepts]: Start accepts. Automaton has 10893 states and 18404 transitions. Word has length 85 [2021-11-25 19:58:51,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:51,227 INFO L470 AbstractCegarLoop]: Abstraction has 10893 states and 18404 transitions. [2021-11-25 19:58:51,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 19:58:51,229 INFO L276 IsEmpty]: Start isEmpty. Operand 10893 states and 18404 transitions. [2021-11-25 19:58:51,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-25 19:58:51,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:51,232 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:51,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:58:51,233 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:51,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:51,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1924945767, now seen corresponding path program 1 times [2021-11-25 19:58:51,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:51,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666379450] [2021-11-25 19:58:51,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:51,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:58:51,336 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:51,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666379450] [2021-11-25 19:58:51,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666379450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:51,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:51,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:58:51,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753318184] [2021-11-25 19:58:51,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:51,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:58:51,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:51,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:58:51,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:51,339 INFO L87 Difference]: Start difference. First operand 10893 states and 18404 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 19:58:53,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:53,553 INFO L93 Difference]: Finished difference Result 33242 states and 59896 transitions. [2021-11-25 19:58:53,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:58:53,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2021-11-25 19:58:53,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:53,737 INFO L225 Difference]: With dead ends: 33242 [2021-11-25 19:58:53,738 INFO L226 Difference]: Without dead ends: 22370 [2021-11-25 19:58:53,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:58:53,810 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 1099 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1167 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:53,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1167 Valid, 989 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 19:58:53,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22370 states. [2021-11-25 19:58:55,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22370 to 21302. [2021-11-25 19:58:55,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21302 states, 15249 states have (on average 1.6089579644566856) internal successors, (24535), 16373 states have internal predecessors, (24535), 4670 states have call successors, (4670), 1127 states have call predecessors, (4670), 1382 states have return successors, (8107), 4227 states have call predecessors, (8107), 4665 states have call successors, (8107) [2021-11-25 19:58:56,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21302 states to 21302 states and 37312 transitions. [2021-11-25 19:58:56,023 INFO L78 Accepts]: Start accepts. Automaton has 21302 states and 37312 transitions. Word has length 86 [2021-11-25 19:58:56,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:56,024 INFO L470 AbstractCegarLoop]: Abstraction has 21302 states and 37312 transitions. [2021-11-25 19:58:56,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 19:58:56,024 INFO L276 IsEmpty]: Start isEmpty. Operand 21302 states and 37312 transitions. [2021-11-25 19:58:56,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-25 19:58:56,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:56,033 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:56,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:58:56,034 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:56,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:56,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1537559590, now seen corresponding path program 1 times [2021-11-25 19:58:56,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:56,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443549703] [2021-11-25 19:58:56,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:56,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-25 19:58:56,152 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:56,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443549703] [2021-11-25 19:58:56,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443549703] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:56,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:56,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:58:56,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415560913] [2021-11-25 19:58:56,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:56,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:58:56,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:56,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:58:56,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:56,155 INFO L87 Difference]: Start difference. First operand 21302 states and 37312 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-25 19:58:57,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:57,646 INFO L93 Difference]: Finished difference Result 45863 states and 83603 transitions. [2021-11-25 19:58:57,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:58:57,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 134 [2021-11-25 19:58:57,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:57,836 INFO L225 Difference]: With dead ends: 45863 [2021-11-25 19:58:57,837 INFO L226 Difference]: Without dead ends: 24578 [2021-11-25 19:58:57,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:58:57,937 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 120 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1735 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:57,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 1735 Invalid, 139 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:58:57,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24578 states. [2021-11-25 19:58:59,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24578 to 21542. [2021-11-25 19:58:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21542 states, 15472 states have (on average 1.6032187176835575) internal successors, (24805), 16580 states have internal predecessors, (24805), 4687 states have call successors, (4687), 1127 states have call predecessors, (4687), 1382 states have return successors, (8124), 4244 states have call predecessors, (8124), 4682 states have call successors, (8124) [2021-11-25 19:58:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21542 states to 21542 states and 37616 transitions. [2021-11-25 19:58:59,937 INFO L78 Accepts]: Start accepts. Automaton has 21542 states and 37616 transitions. Word has length 134 [2021-11-25 19:58:59,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:59,938 INFO L470 AbstractCegarLoop]: Abstraction has 21542 states and 37616 transitions. [2021-11-25 19:58:59,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-25 19:58:59,939 INFO L276 IsEmpty]: Start isEmpty. Operand 21542 states and 37616 transitions. [2021-11-25 19:58:59,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-25 19:58:59,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:59,950 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:59,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 19:58:59,951 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:59,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:59,952 INFO L85 PathProgramCache]: Analyzing trace with hash -173510532, now seen corresponding path program 1 times [2021-11-25 19:58:59,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:59,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134853823] [2021-11-25 19:58:59,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:59,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-25 19:59:00,093 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:00,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134853823] [2021-11-25 19:59:00,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134853823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:00,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961410886] [2021-11-25 19:59:00,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:00,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:00,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:00,098 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:00,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:59:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:00,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 1810 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:59:00,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-25 19:59:00,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:59:00,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961410886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:00,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:59:00,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 19:59:00,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30431024] [2021-11-25 19:59:00,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:00,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:59:00,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:00,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:59:00,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:59:00,876 INFO L87 Difference]: Start difference. First operand 21542 states and 37616 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 19:59:02,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:02,851 INFO L93 Difference]: Finished difference Result 45563 states and 82818 transitions. [2021-11-25 19:59:02,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:59:02,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 137 [2021-11-25 19:59:02,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:02,988 INFO L225 Difference]: With dead ends: 45563 [2021-11-25 19:59:02,988 INFO L226 Difference]: Without dead ends: 24038 [2021-11-25 19:59:03,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:59:03,081 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 213 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:03,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1422 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:59:03,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24038 states. [2021-11-25 19:59:04,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24038 to 24038. [2021-11-25 19:59:04,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24038 states, 17904 states have (on average 1.6463918677390528) internal successors, (29477), 19012 states have internal predecessors, (29477), 4687 states have call successors, (4687), 1191 states have call predecessors, (4687), 1446 states have return successors, (8124), 4244 states have call predecessors, (8124), 4682 states have call successors, (8124) [2021-11-25 19:59:04,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24038 states to 24038 states and 42288 transitions. [2021-11-25 19:59:04,893 INFO L78 Accepts]: Start accepts. Automaton has 24038 states and 42288 transitions. Word has length 137 [2021-11-25 19:59:04,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:04,893 INFO L470 AbstractCegarLoop]: Abstraction has 24038 states and 42288 transitions. [2021-11-25 19:59:04,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 19:59:04,894 INFO L276 IsEmpty]: Start isEmpty. Operand 24038 states and 42288 transitions. [2021-11-25 19:59:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-25 19:59:04,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:04,903 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:04,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:05,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 19:59:05,126 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:59:05,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:05,126 INFO L85 PathProgramCache]: Analyzing trace with hash -941854940, now seen corresponding path program 1 times [2021-11-25 19:59:05,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:05,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557865938] [2021-11-25 19:59:05,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:05,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-25 19:59:05,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:05,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557865938] [2021-11-25 19:59:05,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557865938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:05,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237682566] [2021-11-25 19:59:05,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:05,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:05,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:05,285 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:05,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:59:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:05,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:59:05,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 19:59:06,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:59:06,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237682566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:06,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:59:06,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 19:59:06,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809695134] [2021-11-25 19:59:06,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:06,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:59:06,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:06,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:59:06,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:59:06,135 INFO L87 Difference]: Start difference. First operand 24038 states and 42288 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 19:59:07,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:07,772 INFO L93 Difference]: Finished difference Result 50555 states and 92096 transitions. [2021-11-25 19:59:07,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:59:07,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 142 [2021-11-25 19:59:07,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:07,966 INFO L225 Difference]: With dead ends: 50555 [2021-11-25 19:59:07,967 INFO L226 Difference]: Without dead ends: 26534 [2021-11-25 19:59:08,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:59:08,087 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 211 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:08,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1422 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:59:08,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26534 states. [2021-11-25 19:59:09,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26534 to 26534. [2021-11-25 19:59:09,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26534 states, 20336 states have (on average 1.6792387883556255) internal successors, (34149), 21444 states have internal predecessors, (34149), 4687 states have call successors, (4687), 1255 states have call predecessors, (4687), 1510 states have return successors, (8124), 4244 states have call predecessors, (8124), 4682 states have call successors, (8124) [2021-11-25 19:59:09,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26534 states to 26534 states and 46960 transitions. [2021-11-25 19:59:09,951 INFO L78 Accepts]: Start accepts. Automaton has 26534 states and 46960 transitions. Word has length 142 [2021-11-25 19:59:09,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:09,952 INFO L470 AbstractCegarLoop]: Abstraction has 26534 states and 46960 transitions. [2021-11-25 19:59:09,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 19:59:09,953 INFO L276 IsEmpty]: Start isEmpty. Operand 26534 states and 46960 transitions. [2021-11-25 19:59:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-25 19:59:09,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:09,963 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:10,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:10,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 19:59:10,178 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:59:10,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:10,178 INFO L85 PathProgramCache]: Analyzing trace with hash 219763924, now seen corresponding path program 1 times [2021-11-25 19:59:10,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:10,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424281951] [2021-11-25 19:59:10,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:10,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-25 19:59:10,522 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:10,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424281951] [2021-11-25 19:59:10,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424281951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:10,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402545001] [2021-11-25 19:59:10,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:10,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:10,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:10,523 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:10,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:59:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:10,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 1819 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:59:10,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-25 19:59:11,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:59:11,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402545001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:11,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:59:11,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2021-11-25 19:59:11,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054790077] [2021-11-25 19:59:11,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:11,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:59:11,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:11,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:59:11,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-11-25 19:59:11,134 INFO L87 Difference]: Start difference. First operand 26534 states and 46960 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 19:59:12,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:12,638 INFO L93 Difference]: Finished difference Result 55547 states and 101374 transitions. [2021-11-25 19:59:12,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:59:12,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 146 [2021-11-25 19:59:12,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:12,768 INFO L225 Difference]: With dead ends: 55547 [2021-11-25 19:59:12,769 INFO L226 Difference]: Without dead ends: 29030 [2021-11-25 19:59:12,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:59:12,853 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 209 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:12,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1422 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:59:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29030 states. [2021-11-25 19:59:14,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29030 to 29030. [2021-11-25 19:59:14,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29030 states, 22768 states have (on average 1.705068517217147) internal successors, (38821), 23876 states have internal predecessors, (38821), 4687 states have call successors, (4687), 1319 states have call predecessors, (4687), 1574 states have return successors, (8124), 4244 states have call predecessors, (8124), 4682 states have call successors, (8124) [2021-11-25 19:59:14,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29030 states to 29030 states and 51632 transitions. [2021-11-25 19:59:14,356 INFO L78 Accepts]: Start accepts. Automaton has 29030 states and 51632 transitions. Word has length 146 [2021-11-25 19:59:14,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:14,357 INFO L470 AbstractCegarLoop]: Abstraction has 29030 states and 51632 transitions. [2021-11-25 19:59:14,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 19:59:14,357 INFO L276 IsEmpty]: Start isEmpty. Operand 29030 states and 51632 transitions. [2021-11-25 19:59:14,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-25 19:59:14,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:14,366 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:14,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:14,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 19:59:14,594 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:59:14,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:14,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1220894688, now seen corresponding path program 1 times [2021-11-25 19:59:14,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:14,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792993568] [2021-11-25 19:59:14,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:14,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-25 19:59:14,922 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:14,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792993568] [2021-11-25 19:59:14,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792993568] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:14,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493673427] [2021-11-25 19:59:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:14,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:14,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:14,924 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:14,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:59:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:15,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 1822 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:59:15,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 19:59:15,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:59:15,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493673427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:15,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:59:15,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2021-11-25 19:59:15,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520663259] [2021-11-25 19:59:15,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:15,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:59:15,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:15,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:59:15,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-11-25 19:59:15,786 INFO L87 Difference]: Start difference. First operand 29030 states and 51632 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 19:59:17,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:17,157 INFO L93 Difference]: Finished difference Result 60539 states and 110652 transitions. [2021-11-25 19:59:17,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:59:17,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 149 [2021-11-25 19:59:17,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:17,277 INFO L225 Difference]: With dead ends: 60539 [2021-11-25 19:59:17,277 INFO L226 Difference]: Without dead ends: 31526 [2021-11-25 19:59:17,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:59:17,348 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 207 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:17,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1422 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:59:17,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31526 states. [2021-11-25 19:59:18,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31526 to 31526. [2021-11-25 19:59:18,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31526 states, 25200 states have (on average 1.7259126984126985) internal successors, (43493), 26308 states have internal predecessors, (43493), 4687 states have call successors, (4687), 1383 states have call predecessors, (4687), 1638 states have return successors, (8124), 4244 states have call predecessors, (8124), 4682 states have call successors, (8124) [2021-11-25 19:59:18,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31526 states to 31526 states and 56304 transitions. [2021-11-25 19:59:18,844 INFO L78 Accepts]: Start accepts. Automaton has 31526 states and 56304 transitions. Word has length 149 [2021-11-25 19:59:18,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:18,845 INFO L470 AbstractCegarLoop]: Abstraction has 31526 states and 56304 transitions. [2021-11-25 19:59:18,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 19:59:18,845 INFO L276 IsEmpty]: Start isEmpty. Operand 31526 states and 56304 transitions. [2021-11-25 19:59:18,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-25 19:59:18,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:18,854 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:18,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:19,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 19:59:19,082 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:59:19,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:19,082 INFO L85 PathProgramCache]: Analyzing trace with hash 643246222, now seen corresponding path program 1 times [2021-11-25 19:59:19,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:19,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801200537] [2021-11-25 19:59:19,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:19,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-25 19:59:19,410 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:19,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801200537] [2021-11-25 19:59:19,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801200537] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:19,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633119154] [2021-11-25 19:59:19,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:19,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:19,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:19,412 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:19,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:59:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:19,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 1818 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:59:19,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-25 19:59:20,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:59:20,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633119154] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:20,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:59:20,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 21 [2021-11-25 19:59:20,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500607330] [2021-11-25 19:59:20,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:20,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:59:20,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:20,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:59:20,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:59:20,189 INFO L87 Difference]: Start difference. First operand 31526 states and 56304 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-25 19:59:21,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:21,711 INFO L93 Difference]: Finished difference Result 32667 states and 59732 transitions. [2021-11-25 19:59:21,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:59:21,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) Word has length 151 [2021-11-25 19:59:21,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:22,066 INFO L225 Difference]: With dead ends: 32667 [2021-11-25 19:59:22,066 INFO L226 Difference]: Without dead ends: 32510 [2021-11-25 19:59:22,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:59:22,081 INFO L933 BasicCegarLoop]: 547 mSDtfsCounter, 496 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:22,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 1261 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:59:22,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32510 states. [2021-11-25 19:59:23,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32510 to 31588. [2021-11-25 19:59:23,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31588 states, 25262 states have (on average 1.7241311060090254) internal successors, (43555), 26370 states have internal predecessors, (43555), 4687 states have call successors, (4687), 1383 states have call predecessors, (4687), 1638 states have return successors, (8124), 4244 states have call predecessors, (8124), 4682 states have call successors, (8124) [2021-11-25 19:59:23,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31588 states to 31588 states and 56366 transitions. [2021-11-25 19:59:23,436 INFO L78 Accepts]: Start accepts. Automaton has 31588 states and 56366 transitions. Word has length 151 [2021-11-25 19:59:23,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:23,436 INFO L470 AbstractCegarLoop]: Abstraction has 31588 states and 56366 transitions. [2021-11-25 19:59:23,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-25 19:59:23,437 INFO L276 IsEmpty]: Start isEmpty. Operand 31588 states and 56366 transitions. [2021-11-25 19:59:23,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-25 19:59:23,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:23,449 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:23,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-25 19:59:23,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:23,674 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:59:23,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:23,674 INFO L85 PathProgramCache]: Analyzing trace with hash -747995850, now seen corresponding path program 1 times [2021-11-25 19:59:23,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:23,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500598840] [2021-11-25 19:59:23,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:23,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-25 19:59:23,981 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:23,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500598840] [2021-11-25 19:59:23,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500598840] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:23,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325441584] [2021-11-25 19:59:23,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:23,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:23,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:23,983 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:24,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:59:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:24,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:59:24,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:24,833 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-25 19:59:24,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:59:24,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325441584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:24,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:59:24,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18] total 21 [2021-11-25 19:59:24,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089255832] [2021-11-25 19:59:24,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:24,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:59:24,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:24,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:59:24,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:59:24,837 INFO L87 Difference]: Start difference. First operand 31588 states and 56366 transitions. Second operand has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 1 states have call successors, (24) [2021-11-25 19:59:25,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:25,711 INFO L93 Difference]: Finished difference Result 31815 states and 56651 transitions. [2021-11-25 19:59:25,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:59:25,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 1 states have call successors, (24) Word has length 156 [2021-11-25 19:59:25,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:25,823 INFO L225 Difference]: With dead ends: 31815 [2021-11-25 19:59:25,823 INFO L226 Difference]: Without dead ends: 31658 [2021-11-25 19:59:25,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-11-25 19:59:25,835 INFO L933 BasicCegarLoop]: 550 mSDtfsCounter, 30 mSDsluCounter, 1712 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2164 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:25,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 2164 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:59:25,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31658 states. [2021-11-25 19:59:27,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31658 to 31588. [2021-11-25 19:59:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31588 states, 25262 states have (on average 1.7216768268545641) internal successors, (43493), 26370 states have internal predecessors, (43493), 4687 states have call successors, (4687), 1383 states have call predecessors, (4687), 1638 states have return successors, (8124), 4244 states have call predecessors, (8124), 4682 states have call successors, (8124) [2021-11-25 19:59:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31588 states to 31588 states and 56304 transitions. [2021-11-25 19:59:27,181 INFO L78 Accepts]: Start accepts. Automaton has 31588 states and 56304 transitions. Word has length 156 [2021-11-25 19:59:27,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:27,182 INFO L470 AbstractCegarLoop]: Abstraction has 31588 states and 56304 transitions. [2021-11-25 19:59:27,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 1 states have call successors, (24) [2021-11-25 19:59:27,182 INFO L276 IsEmpty]: Start isEmpty. Operand 31588 states and 56304 transitions. [2021-11-25 19:59:27,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-25 19:59:27,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:27,193 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:27,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:27,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 19:59:27,422 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:59:27,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:27,422 INFO L85 PathProgramCache]: Analyzing trace with hash 561167404, now seen corresponding path program 1 times [2021-11-25 19:59:27,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:27,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285129124] [2021-11-25 19:59:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:27,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-25 19:59:27,736 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:27,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285129124] [2021-11-25 19:59:27,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285129124] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:27,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524383679] [2021-11-25 19:59:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:27,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:27,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:27,739 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:27,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:59:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:28,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:59:28,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-25 19:59:28,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:59:28,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524383679] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:28,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:59:28,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2021-11-25 19:59:28,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338751491] [2021-11-25 19:59:28,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:28,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:59:28,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:28,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:59:28,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-11-25 19:59:28,362 INFO L87 Difference]: Start difference. First operand 31588 states and 56304 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-25 19:59:29,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:29,741 INFO L93 Difference]: Finished difference Result 33208 states and 61947 transitions. [2021-11-25 19:59:29,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:59:29,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) Word has length 163 [2021-11-25 19:59:29,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:29,863 INFO L225 Difference]: With dead ends: 33208 [2021-11-25 19:59:29,863 INFO L226 Difference]: Without dead ends: 33051 [2021-11-25 19:59:29,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:59:29,876 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 44 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:29,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 1702 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:59:29,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33051 states. [2021-11-25 19:59:31,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33051 to 31712. [2021-11-25 19:59:31,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31712 states, 25386 states have (on average 1.7181517371779722) internal successors, (43617), 26494 states have internal predecessors, (43617), 4687 states have call successors, (4687), 1383 states have call predecessors, (4687), 1638 states have return successors, (8124), 4244 states have call predecessors, (8124), 4682 states have call successors, (8124) [2021-11-25 19:59:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31712 states to 31712 states and 56428 transitions. [2021-11-25 19:59:31,408 INFO L78 Accepts]: Start accepts. Automaton has 31712 states and 56428 transitions. Word has length 163 [2021-11-25 19:59:31,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:31,409 INFO L470 AbstractCegarLoop]: Abstraction has 31712 states and 56428 transitions. [2021-11-25 19:59:31,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-25 19:59:31,409 INFO L276 IsEmpty]: Start isEmpty. Operand 31712 states and 56428 transitions. [2021-11-25 19:59:31,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-25 19:59:31,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:31,435 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:31,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:31,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 19:59:31,662 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:59:31,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:31,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1545765087, now seen corresponding path program 1 times [2021-11-25 19:59:31,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:31,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203711858] [2021-11-25 19:59:31,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:31,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-25 19:59:32,018 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:32,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203711858] [2021-11-25 19:59:32,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203711858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:32,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358708850] [2021-11-25 19:59:32,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:32,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:32,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:32,022 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:32,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d0a24-cacd-449e-9c7f-d33c60f2067f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:59:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:32,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 1927 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 19:59:32,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-25 19:59:33,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:59:36,698 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2021-11-25 19:59:43,550 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2021-11-25 19:59:43,901 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2021-11-25 19:59:51,634 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2021-11-25 19:59:52,026 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time...