./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba --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 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:17:37,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:17:37,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:17:37,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:17:37,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:17:37,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:17:37,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:17:37,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:17:37,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:17:37,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:17:37,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:17:37,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:17:37,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:17:37,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:17:37,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:17:37,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:17:37,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:17:37,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:17:37,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:17:37,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:17:37,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:17:37,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:17:37,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:17:37,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:17:37,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:17:37,999 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:17:37,999 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:17:38,000 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:17:38,001 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:17:38,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:17:38,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:17:38,003 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:17:38,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:17:38,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:17:38,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:17:38,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:17:38,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:17:38,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:17:38,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:17:38,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:17:38,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:17:38,015 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:17:38,060 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:17:38,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:17:38,061 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:17:38,061 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:17:38,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:17:38,062 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:17:38,063 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:17:38,063 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:17:38,063 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:17:38,063 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:17:38,065 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:17:38,065 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:17:38,065 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:17:38,065 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:17:38,066 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:17:38,066 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:17:38,066 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:17:38,066 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:17:38,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:17:38,067 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:17:38,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:17:38,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:17:38,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:17:38,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:17:38,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:17:38,069 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:17:38,069 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:17:38,069 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:17:38,069 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:17:38,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:17:38,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:17:38,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:17:38,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:17:38,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:17:38,071 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:17:38,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:17:38,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:17:38,072 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:17:38,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:17:38,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:17:38,073 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:17:38,073 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 [2022-11-22 02:17:38,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:17:38,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:17:38,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:17:38,418 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:17:38,418 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:17:38,420 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2022-11-22 02:17:41,731 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:17:42,071 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:17:42,072 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2022-11-22 02:17:42,093 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/data/4f803e38d/fd199c59e9f848aa92213ca69a8ad394/FLAG1bc73071f [2022-11-22 02:17:42,109 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/data/4f803e38d/fd199c59e9f848aa92213ca69a8ad394 [2022-11-22 02:17:42,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:17:42,114 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:17:42,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:17:42,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:17:42,120 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:17:42,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:17:42" (1/1) ... [2022-11-22 02:17:42,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b4d188b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:42, skipping insertion in model container [2022-11-22 02:17:42,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:17:42" (1/1) ... [2022-11-22 02:17:42,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:17:42,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:17:42,663 WARN L237 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_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2022-11-22 02:17:42,761 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:17:42,790 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:17:42,977 WARN L237 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_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2022-11-22 02:17:43,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:17:43,046 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:17:43,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:43 WrapperNode [2022-11-22 02:17:43,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:17:43,049 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:17:43,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:17:43,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:17:43,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:43" (1/1) ... [2022-11-22 02:17:43,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:43" (1/1) ... [2022-11-22 02:17:43,147 INFO L138 Inliner]: procedures = 91, calls = 340, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 862 [2022-11-22 02:17:43,148 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:17:43,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:17:43,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:17:43,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:17:43,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:43" (1/1) ... [2022-11-22 02:17:43,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:43" (1/1) ... [2022-11-22 02:17:43,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:43" (1/1) ... [2022-11-22 02:17:43,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:43" (1/1) ... [2022-11-22 02:17:43,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:43" (1/1) ... [2022-11-22 02:17:43,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:43" (1/1) ... [2022-11-22 02:17:43,216 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:43" (1/1) ... [2022-11-22 02:17:43,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:43" (1/1) ... [2022-11-22 02:17:43,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:17:43,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:17:43,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:17:43,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:17:43,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:43" (1/1) ... [2022-11-22 02:17:43,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:17:43,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:17:43,275 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:17:43,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:17:43,364 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-22 02:17:43,365 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-22 02:17:43,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:17:43,365 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-22 02:17:43,365 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-22 02:17:43,366 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-22 02:17:43,366 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-22 02:17:43,366 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2022-11-22 02:17:43,366 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2022-11-22 02:17:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 02:17:43,367 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 02:17:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 02:17:43,367 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 02:17:43,368 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-22 02:17:43,368 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-22 02:17:43,368 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 02:17:43,369 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 02:17:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-22 02:17:43,369 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-22 02:17:43,370 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 02:17:43,370 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 02:17:43,370 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 02:17:43,371 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 02:17:43,372 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-22 02:17:43,372 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-22 02:17:43,373 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 02:17:43,373 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 02:17:43,373 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 02:17:43,374 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 02:17:43,374 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 02:17:43,376 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 02:17:43,376 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 02:17:43,377 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 02:17:43,377 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 02:17:43,377 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 02:17:43,378 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 02:17:43,378 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 02:17:43,378 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 02:17:43,378 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 02:17:43,379 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 02:17:43,379 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 02:17:43,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:17:43,380 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-22 02:17:43,380 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-22 02:17:43,380 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 02:17:43,380 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 02:17:43,381 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 02:17:43,382 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 02:17:43,382 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 02:17:43,383 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 02:17:43,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:17:43,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:17:43,383 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 02:17:43,384 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 02:17:43,621 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:17:43,624 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:17:45,267 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:17:46,197 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:17:46,198 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-22 02:17:46,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:17:46 BoogieIcfgContainer [2022-11-22 02:17:46,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:17:46,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:17:46,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:17:46,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:17:46,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:17:42" (1/3) ... [2022-11-22 02:17:46,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc34237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:17:46, skipping insertion in model container [2022-11-22 02:17:46,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:43" (2/3) ... [2022-11-22 02:17:46,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc34237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:17:46, skipping insertion in model container [2022-11-22 02:17:46,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:17:46" (3/3) ... [2022-11-22 02:17:46,230 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product29.cil.c [2022-11-22 02:17:46,256 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:17:46,256 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:17:46,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:17:46,363 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7b32bed6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:17:46,364 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:17:46,373 INFO L276 IsEmpty]: Start isEmpty. Operand has 409 states, 282 states have (on average 1.599290780141844) internal successors, (451), 300 states have internal predecessors, (451), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-22 02:17:46,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-22 02:17:46,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:46,420 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:46,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:46,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:46,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1819455823, now seen corresponding path program 1 times [2022-11-22 02:17:46,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:46,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435174512] [2022-11-22 02:17:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:46,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:17:47,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:47,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435174512] [2022-11-22 02:17:47,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435174512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:47,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:47,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:17:47,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971025594] [2022-11-22 02:17:47,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:47,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:17:47,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:47,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:17:47,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:17:47,569 INFO L87 Difference]: Start difference. First operand has 409 states, 282 states have (on average 1.599290780141844) internal successors, (451), 300 states have internal predecessors, (451), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-22 02:17:48,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:48,464 INFO L93 Difference]: Finished difference Result 1204 states and 1950 transitions. [2022-11-22 02:17:48,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 02:17:48,467 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2022-11-22 02:17:48,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:48,487 INFO L225 Difference]: With dead ends: 1204 [2022-11-22 02:17:48,487 INFO L226 Difference]: Without dead ends: 800 [2022-11-22 02:17:48,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-22 02:17:48,501 INFO L413 NwaCegarLoop]: 820 mSDtfsCounter, 1011 mSDsluCounter, 3629 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 4449 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:48,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1026 Valid, 4449 Invalid, 447 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [61 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:17:48,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-11-22 02:17:48,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 784. [2022-11-22 02:17:48,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 549 states have (on average 1.5810564663023678) internal successors, (868), 576 states have internal predecessors, (868), 188 states have call successors, (188), 47 states have call predecessors, (188), 46 states have return successors, (193), 185 states have call predecessors, (193), 184 states have call successors, (193) [2022-11-22 02:17:48,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1249 transitions. [2022-11-22 02:17:48,624 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1249 transitions. Word has length 82 [2022-11-22 02:17:48,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:48,625 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1249 transitions. [2022-11-22 02:17:48,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-22 02:17:48,626 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1249 transitions. [2022-11-22 02:17:48,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-22 02:17:48,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:48,631 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:48,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:17:48,632 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:48,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:48,633 INFO L85 PathProgramCache]: Analyzing trace with hash 307058614, now seen corresponding path program 1 times [2022-11-22 02:17:48,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:48,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249159929] [2022-11-22 02:17:48,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:48,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:17:49,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:49,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249159929] [2022-11-22 02:17:49,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249159929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:49,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:49,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:17:49,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636489302] [2022-11-22 02:17:49,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:49,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:17:49,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:49,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:17:49,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:17:49,062 INFO L87 Difference]: Start difference. First operand 784 states and 1249 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 02:17:49,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:49,362 INFO L93 Difference]: Finished difference Result 1219 states and 1953 transitions. [2022-11-22 02:17:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:17:49,363 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 86 [2022-11-22 02:17:49,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:49,375 INFO L225 Difference]: With dead ends: 1219 [2022-11-22 02:17:49,375 INFO L226 Difference]: Without dead ends: 829 [2022-11-22 02:17:49,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:17:49,387 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 32 mSDsluCounter, 3139 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3781 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:49,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 3781 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:17:49,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-11-22 02:17:49,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 798. [2022-11-22 02:17:49,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 559 states have (on average 1.5706618962432917) internal successors, (878), 586 states have internal predecessors, (878), 188 states have call successors, (188), 47 states have call predecessors, (188), 50 states have return successors, (203), 189 states have call predecessors, (203), 184 states have call successors, (203) [2022-11-22 02:17:49,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1269 transitions. [2022-11-22 02:17:49,490 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1269 transitions. Word has length 86 [2022-11-22 02:17:49,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:49,490 INFO L495 AbstractCegarLoop]: Abstraction has 798 states and 1269 transitions. [2022-11-22 02:17:49,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 02:17:49,491 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1269 transitions. [2022-11-22 02:17:49,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-22 02:17:49,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:49,496 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:49,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:17:49,497 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:49,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:49,497 INFO L85 PathProgramCache]: Analyzing trace with hash -763691551, now seen corresponding path program 1 times [2022-11-22 02:17:49,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:49,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545541735] [2022-11-22 02:17:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:49,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:17:50,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:50,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545541735] [2022-11-22 02:17:50,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545541735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:50,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:50,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:17:50,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037615462] [2022-11-22 02:17:50,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:50,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:17:50,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:50,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:17:50,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:17:50,765 INFO L87 Difference]: Start difference. First operand 798 states and 1269 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-22 02:17:52,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:52,425 INFO L93 Difference]: Finished difference Result 3105 states and 5034 transitions. [2022-11-22 02:17:52,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:17:52,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2022-11-22 02:17:52,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:52,439 INFO L225 Difference]: With dead ends: 3105 [2022-11-22 02:17:52,440 INFO L226 Difference]: Without dead ends: 2322 [2022-11-22 02:17:52,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:17:52,446 INFO L413 NwaCegarLoop]: 1241 mSDtfsCounter, 1178 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 3074 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:52,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1182 Valid, 3074 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 02:17:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2022-11-22 02:17:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2010. [2022-11-22 02:17:52,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 1459 states have (on average 1.5496915695681974) internal successors, (2261), 1511 states have internal predecessors, (2261), 422 states have call successors, (422), 117 states have call predecessors, (422), 128 states have return successors, (518), 419 states have call predecessors, (518), 414 states have call successors, (518) [2022-11-22 02:17:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3201 transitions. [2022-11-22 02:17:52,704 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3201 transitions. Word has length 87 [2022-11-22 02:17:52,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:52,706 INFO L495 AbstractCegarLoop]: Abstraction has 2010 states and 3201 transitions. [2022-11-22 02:17:52,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-22 02:17:52,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3201 transitions. [2022-11-22 02:17:52,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-22 02:17:52,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:52,712 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:52,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:17:52,712 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:52,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:52,713 INFO L85 PathProgramCache]: Analyzing trace with hash -89730047, now seen corresponding path program 1 times [2022-11-22 02:17:52,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:52,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740384321] [2022-11-22 02:17:52,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:52,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:17:53,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:53,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740384321] [2022-11-22 02:17:53,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740384321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:53,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:53,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:17:53,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035999383] [2022-11-22 02:17:53,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:53,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:17:53,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:53,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:17:53,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:17:53,040 INFO L87 Difference]: Start difference. First operand 2010 states and 3201 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 02:17:53,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:53,427 INFO L93 Difference]: Finished difference Result 3142 states and 5038 transitions. [2022-11-22 02:17:53,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:17:53,428 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 87 [2022-11-22 02:17:53,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:53,442 INFO L225 Difference]: With dead ends: 3142 [2022-11-22 02:17:53,442 INFO L226 Difference]: Without dead ends: 2129 [2022-11-22 02:17:53,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:17:53,451 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 31 mSDsluCounter, 3150 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3795 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:53,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 3795 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:17:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-11-22 02:17:53,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 2069. [2022-11-22 02:17:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 1502 states have (on average 1.5459387483355527) internal successors, (2322), 1549 states have internal predecessors, (2322), 434 states have call successors, (434), 117 states have call predecessors, (434), 132 states have return successors, (559), 440 states have call predecessors, (559), 426 states have call successors, (559) [2022-11-22 02:17:53,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 3315 transitions. [2022-11-22 02:17:53,629 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 3315 transitions. Word has length 87 [2022-11-22 02:17:53,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:53,630 INFO L495 AbstractCegarLoop]: Abstraction has 2069 states and 3315 transitions. [2022-11-22 02:17:53,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 02:17:53,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 3315 transitions. [2022-11-22 02:17:53,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-22 02:17:53,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:53,634 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:53,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:17:53,634 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:53,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:53,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1303691788, now seen corresponding path program 1 times [2022-11-22 02:17:53,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:53,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962659197] [2022-11-22 02:17:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:53,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:17:53,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:53,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962659197] [2022-11-22 02:17:53,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962659197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:53,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:53,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:17:53,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362618939] [2022-11-22 02:17:53,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:53,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:17:53,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:53,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:17:53,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:17:53,925 INFO L87 Difference]: Start difference. First operand 2069 states and 3315 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-22 02:17:55,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:55,294 INFO L93 Difference]: Finished difference Result 4534 states and 7324 transitions. [2022-11-22 02:17:55,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:17:55,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 93 [2022-11-22 02:17:55,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:55,322 INFO L225 Difference]: With dead ends: 4534 [2022-11-22 02:17:55,322 INFO L226 Difference]: Without dead ends: 3111 [2022-11-22 02:17:55,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:17:55,343 INFO L413 NwaCegarLoop]: 1154 mSDtfsCounter, 1146 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 2136 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:55,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1146 Valid, 2136 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 02:17:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-11-22 02:17:55,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 3070. [2022-11-22 02:17:55,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3070 states, 2199 states have (on average 1.4943155979990905) internal successors, (3286), 2271 states have internal predecessors, (3286), 651 states have call successors, (651), 194 states have call predecessors, (651), 219 states have return successors, (882), 662 states have call predecessors, (882), 640 states have call successors, (882) [2022-11-22 02:17:55,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3070 states to 3070 states and 4819 transitions. [2022-11-22 02:17:55,708 INFO L78 Accepts]: Start accepts. Automaton has 3070 states and 4819 transitions. Word has length 93 [2022-11-22 02:17:55,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:55,709 INFO L495 AbstractCegarLoop]: Abstraction has 3070 states and 4819 transitions. [2022-11-22 02:17:55,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-22 02:17:55,709 INFO L276 IsEmpty]: Start isEmpty. Operand 3070 states and 4819 transitions. [2022-11-22 02:17:55,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-22 02:17:55,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:55,713 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:55,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:17:55,714 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:55,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:55,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1878026199, now seen corresponding path program 1 times [2022-11-22 02:17:55,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:55,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146139867] [2022-11-22 02:17:55,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:55,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:17:56,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:56,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146139867] [2022-11-22 02:17:56,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146139867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:56,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:56,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:17:56,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132062793] [2022-11-22 02:17:56,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:56,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:17:56,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:56,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:17:56,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:17:56,110 INFO L87 Difference]: Start difference. First operand 3070 states and 4819 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-22 02:17:57,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:57,053 INFO L93 Difference]: Finished difference Result 5309 states and 8380 transitions. [2022-11-22 02:17:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:17:57,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 95 [2022-11-22 02:17:57,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:57,077 INFO L225 Difference]: With dead ends: 5309 [2022-11-22 02:17:57,078 INFO L226 Difference]: Without dead ends: 3111 [2022-11-22 02:17:57,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:17:57,096 INFO L413 NwaCegarLoop]: 815 mSDtfsCounter, 519 mSDsluCounter, 2024 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 2839 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:57,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 2839 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:17:57,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-11-22 02:17:57,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 3086. [2022-11-22 02:17:57,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3086 states, 2208 states have (on average 1.4923007246376812) internal successors, (3295), 2284 states have internal predecessors, (3295), 655 states have call successors, (655), 197 states have call predecessors, (655), 222 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2022-11-22 02:17:57,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3086 states to 3086 states and 4843 transitions. [2022-11-22 02:17:57,387 INFO L78 Accepts]: Start accepts. Automaton has 3086 states and 4843 transitions. Word has length 95 [2022-11-22 02:17:57,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:57,387 INFO L495 AbstractCegarLoop]: Abstraction has 3086 states and 4843 transitions. [2022-11-22 02:17:57,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-22 02:17:57,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states and 4843 transitions. [2022-11-22 02:17:57,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-22 02:17:57,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:57,392 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:17:57,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:17:57,392 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:57,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:57,393 INFO L85 PathProgramCache]: Analyzing trace with hash -411671538, now seen corresponding path program 1 times [2022-11-22 02:17:57,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:57,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965200075] [2022-11-22 02:17:57,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:57,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:57,597 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 02:17:57,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:57,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965200075] [2022-11-22 02:17:57,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965200075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:17:57,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962444683] [2022-11-22 02:17:57,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:57,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:17:57,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:17:57,603 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:17:57,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:17:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:58,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:17:58,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:17:58,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:17:58,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962444683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:58,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:17:58,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-22 02:17:58,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546406523] [2022-11-22 02:17:58,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:58,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:17:58,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:58,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:17:58,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:17:58,102 INFO L87 Difference]: Start difference. First operand 3086 states and 4843 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 02:17:58,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:58,593 INFO L93 Difference]: Finished difference Result 6211 states and 9938 transitions. [2022-11-22 02:17:58,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:17:58,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 99 [2022-11-22 02:17:58,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:58,652 INFO L225 Difference]: With dead ends: 6211 [2022-11-22 02:17:58,653 INFO L226 Difference]: Without dead ends: 3140 [2022-11-22 02:17:58,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:17:58,681 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 85 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1689 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:58,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1689 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:17:58,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2022-11-22 02:17:58,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 3140. [2022-11-22 02:17:58,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 2253 states have (on average 1.486462494451842) internal successors, (3349), 2329 states have internal predecessors, (3349), 655 states have call successors, (655), 206 states have call predecessors, (655), 231 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2022-11-22 02:17:58,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4897 transitions. [2022-11-22 02:17:58,956 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4897 transitions. Word has length 99 [2022-11-22 02:17:58,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:58,957 INFO L495 AbstractCegarLoop]: Abstraction has 3140 states and 4897 transitions. [2022-11-22 02:17:58,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 02:17:58,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4897 transitions. [2022-11-22 02:17:58,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-22 02:17:58,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:58,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:58,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:17:59,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:17:59,170 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:59,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:59,171 INFO L85 PathProgramCache]: Analyzing trace with hash -52146884, now seen corresponding path program 1 times [2022-11-22 02:17:59,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:59,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499048316] [2022-11-22 02:17:59,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:59,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:17:59,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:59,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499048316] [2022-11-22 02:17:59,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499048316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:17:59,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143038516] [2022-11-22 02:17:59,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:59,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:17:59,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:17:59,466 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:17:59,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:17:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:59,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 1382 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:17:59,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 02:17:59,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:17:59,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143038516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:59,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:17:59,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-22 02:17:59,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956407957] [2022-11-22 02:17:59,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:59,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:17:59,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:59,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:17:59,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:17:59,970 INFO L87 Difference]: Start difference. First operand 3140 states and 4897 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 02:18:00,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:00,465 INFO L93 Difference]: Finished difference Result 6292 states and 9956 transitions. [2022-11-22 02:18:00,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:18:00,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 102 [2022-11-22 02:18:00,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:00,491 INFO L225 Difference]: With dead ends: 6292 [2022-11-22 02:18:00,491 INFO L226 Difference]: Without dead ends: 3131 [2022-11-22 02:18:00,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:18:00,521 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 91 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:00,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1685 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:18:00,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2022-11-22 02:18:00,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3131. [2022-11-22 02:18:00,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 2244 states have (on average 1.4763814616755793) internal successors, (3313), 2320 states have internal predecessors, (3313), 655 states have call successors, (655), 206 states have call predecessors, (655), 231 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2022-11-22 02:18:00,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 4861 transitions. [2022-11-22 02:18:00,847 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 4861 transitions. Word has length 102 [2022-11-22 02:18:00,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:00,849 INFO L495 AbstractCegarLoop]: Abstraction has 3131 states and 4861 transitions. [2022-11-22 02:18:00,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 02:18:00,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 4861 transitions. [2022-11-22 02:18:00,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-22 02:18:00,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:00,856 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:18:00,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:01,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:01,064 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:01,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:01,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1292378790, now seen corresponding path program 1 times [2022-11-22 02:18:01,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:18:01,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232643353] [2022-11-22 02:18:01,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:01,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:18:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:18:01,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:18:01,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232643353] [2022-11-22 02:18:01,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232643353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:18:01,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395984899] [2022-11-22 02:18:01,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:01,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:01,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:01,270 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:18:01,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:18:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:01,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1386 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:18:01,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:18:01,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:18:01,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395984899] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:18:01,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:18:01,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-22 02:18:01,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994305607] [2022-11-22 02:18:01,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:18:01,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:18:01,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:18:01,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:18:01,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:18:01,703 INFO L87 Difference]: Start difference. First operand 3131 states and 4861 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 02:18:03,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:03,229 INFO L93 Difference]: Finished difference Result 8109 states and 13165 transitions. [2022-11-22 02:18:03,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:18:03,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 103 [2022-11-22 02:18:03,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:03,288 INFO L225 Difference]: With dead ends: 8109 [2022-11-22 02:18:03,289 INFO L226 Difference]: Without dead ends: 4993 [2022-11-22 02:18:03,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:18:03,318 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 623 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 2002 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:03,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 2002 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 02:18:03,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2022-11-22 02:18:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 4931. [2022-11-22 02:18:03,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 3556 states have (on average 1.4569741282339708) internal successors, (5181), 3678 states have internal predecessors, (5181), 1011 states have call successors, (1011), 324 states have call predecessors, (1011), 363 states have return successors, (1624), 1022 states have call predecessors, (1624), 994 states have call successors, (1624) [2022-11-22 02:18:03,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 7816 transitions. [2022-11-22 02:18:03,813 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 7816 transitions. Word has length 103 [2022-11-22 02:18:03,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:03,813 INFO L495 AbstractCegarLoop]: Abstraction has 4931 states and 7816 transitions. [2022-11-22 02:18:03,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 02:18:03,814 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 7816 transitions. [2022-11-22 02:18:03,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-22 02:18:03,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:03,820 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:18:03,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:04,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-22 02:18:04,029 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:04,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:04,030 INFO L85 PathProgramCache]: Analyzing trace with hash 450152023, now seen corresponding path program 1 times [2022-11-22 02:18:04,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:18:04,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126387113] [2022-11-22 02:18:04,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:04,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:18:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:18:04,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:18:04,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126387113] [2022-11-22 02:18:04,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126387113] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:18:04,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50562682] [2022-11-22 02:18:04,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:04,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:04,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:04,360 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:18:04,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:18:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:04,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:18:04,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:18:05,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:18:05,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50562682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:18:05,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:18:05,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-22 02:18:05,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059941755] [2022-11-22 02:18:05,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:18:05,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:18:05,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:18:05,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:18:05,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:18:05,045 INFO L87 Difference]: Start difference. First operand 4931 states and 7816 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 02:18:06,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:06,747 INFO L93 Difference]: Finished difference Result 11020 states and 18004 transitions. [2022-11-22 02:18:06,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:18:06,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 104 [2022-11-22 02:18:06,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:06,794 INFO L225 Difference]: With dead ends: 11020 [2022-11-22 02:18:06,795 INFO L226 Difference]: Without dead ends: 6104 [2022-11-22 02:18:06,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-22 02:18:06,830 INFO L413 NwaCegarLoop]: 864 mSDtfsCounter, 700 mSDsluCounter, 2393 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 3257 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:06,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 3257 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 02:18:06,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6104 states. [2022-11-22 02:18:07,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6104 to 6080. [2022-11-22 02:18:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6080 states, 4412 states have (on average 1.4320036264732547) internal successors, (6318), 4548 states have internal predecessors, (6318), 1174 states have call successors, (1174), 449 states have call predecessors, (1174), 493 states have return successors, (2598), 1175 states have call predecessors, (2598), 1145 states have call successors, (2598) [2022-11-22 02:18:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6080 states to 6080 states and 10090 transitions. [2022-11-22 02:18:07,469 INFO L78 Accepts]: Start accepts. Automaton has 6080 states and 10090 transitions. Word has length 104 [2022-11-22 02:18:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:07,470 INFO L495 AbstractCegarLoop]: Abstraction has 6080 states and 10090 transitions. [2022-11-22 02:18:07,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 02:18:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 6080 states and 10090 transitions. [2022-11-22 02:18:07,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-22 02:18:07,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:07,476 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:18:07,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:07,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:07,684 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:07,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:07,685 INFO L85 PathProgramCache]: Analyzing trace with hash 2008991990, now seen corresponding path program 1 times [2022-11-22 02:18:07,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:18:07,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965666581] [2022-11-22 02:18:07,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:07,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:18:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:18:07,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:18:07,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965666581] [2022-11-22 02:18:07,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965666581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:18:07,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539041803] [2022-11-22 02:18:07,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:07,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:07,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:07,943 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:18:07,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:18:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:08,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:18:08,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 02:18:08,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:18:08,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539041803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:18:08,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:18:08,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-22 02:18:08,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165503324] [2022-11-22 02:18:08,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:18:08,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:18:08,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:18:08,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:18:08,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:18:08,395 INFO L87 Difference]: Start difference. First operand 6080 states and 10090 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 02:18:09,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:09,276 INFO L93 Difference]: Finished difference Result 11905 states and 20369 transitions. [2022-11-22 02:18:09,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:18:09,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 108 [2022-11-22 02:18:09,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:09,332 INFO L225 Difference]: With dead ends: 11905 [2022-11-22 02:18:09,332 INFO L226 Difference]: Without dead ends: 5678 [2022-11-22 02:18:09,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:18:09,408 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 4 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1771 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:09,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1771 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:18:09,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5678 states. [2022-11-22 02:18:09,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5678 to 5479. [2022-11-22 02:18:09,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5479 states, 3922 states have (on average 1.4280979092299848) internal successors, (5601), 4050 states have internal predecessors, (5601), 1109 states have call successors, (1109), 413 states have call predecessors, (1109), 447 states have return successors, (2203), 1108 states have call predecessors, (2203), 1084 states have call successors, (2203) [2022-11-22 02:18:09,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5479 states to 5479 states and 8913 transitions. [2022-11-22 02:18:09,970 INFO L78 Accepts]: Start accepts. Automaton has 5479 states and 8913 transitions. Word has length 108 [2022-11-22 02:18:09,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:09,971 INFO L495 AbstractCegarLoop]: Abstraction has 5479 states and 8913 transitions. [2022-11-22 02:18:09,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 02:18:09,971 INFO L276 IsEmpty]: Start isEmpty. Operand 5479 states and 8913 transitions. [2022-11-22 02:18:09,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-22 02:18:09,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:09,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:18:09,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:10,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 02:18:10,196 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:10,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:10,196 INFO L85 PathProgramCache]: Analyzing trace with hash -447165813, now seen corresponding path program 1 times [2022-11-22 02:18:10,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:18:10,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309770007] [2022-11-22 02:18:10,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:10,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:18:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 02:18:10,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:18:10,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309770007] [2022-11-22 02:18:10,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309770007] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:18:10,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867429651] [2022-11-22 02:18:10,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:10,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:10,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:10,436 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:18:10,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:18:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:10,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:18:10,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:18:10,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:18:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:18:11,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867429651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:18:11,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [97972096] [2022-11-22 02:18:11,215 INFO L159 IcfgInterpreter]: Started Sifa with 96 locations of interest [2022-11-22 02:18:11,215 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:18:11,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:18:11,227 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:18:11,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:18:18,669 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-11-22 02:18:20,664 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-11-22 02:18:20,795 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 540 for LOIs [2022-11-22 02:18:23,629 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 788 for LOIs [2022-11-22 02:18:36,622 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 637 for LOIs [2022-11-22 02:18:37,092 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:18:49,401 WARN L233 SmtUtils]: Spent 7.36s on a formula simplification. DAG size of input: 637 DAG size of output: 573 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:18:56,898 WARN L233 SmtUtils]: Spent 7.27s on a formula simplification. DAG size of input: 677 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:19:16,420 WARN L233 SmtUtils]: Spent 10.06s on a formula simplification. DAG size of input: 788 DAG size of output: 654 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:19:33,649 WARN L233 SmtUtils]: Spent 16.70s on a formula simplification. DAG size of input: 862 DAG size of output: 773 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:20:06,818 WARN L233 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 612 DAG size of output: 584 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:20:12,986 WARN L233 SmtUtils]: Spent 5.77s on a formula simplification. DAG size of input: 621 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:20:12,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [97972096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:20:12,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:20:12,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [5, 6, 7] total 32 [2022-11-22 02:20:12,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35658672] [2022-11-22 02:20:12,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:20:12,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:20:12,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:12,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:20:12,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2022-11-22 02:20:12,997 INFO L87 Difference]: Start difference. First operand 5479 states and 8913 transitions. Second operand has 20 states, 15 states have (on average 4.533333333333333) internal successors, (68), 13 states have internal predecessors, (68), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-22 02:20:29,820 WARN L233 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 679 DAG size of output: 547 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:20:40,837 WARN L233 SmtUtils]: Spent 10.62s on a formula simplification. DAG size of input: 773 DAG size of output: 559 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:20:46,649 WARN L233 SmtUtils]: Spent 5.09s on a formula simplification. DAG size of input: 594 DAG size of output: 576 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:21:22,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:22,792 INFO L93 Difference]: Finished difference Result 10981 states and 17875 transitions. [2022-11-22 02:21:22,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-22 02:21:22,793 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 4.533333333333333) internal successors, (68), 13 states have internal predecessors, (68), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 110 [2022-11-22 02:21:22,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:22,837 INFO L225 Difference]: With dead ends: 10981 [2022-11-22 02:21:22,837 INFO L226 Difference]: Without dead ends: 5525 [2022-11-22 02:21:22,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 127.7s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 02:21:22,878 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 41 mSDsluCounter, 4413 mSDsCounter, 0 mSdLazyCounter, 5102 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 5037 SdHoareTripleChecker+Invalid, 5117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 5102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:22,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 5037 Invalid, 5117 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [15 Valid, 5102 Invalid, 0 Unknown, 0 Unchecked, 37.4s Time] [2022-11-22 02:21:22,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2022-11-22 02:21:23,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 5499. [2022-11-22 02:21:23,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5499 states, 3938 states have (on average 1.4268664296597258) internal successors, (5619), 4065 states have internal predecessors, (5619), 1111 states have call successors, (1111), 415 states have call predecessors, (1111), 449 states have return successors, (2205), 1111 states have call predecessors, (2205), 1086 states have call successors, (2205) [2022-11-22 02:21:23,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 8935 transitions. [2022-11-22 02:21:23,462 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 8935 transitions. Word has length 110 [2022-11-22 02:21:23,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:23,463 INFO L495 AbstractCegarLoop]: Abstraction has 5499 states and 8935 transitions. [2022-11-22 02:21:23,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 4.533333333333333) internal successors, (68), 13 states have internal predecessors, (68), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-22 02:21:23,464 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 8935 transitions. [2022-11-22 02:21:23,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-22 02:21:23,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:23,469 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:21:23,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:21:23,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:23,679 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:21:23,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:23,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1566295684, now seen corresponding path program 1 times [2022-11-22 02:21:23,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:23,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217836644] [2022-11-22 02:21:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:23,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 02:21:24,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:24,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217836644] [2022-11-22 02:21:24,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217836644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:24,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:24,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:21:24,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75578236] [2022-11-22 02:21:24,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:24,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:21:24,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:24,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:21:24,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:21:24,023 INFO L87 Difference]: Start difference. First operand 5499 states and 8935 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 02:21:25,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:25,159 INFO L93 Difference]: Finished difference Result 11386 states and 19601 transitions. [2022-11-22 02:21:25,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:21:25,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 113 [2022-11-22 02:21:25,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:25,213 INFO L225 Difference]: With dead ends: 11386 [2022-11-22 02:21:25,213 INFO L226 Difference]: Without dead ends: 6539 [2022-11-22 02:21:25,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:21:25,267 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 252 mSDsluCounter, 1853 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 2560 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:25,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 2560 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:21:25,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2022-11-22 02:21:26,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6323. [2022-11-22 02:21:26,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6323 states, 4401 states have (on average 1.4314928425357873) internal successors, (6300), 4639 states have internal predecessors, (6300), 1454 states have call successors, (1454), 415 states have call predecessors, (1454), 467 states have return successors, (2858), 1433 states have call predecessors, (2858), 1429 states have call successors, (2858) [2022-11-22 02:21:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6323 states to 6323 states and 10612 transitions. [2022-11-22 02:21:26,147 INFO L78 Accepts]: Start accepts. Automaton has 6323 states and 10612 transitions. Word has length 113 [2022-11-22 02:21:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:26,147 INFO L495 AbstractCegarLoop]: Abstraction has 6323 states and 10612 transitions. [2022-11-22 02:21:26,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 02:21:26,148 INFO L276 IsEmpty]: Start isEmpty. Operand 6323 states and 10612 transitions. [2022-11-22 02:21:26,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-22 02:21:26,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:26,153 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:21:26,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 02:21:26,154 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:21:26,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:26,154 INFO L85 PathProgramCache]: Analyzing trace with hash 51392960, now seen corresponding path program 1 times [2022-11-22 02:21:26,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:26,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109427364] [2022-11-22 02:21:26,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:26,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:21:26,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:26,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109427364] [2022-11-22 02:21:26,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109427364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:21:26,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271713633] [2022-11-22 02:21:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:26,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:26,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:21:26,379 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:21:26,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8edb74e-9bbb-49a8-bd7a-62a05f88c86b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:21:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:26,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:21:26,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:21:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 02:21:26,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:21:27,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271713633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:21:27,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1918231590] [2022-11-22 02:21:27,084 INFO L159 IcfgInterpreter]: Started Sifa with 101 locations of interest [2022-11-22 02:21:27,085 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:21:27,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:21:27,085 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:21:27,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:21:32,318 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-11-22 02:23:12,296 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 461 for LOIs [2022-11-22 02:23:12,519 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 457 for LOIs [2022-11-22 02:23:12,638 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 449 for LOIs [2022-11-22 02:23:12,747 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 87 for LOIs [2022-11-22 02:23:12,868 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 82 for LOIs [2022-11-22 02:23:12,877 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-11-22 02:23:12,946 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 540 for LOIs [2022-11-22 02:23:15,594 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 788 for LOIs [2022-11-22 02:29:45,771 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 637 for LOIs [2022-11-22 02:29:46,314 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:29:51,555 WARN L233 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 514 DAG size of output: 509 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:30:00,096 WARN L233 SmtUtils]: Spent 8.18s on a formula simplification. DAG size of input: 637 DAG size of output: 573 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:30:07,998 WARN L233 SmtUtils]: Spent 7.64s on a formula simplification. DAG size of input: 677 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:30:28,163 WARN L233 SmtUtils]: Spent 10.44s on a formula simplification. DAG size of input: 788 DAG size of output: 654 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:31:22,146 WARN L233 SmtUtils]: Spent 48.26s on a formula simplification. DAG size of input: 1409 DAG size of output: 630 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)