./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh --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 4fa4154afcc1fa94c570756c4d3485a9415aeef22801b46450f13cd61ecf8230 --- 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-2329fc7 [2022-12-14 11:54:45,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:54:45,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:54:45,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:54:45,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:54:45,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:54:45,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:54:45,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:54:45,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:54:45,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:54:45,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:54:45,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:54:45,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:54:45,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:54:45,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:54:45,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:54:45,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:54:45,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:54:45,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:54:45,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:54:45,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:54:45,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:54:45,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:54:45,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:54:45,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:54:45,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:54:45,987 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:54:45,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:54:45,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:54:45,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:54:45,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:54:45,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:54:45,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:54:45,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:54:45,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:54:45,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:54:45,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:54:45,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:54:45,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:54:45,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:54:45,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:54:45,996 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:54:46,009 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:54:46,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:54:46,010 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:54:46,010 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:54:46,010 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:54:46,010 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:54:46,010 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:54:46,010 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:54:46,011 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:54:46,011 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:54:46,011 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:54:46,011 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:54:46,011 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:54:46,011 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:54:46,011 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:54:46,011 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:54:46,011 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:54:46,011 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:54:46,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:54:46,012 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:54:46,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:54:46,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:54:46,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:54:46,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:54:46,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:54:46,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:54:46,013 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:54:46,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:54:46,013 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:54:46,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:54:46,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:54:46,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:54:46,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:54:46,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:54:46,013 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:54:46,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:54:46,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:54:46,014 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:54:46,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:54:46,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:54:46,014 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:54:46,014 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_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fa4154afcc1fa94c570756c4d3485a9415aeef22801b46450f13cd61ecf8230 [2022-12-14 11:54:46,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:54:46,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:54:46,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:54:46,216 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:54:46,216 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:54:46,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c [2022-12-14 11:54:48,722 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:54:48,926 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:54:48,926 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c [2022-12-14 11:54:48,940 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/data/6739911b4/282c6bad67cc4fecb4f1324845994a99/FLAGda6d2c136 [2022-12-14 11:54:49,302 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/data/6739911b4/282c6bad67cc4fecb4f1324845994a99 [2022-12-14 11:54:49,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:54:49,308 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:54:49,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:54:49,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:54:49,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:54:49,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:54:49" (1/1) ... [2022-12-14 11:54:49,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@715b22d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:54:49, skipping insertion in model container [2022-12-14 11:54:49,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:54:49" (1/1) ... [2022-12-14 11:54:49,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:54:49,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:54:49,559 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_02aa2436-0fa1-4329-9b7a-a2706ac09898/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c[14523,14536] [2022-12-14 11:54:49,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:54:49,681 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:54:49,704 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_02aa2436-0fa1-4329-9b7a-a2706ac09898/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c[14523,14536] [2022-12-14 11:54:49,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:54:49,771 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:54:49,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:54:49 WrapperNode [2022-12-14 11:54:49,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:54:49,773 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:54:49,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:54:49,773 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:54:49,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:54:49" (1/1) ... [2022-12-14 11:54:49,794 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:54:49" (1/1) ... [2022-12-14 11:54:49,822 INFO L138 Inliner]: procedures = 93, calls = 353, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 949 [2022-12-14 11:54:49,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:54:49,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:54:49,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:54:49,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:54:49,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:54:49" (1/1) ... [2022-12-14 11:54:49,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:54:49" (1/1) ... [2022-12-14 11:54:49,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:54:49" (1/1) ... [2022-12-14 11:54:49,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:54:49" (1/1) ... [2022-12-14 11:54:49,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:54:49" (1/1) ... [2022-12-14 11:54:49,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:54:49" (1/1) ... [2022-12-14 11:54:49,858 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:54:49" (1/1) ... [2022-12-14 11:54:49,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:54:49" (1/1) ... [2022-12-14 11:54:49,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:54:49,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:54:49,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:54:49,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:54:49,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:54:49" (1/1) ... [2022-12-14 11:54:49,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:54:49,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:54:49,897 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:54:49,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:54:49,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:54:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-12-14 11:54:49,933 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-12-14 11:54:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 11:54:49,933 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 11:54:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 11:54:49,933 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 11:54:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 11:54:49,934 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 11:54:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 11:54:49,934 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 11:54:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 11:54:49,934 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 11:54:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 11:54:49,934 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 11:54:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 11:54:49,935 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 11:54:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 11:54:49,935 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 11:54:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 11:54:49,935 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 11:54:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 11:54:49,935 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 11:54:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 11:54:49,936 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 11:54:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 11:54:49,936 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 11:54:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 11:54:49,936 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 11:54:49,937 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-12-14 11:54:49,937 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-12-14 11:54:49,937 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 11:54:49,937 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 11:54:49,937 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-12-14 11:54:49,937 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-12-14 11:54:49,937 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 11:54:49,938 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 11:54:49,938 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 11:54:49,938 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 11:54:49,938 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 11:54:49,938 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 11:54:49,938 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 11:54:49,938 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 11:54:49,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:54:49,939 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 11:54:49,939 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 11:54:49,939 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 11:54:49,939 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 11:54:49,939 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 11:54:49,939 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 11:54:49,940 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 11:54:49,940 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 11:54:49,940 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-12-14 11:54:49,940 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-12-14 11:54:49,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:54:49,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:54:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 11:54:49,941 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 11:54:50,059 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:54:50,061 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:54:50,768 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:54:51,265 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:54:51,265 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 11:54:51,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:54:51 BoogieIcfgContainer [2022-12-14 11:54:51,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:54:51,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:54:51,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:54:51,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:54:51,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:54:49" (1/3) ... [2022-12-14 11:54:51,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1329d9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:54:51, skipping insertion in model container [2022-12-14 11:54:51,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:54:49" (2/3) ... [2022-12-14 11:54:51,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1329d9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:54:51, skipping insertion in model container [2022-12-14 11:54:51,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:54:51" (3/3) ... [2022-12-14 11:54:51,275 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product30.cil.c [2022-12-14 11:54:51,304 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:54:51,304 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:54:51,355 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:54:51,360 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;@3bdf94b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:54:51,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:54:51,366 INFO L276 IsEmpty]: Start isEmpty. Operand has 411 states, 274 states have (on average 1.572992700729927) internal successors, (431), 294 states have internal predecessors, (431), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2022-12-14 11:54:51,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 11:54:51,375 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:54:51,376 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:54:51,376 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:54:51,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:54:51,380 INFO L85 PathProgramCache]: Analyzing trace with hash 119172305, now seen corresponding path program 1 times [2022-12-14 11:54:51,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:54:51,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337960807] [2022-12-14 11:54:51,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:54:51,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:54:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:54:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:54:51,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:54:51,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337960807] [2022-12-14 11:54:51,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337960807] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:54:51,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:54:51,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:54:51,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214359094] [2022-12-14 11:54:51,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:54:51,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:54:51,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:54:51,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:54:51,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:54:51,904 INFO L87 Difference]: Start difference. First operand has 411 states, 274 states have (on average 1.572992700729927) internal successors, (431), 294 states have internal predecessors, (431), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:54:52,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:54:52,717 INFO L93 Difference]: Finished difference Result 1171 states and 1873 transitions. [2022-12-14 11:54:52,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:54:52,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 49 [2022-12-14 11:54:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:54:52,731 INFO L225 Difference]: With dead ends: 1171 [2022-12-14 11:54:52,732 INFO L226 Difference]: Without dead ends: 762 [2022-12-14 11:54:52,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:54:52,740 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 545 mSDsluCounter, 2427 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 3128 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:54:52,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 3128 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:54:52,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-12-14 11:54:52,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 754. [2022-12-14 11:54:52,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 505 states have (on average 1.500990099009901) internal successors, (758), 539 states have internal predecessors, (758), 200 states have call successors, (200), 51 states have call predecessors, (200), 48 states have return successors, (203), 190 states have call predecessors, (203), 196 states have call successors, (203) [2022-12-14 11:54:52,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1161 transitions. [2022-12-14 11:54:52,849 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1161 transitions. Word has length 49 [2022-12-14 11:54:52,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:54:52,850 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 1161 transitions. [2022-12-14 11:54:52,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:54:52,850 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1161 transitions. [2022-12-14 11:54:52,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 11:54:52,852 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:54:52,853 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:54:52,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:54:52,853 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:54:52,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:54:52,854 INFO L85 PathProgramCache]: Analyzing trace with hash -378550204, now seen corresponding path program 1 times [2022-12-14 11:54:52,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:54:52,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897144788] [2022-12-14 11:54:52,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:54:52,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:54:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:54:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:54:53,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:54:53,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897144788] [2022-12-14 11:54:53,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897144788] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:54:53,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:54:53,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:54:53,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994355977] [2022-12-14 11:54:53,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:54:53,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:54:53,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:54:53,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:54:53,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:54:53,076 INFO L87 Difference]: Start difference. First operand 754 states and 1161 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 11:54:53,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:54:53,340 INFO L93 Difference]: Finished difference Result 2232 states and 3471 transitions. [2022-12-14 11:54:53,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:54:53,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2022-12-14 11:54:53,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:54:53,349 INFO L225 Difference]: With dead ends: 2232 [2022-12-14 11:54:53,349 INFO L226 Difference]: Without dead ends: 1491 [2022-12-14 11:54:53,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:54:53,353 INFO L413 NwaCegarLoop]: 704 mSDtfsCounter, 602 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:54:53,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 1285 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:54:53,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2022-12-14 11:54:53,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1419. [2022-12-14 11:54:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 979 states have (on average 1.5148110316649643) internal successors, (1483), 1031 states have internal predecessors, (1483), 353 states have call successors, (353), 91 states have call predecessors, (353), 86 states have return successors, (373), 324 states have call predecessors, (373), 347 states have call successors, (373) [2022-12-14 11:54:53,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 2209 transitions. [2022-12-14 11:54:53,422 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 2209 transitions. Word has length 50 [2022-12-14 11:54:53,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:54:53,422 INFO L495 AbstractCegarLoop]: Abstraction has 1419 states and 2209 transitions. [2022-12-14 11:54:53,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 11:54:53,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 2209 transitions. [2022-12-14 11:54:53,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 11:54:53,425 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:54:53,425 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:54:53,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:54:53,426 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:54:53,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:54:53,426 INFO L85 PathProgramCache]: Analyzing trace with hash -854458103, now seen corresponding path program 1 times [2022-12-14 11:54:53,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:54:53,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564431143] [2022-12-14 11:54:53,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:54:53,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:54:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:54:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:54:53,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:54:53,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564431143] [2022-12-14 11:54:53,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564431143] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:54:53,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:54:53,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:54:53,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278185797] [2022-12-14 11:54:53,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:54:53,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:54:53,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:54:53,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:54:53,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:54:53,716 INFO L87 Difference]: Start difference. First operand 1419 states and 2209 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 11:54:54,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:54:54,425 INFO L93 Difference]: Finished difference Result 3701 states and 5970 transitions. [2022-12-14 11:54:54,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:54:54,426 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 86 [2022-12-14 11:54:54,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:54:54,442 INFO L225 Difference]: With dead ends: 3701 [2022-12-14 11:54:54,442 INFO L226 Difference]: Without dead ends: 2294 [2022-12-14 11:54:54,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:54:54,452 INFO L413 NwaCegarLoop]: 776 mSDtfsCounter, 674 mSDsluCounter, 2679 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 3455 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:54:54,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 3455 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:54:54,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2022-12-14 11:54:54,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 2080. [2022-12-14 11:54:54,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 1439 states have (on average 1.507991660875608) internal successors, (2170), 1523 states have internal predecessors, (2170), 512 states have call successors, (512), 135 states have call predecessors, (512), 128 states have return successors, (581), 464 states have call predecessors, (581), 504 states have call successors, (581) [2022-12-14 11:54:54,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 3263 transitions. [2022-12-14 11:54:54,555 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 3263 transitions. Word has length 86 [2022-12-14 11:54:54,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:54:54,555 INFO L495 AbstractCegarLoop]: Abstraction has 2080 states and 3263 transitions. [2022-12-14 11:54:54,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 11:54:54,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 3263 transitions. [2022-12-14 11:54:54,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 11:54:54,557 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:54:54,558 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:54:54,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 11:54:54,558 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:54:54,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:54:54,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1294443877, now seen corresponding path program 1 times [2022-12-14 11:54:54,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:54:54,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778341392] [2022-12-14 11:54:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:54:54,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:54:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:54:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:54:54,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:54:54,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778341392] [2022-12-14 11:54:54,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778341392] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:54:54,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623886557] [2022-12-14 11:54:54,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:54:54,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:54:54,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:54:54,747 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:54:54,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:54:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:54:55,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 1807 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:54:55,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:54:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:54:55,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:54:55,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623886557] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:54:55,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:54:55,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 11:54:55,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157124168] [2022-12-14 11:54:55,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:54:55,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:54:55,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:54:55,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:54:55,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:54:55,107 INFO L87 Difference]: Start difference. First operand 2080 states and 3263 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 11:54:55,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:54:55,338 INFO L93 Difference]: Finished difference Result 5950 states and 9595 transitions. [2022-12-14 11:54:55,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:54:55,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2022-12-14 11:54:55,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:54:55,359 INFO L225 Difference]: With dead ends: 5950 [2022-12-14 11:54:55,360 INFO L226 Difference]: Without dead ends: 3882 [2022-12-14 11:54:55,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:54:55,372 INFO L413 NwaCegarLoop]: 684 mSDtfsCounter, 565 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:54:55,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1192 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:54:55,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2022-12-14 11:54:55,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3764. [2022-12-14 11:54:55,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 2621 states have (on average 1.5215566577642121) internal successors, (3988), 2791 states have internal predecessors, (3988), 903 states have call successors, (903), 240 states have call predecessors, (903), 239 states have return successors, (1072), 818 states have call predecessors, (1072), 895 states have call successors, (1072) [2022-12-14 11:54:55,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 5963 transitions. [2022-12-14 11:54:55,555 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 5963 transitions. Word has length 86 [2022-12-14 11:54:55,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:54:55,555 INFO L495 AbstractCegarLoop]: Abstraction has 3764 states and 5963 transitions. [2022-12-14 11:54:55,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 11:54:55,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 5963 transitions. [2022-12-14 11:54:55,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 11:54:55,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:54:55,558 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:54:55,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:54:55,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:54:55,759 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:54:55,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:54:55,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1255439370, now seen corresponding path program 1 times [2022-12-14 11:54:55,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:54:55,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080224379] [2022-12-14 11:54:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:54:55,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:54:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:54:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:54:55,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:54:55,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080224379] [2022-12-14 11:54:55,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080224379] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:54:55,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811307199] [2022-12-14 11:54:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:54:55,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:54:55,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:54:55,938 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:54:55,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:54:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:54:56,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 1807 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:54:56,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:54:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:54:56,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:54:56,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811307199] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:54:56,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:54:56,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 11:54:56,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009480364] [2022-12-14 11:54:56,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:54:56,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:54:56,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:54:56,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:54:56,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:54:56,294 INFO L87 Difference]: Start difference. First operand 3764 states and 5963 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 11:54:56,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:54:56,598 INFO L93 Difference]: Finished difference Result 8443 states and 13531 transitions. [2022-12-14 11:54:56,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:54:56,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 85 [2022-12-14 11:54:56,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:54:56,618 INFO L225 Difference]: With dead ends: 8443 [2022-12-14 11:54:56,618 INFO L226 Difference]: Without dead ends: 4691 [2022-12-14 11:54:56,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:54:56,633 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 565 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:54:56,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1225 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:54:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2022-12-14 11:54:56,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 4627. [2022-12-14 11:54:56,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 3233 states have (on average 1.5310856789359728) internal successors, (4950), 3446 states have internal predecessors, (4950), 1100 states have call successors, (1100), 291 states have call predecessors, (1100), 293 states have return successors, (1306), 998 states have call predecessors, (1306), 1092 states have call successors, (1306) [2022-12-14 11:54:56,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 7356 transitions. [2022-12-14 11:54:56,799 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 7356 transitions. Word has length 85 [2022-12-14 11:54:56,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:54:56,799 INFO L495 AbstractCegarLoop]: Abstraction has 4627 states and 7356 transitions. [2022-12-14 11:54:56,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 11:54:56,799 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 7356 transitions. [2022-12-14 11:54:56,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 11:54:56,802 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:54:56,802 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 11:54:56,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:54:57,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:54:57,003 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:54:57,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:54:57,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1662369120, now seen corresponding path program 1 times [2022-12-14 11:54:57,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:54:57,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469469936] [2022-12-14 11:54:57,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:54:57,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:54:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:54:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:54:57,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:54:57,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469469936] [2022-12-14 11:54:57,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469469936] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:54:57,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468564151] [2022-12-14 11:54:57,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:54:57,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:54:57,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:54:57,507 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:54:57,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:54:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:54:57,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:54:57,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:54:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:54:57,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:54:57,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468564151] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:54:57,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:54:57,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-12-14 11:54:57,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017013652] [2022-12-14 11:54:57,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:54:57,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:54:57,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:54:57,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:54:57,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:54:57,848 INFO L87 Difference]: Start difference. First operand 4627 states and 7356 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2022-12-14 11:54:58,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:54:58,319 INFO L93 Difference]: Finished difference Result 9113 states and 14772 transitions. [2022-12-14 11:54:58,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:54:58,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 93 [2022-12-14 11:54:58,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:54:58,350 INFO L225 Difference]: With dead ends: 9113 [2022-12-14 11:54:58,350 INFO L226 Difference]: Without dead ends: 5707 [2022-12-14 11:54:58,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:54:58,365 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 177 mSDsluCounter, 1786 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2426 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:54:58,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2426 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:54:58,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5707 states. [2022-12-14 11:54:58,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5707 to 5163. [2022-12-14 11:54:58,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5163 states, 3539 states have (on average 1.5241593670528397) internal successors, (5394), 3825 states have internal predecessors, (5394), 1323 states have call successors, (1323), 291 states have call predecessors, (1323), 300 states have return successors, (1557), 1197 states have call predecessors, (1557), 1315 states have call successors, (1557) [2022-12-14 11:54:58,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 8274 transitions. [2022-12-14 11:54:58,572 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 8274 transitions. Word has length 93 [2022-12-14 11:54:58,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:54:58,573 INFO L495 AbstractCegarLoop]: Abstraction has 5163 states and 8274 transitions. [2022-12-14 11:54:58,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2022-12-14 11:54:58,573 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 8274 transitions. [2022-12-14 11:54:58,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 11:54:58,575 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:54:58,575 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:54:58,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:54:58,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 11:54:58,776 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:54:58,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:54:58,778 INFO L85 PathProgramCache]: Analyzing trace with hash -951343344, now seen corresponding path program 1 times [2022-12-14 11:54:58,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:54:58,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320199620] [2022-12-14 11:54:58,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:54:58,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:54:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:54:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 11:54:59,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:54:59,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320199620] [2022-12-14 11:54:59,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320199620] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:54:59,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576881519] [2022-12-14 11:54:59,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:54:59,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:54:59,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:54:59,291 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:54:59,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:54:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:54:59,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:54:59,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:54:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:54:59,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:55:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:55:00,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576881519] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:00,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:55:00,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 22 [2022-12-14 11:55:00,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032819317] [2022-12-14 11:55:00,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:55:00,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 11:55:00,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:55:00,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 11:55:00,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-12-14 11:55:00,110 INFO L87 Difference]: Start difference. First operand 5163 states and 8274 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-12-14 11:55:02,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:55:02,079 INFO L93 Difference]: Finished difference Result 9851 states and 15893 transitions. [2022-12-14 11:55:02,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 11:55:02,080 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 94 [2022-12-14 11:55:02,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:55:02,106 INFO L225 Difference]: With dead ends: 9851 [2022-12-14 11:55:02,106 INFO L226 Difference]: Without dead ends: 5933 [2022-12-14 11:55:02,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 175 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2022-12-14 11:55:02,123 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 1509 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 2516 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1597 SdHoareTripleChecker+Valid, 2441 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 2516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:55:02,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1597 Valid, 2441 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 2516 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 11:55:02,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5933 states. [2022-12-14 11:55:02,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5933 to 4906. [2022-12-14 11:55:02,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4906 states, 3424 states have (on average 1.5073014018691588) internal successors, (5161), 3637 states have internal predecessors, (5161), 1140 states have call successors, (1140), 297 states have call predecessors, (1140), 341 states have return successors, (1466), 1074 states have call predecessors, (1466), 1132 states have call successors, (1466) [2022-12-14 11:55:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4906 states to 4906 states and 7767 transitions. [2022-12-14 11:55:02,374 INFO L78 Accepts]: Start accepts. Automaton has 4906 states and 7767 transitions. Word has length 94 [2022-12-14 11:55:02,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:55:02,374 INFO L495 AbstractCegarLoop]: Abstraction has 4906 states and 7767 transitions. [2022-12-14 11:55:02,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-12-14 11:55:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 4906 states and 7767 transitions. [2022-12-14 11:55:02,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 11:55:02,377 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:55:02,377 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:55:02,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 11:55:02,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 11:55:02,578 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:55:02,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:55:02,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1015073448, now seen corresponding path program 1 times [2022-12-14 11:55:02,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:55:02,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571280303] [2022-12-14 11:55:02,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:02,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:55:02,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 11:55:02,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:55:02,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571280303] [2022-12-14 11:55:02,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571280303] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:02,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449774167] [2022-12-14 11:55:02,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:02,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:02,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:55:02,934 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:55:02,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:55:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:03,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:55:03,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 11:55:03,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:55:03,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449774167] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:55:03,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:55:03,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-12-14 11:55:03,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090091689] [2022-12-14 11:55:03,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:55:03,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:55:03,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:55:03,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:55:03,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:55:03,226 INFO L87 Difference]: Start difference. First operand 4906 states and 7767 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 11:55:03,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:55:03,642 INFO L93 Difference]: Finished difference Result 9107 states and 14842 transitions. [2022-12-14 11:55:03,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:55:03,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 98 [2022-12-14 11:55:03,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:55:03,664 INFO L225 Difference]: With dead ends: 9107 [2022-12-14 11:55:03,664 INFO L226 Difference]: Without dead ends: 5446 [2022-12-14 11:55:03,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:55:03,677 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 219 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1621 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:55:03,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1621 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:55:03,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5446 states. [2022-12-14 11:55:03,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5446 to 5446. [2022-12-14 11:55:03,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5446 states, 3943 states have (on average 1.521683996956632) internal successors, (6000), 4177 states have internal predecessors, (6000), 1140 states have call successors, (1140), 297 states have call predecessors, (1140), 362 states have return successors, (1522), 1074 states have call predecessors, (1522), 1132 states have call successors, (1522) [2022-12-14 11:55:03,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5446 states to 5446 states and 8662 transitions. [2022-12-14 11:55:03,910 INFO L78 Accepts]: Start accepts. Automaton has 5446 states and 8662 transitions. Word has length 98 [2022-12-14 11:55:03,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:55:03,910 INFO L495 AbstractCegarLoop]: Abstraction has 5446 states and 8662 transitions. [2022-12-14 11:55:03,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 11:55:03,911 INFO L276 IsEmpty]: Start isEmpty. Operand 5446 states and 8662 transitions. [2022-12-14 11:55:03,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 11:55:03,913 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:55:03,914 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:55:03,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 11:55:04,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:04,115 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:55:04,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:55:04,116 INFO L85 PathProgramCache]: Analyzing trace with hash -2060550827, now seen corresponding path program 1 times [2022-12-14 11:55:04,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:55:04,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593499754] [2022-12-14 11:55:04,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:04,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:55:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 11:55:04,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:55:04,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593499754] [2022-12-14 11:55:04,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593499754] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:04,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139883313] [2022-12-14 11:55:04,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:04,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:04,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:55:04,516 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:55:04,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:55:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:04,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 11:55:04,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:55:04,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:55:04,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139883313] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:55:04,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:55:04,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2022-12-14 11:55:04,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387934130] [2022-12-14 11:55:04,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:55:04,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:55:04,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:55:04,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:55:04,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:55:04,825 INFO L87 Difference]: Start difference. First operand 5446 states and 8662 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 11:55:05,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:55:05,164 INFO L93 Difference]: Finished difference Result 11736 states and 18703 transitions. [2022-12-14 11:55:05,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:55:05,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2022-12-14 11:55:05,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:55:05,186 INFO L225 Difference]: With dead ends: 11736 [2022-12-14 11:55:05,186 INFO L226 Difference]: Without dead ends: 6302 [2022-12-14 11:55:05,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:55:05,204 INFO L413 NwaCegarLoop]: 694 mSDtfsCounter, 423 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1760 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:55:05,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 1760 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:55:05,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6302 states. [2022-12-14 11:55:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6302 to 6141. [2022-12-14 11:55:05,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6141 states, 4427 states have (on average 1.497854077253219) internal successors, (6631), 4659 states have internal predecessors, (6631), 1276 states have call successors, (1276), 360 states have call predecessors, (1276), 437 states have return successors, (1778), 1224 states have call predecessors, (1778), 1265 states have call successors, (1778) [2022-12-14 11:55:05,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6141 states to 6141 states and 9685 transitions. [2022-12-14 11:55:05,557 INFO L78 Accepts]: Start accepts. Automaton has 6141 states and 9685 transitions. Word has length 97 [2022-12-14 11:55:05,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:55:05,557 INFO L495 AbstractCegarLoop]: Abstraction has 6141 states and 9685 transitions. [2022-12-14 11:55:05,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 11:55:05,558 INFO L276 IsEmpty]: Start isEmpty. Operand 6141 states and 9685 transitions. [2022-12-14 11:55:05,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 11:55:05,560 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:55:05,561 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:55:05,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 11:55:05,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:05,762 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:55:05,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:55:05,764 INFO L85 PathProgramCache]: Analyzing trace with hash 505473002, now seen corresponding path program 1 times [2022-12-14 11:55:05,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:55:05,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474096762] [2022-12-14 11:55:05,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:05,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:55:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 11:55:06,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:55:06,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474096762] [2022-12-14 11:55:06,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474096762] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:06,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429986193] [2022-12-14 11:55:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:06,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:06,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:55:06,150 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:55:06,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:55:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:06,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 11:55:06,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:55:06,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:55:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 11:55:06,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429986193] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:06,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:55:06,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 9] total 21 [2022-12-14 11:55:06,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646086695] [2022-12-14 11:55:06,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:55:06,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 11:55:06,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:55:06,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 11:55:06,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-12-14 11:55:06,921 INFO L87 Difference]: Start difference. First operand 6141 states and 9685 transitions. Second operand has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 11:55:10,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:55:10,069 INFO L93 Difference]: Finished difference Result 17742 states and 30849 transitions. [2022-12-14 11:55:10,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 11:55:10,070 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 98 [2022-12-14 11:55:10,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:55:10,134 INFO L225 Difference]: With dead ends: 17742 [2022-12-14 11:55:10,134 INFO L226 Difference]: Without dead ends: 13587 [2022-12-14 11:55:10,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 11:55:10,155 INFO L413 NwaCegarLoop]: 719 mSDtfsCounter, 2502 mSDsluCounter, 2800 mSDsCounter, 0 mSdLazyCounter, 3428 mSolverCounterSat, 1146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2600 SdHoareTripleChecker+Valid, 3519 SdHoareTripleChecker+Invalid, 4574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1146 IncrementalHoareTripleChecker+Valid, 3428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:55:10,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2600 Valid, 3519 Invalid, 4574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1146 Valid, 3428 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 11:55:10,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13587 states. [2022-12-14 11:55:10,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13587 to 12128. [2022-12-14 11:55:10,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12128 states, 8883 states have (on average 1.5074862096138693) internal successors, (13391), 9288 states have internal predecessors, (13391), 2354 states have call successors, (2354), 684 states have call predecessors, (2354), 890 states have return successors, (4235), 2315 states have call predecessors, (4235), 2337 states have call successors, (4235) [2022-12-14 11:55:10,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12128 states to 12128 states and 19980 transitions. [2022-12-14 11:55:10,889 INFO L78 Accepts]: Start accepts. Automaton has 12128 states and 19980 transitions. Word has length 98 [2022-12-14 11:55:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:55:10,889 INFO L495 AbstractCegarLoop]: Abstraction has 12128 states and 19980 transitions. [2022-12-14 11:55:10,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 11:55:10,889 INFO L276 IsEmpty]: Start isEmpty. Operand 12128 states and 19980 transitions. [2022-12-14 11:55:10,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 11:55:10,892 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:55:10,892 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:55:10,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 11:55:11,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:11,093 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:55:11,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:55:11,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1636803934, now seen corresponding path program 1 times [2022-12-14 11:55:11,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:55:11,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45945623] [2022-12-14 11:55:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:11,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:55:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:11,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 11:55:11,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:55:11,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45945623] [2022-12-14 11:55:11,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45945623] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:11,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319379592] [2022-12-14 11:55:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:11,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:11,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:55:11,408 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:55:11,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 11:55:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:11,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 1855 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:55:11,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:55:11,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:55:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:55:11,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319379592] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:11,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:55:11,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 17 [2022-12-14 11:55:11,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290644768] [2022-12-14 11:55:11,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:55:11,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:55:11,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:55:11,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:55:11,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-12-14 11:55:11,907 INFO L87 Difference]: Start difference. First operand 12128 states and 19980 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-12-14 11:55:13,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:55:13,768 INFO L93 Difference]: Finished difference Result 23755 states and 39714 transitions. [2022-12-14 11:55:13,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:55:13,769 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 101 [2022-12-14 11:55:13,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:55:13,812 INFO L225 Difference]: With dead ends: 23755 [2022-12-14 11:55:13,812 INFO L226 Difference]: Without dead ends: 13613 [2022-12-14 11:55:13,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 193 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-12-14 11:55:13,843 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 1203 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1301 SdHoareTripleChecker+Valid, 2086 SdHoareTripleChecker+Invalid, 2174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:55:13,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1301 Valid, 2086 Invalid, 2174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 11:55:13,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13613 states. [2022-12-14 11:55:14,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13613 to 12116. [2022-12-14 11:55:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12116 states, 8883 states have (on average 1.5074862096138693) internal successors, (13391), 9276 states have internal predecessors, (13391), 2342 states have call successors, (2342), 684 states have call predecessors, (2342), 890 states have return successors, (4199), 2315 states have call predecessors, (4199), 2325 states have call successors, (4199) [2022-12-14 11:55:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12116 states to 12116 states and 19932 transitions. [2022-12-14 11:55:14,576 INFO L78 Accepts]: Start accepts. Automaton has 12116 states and 19932 transitions. Word has length 101 [2022-12-14 11:55:14,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:55:14,576 INFO L495 AbstractCegarLoop]: Abstraction has 12116 states and 19932 transitions. [2022-12-14 11:55:14,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-12-14 11:55:14,576 INFO L276 IsEmpty]: Start isEmpty. Operand 12116 states and 19932 transitions. [2022-12-14 11:55:14,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 11:55:14,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:55:14,580 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:55:14,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 11:55:14,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 11:55:14,781 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:55:14,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:55:14,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1295638179, now seen corresponding path program 1 times [2022-12-14 11:55:14,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:55:14,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621921359] [2022-12-14 11:55:14,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:14,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:55:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 11:55:15,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:55:15,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621921359] [2022-12-14 11:55:15,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621921359] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:15,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517809944] [2022-12-14 11:55:15,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:15,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:15,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:55:15,137 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:55:15,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:55:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:15,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 1965 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:55:15,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:55:15,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:55:15,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517809944] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:55:15,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:55:15,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-12-14 11:55:15,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455929305] [2022-12-14 11:55:15,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:55:15,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:55:15,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:55:15,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:55:15,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:55:15,395 INFO L87 Difference]: Start difference. First operand 12116 states and 19932 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 11:55:16,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:55:16,185 INFO L93 Difference]: Finished difference Result 23527 states and 40077 transitions. [2022-12-14 11:55:16,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:55:16,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 131 [2022-12-14 11:55:16,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:55:16,246 INFO L225 Difference]: With dead ends: 23527 [2022-12-14 11:55:16,246 INFO L226 Difference]: Without dead ends: 12680 [2022-12-14 11:55:16,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:55:16,296 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 2 mSDsluCounter, 3005 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3614 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:55:16,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3614 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:55:16,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12680 states. [2022-12-14 11:55:16,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12680 to 12554. [2022-12-14 11:55:16,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12554 states, 9159 states have (on average 1.492193470902937) internal successors, (13667), 9630 states have internal predecessors, (13667), 2342 states have call successors, (2342), 684 states have call predecessors, (2342), 1052 states have return successors, (5135), 2399 states have call predecessors, (5135), 2325 states have call successors, (5135) [2022-12-14 11:55:16,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12554 states to 12554 states and 21144 transitions. [2022-12-14 11:55:16,932 INFO L78 Accepts]: Start accepts. Automaton has 12554 states and 21144 transitions. Word has length 131 [2022-12-14 11:55:16,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:55:16,933 INFO L495 AbstractCegarLoop]: Abstraction has 12554 states and 21144 transitions. [2022-12-14 11:55:16,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 11:55:16,933 INFO L276 IsEmpty]: Start isEmpty. Operand 12554 states and 21144 transitions. [2022-12-14 11:55:16,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 11:55:16,936 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:55:16,936 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:55:16,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 11:55:17,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 11:55:17,137 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:55:17,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:55:17,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1124549805, now seen corresponding path program 1 times [2022-12-14 11:55:17,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:55:17,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789573676] [2022-12-14 11:55:17,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:17,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:55:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 11:55:17,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:55:17,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789573676] [2022-12-14 11:55:17,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789573676] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:17,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779554715] [2022-12-14 11:55:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:17,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:17,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:55:17,486 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:55:17,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 11:55:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:17,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 1964 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:55:17,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:55:17,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:55:17,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779554715] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:55:17,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:55:17,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-12-14 11:55:17,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826994899] [2022-12-14 11:55:17,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:55:17,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:55:17,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:55:17,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:55:17,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:55:17,813 INFO L87 Difference]: Start difference. First operand 12554 states and 21144 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 11:55:18,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:55:18,641 INFO L93 Difference]: Finished difference Result 24175 states and 41743 transitions. [2022-12-14 11:55:18,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:55:18,641 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 130 [2022-12-14 11:55:18,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:55:18,701 INFO L225 Difference]: With dead ends: 24175 [2022-12-14 11:55:18,701 INFO L226 Difference]: Without dead ends: 12902 [2022-12-14 11:55:18,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:55:18,747 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 2 mSDsluCounter, 2989 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3594 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:55:18,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3594 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:55:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12902 states. [2022-12-14 11:55:19,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12902 to 12608. [2022-12-14 11:55:19,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12608 states, 9213 states have (on average 1.489308585694128) internal successors, (13721), 9630 states have internal predecessors, (13721), 2342 states have call successors, (2342), 684 states have call predecessors, (2342), 1052 states have return successors, (5135), 2453 states have call predecessors, (5135), 2325 states have call successors, (5135) [2022-12-14 11:55:19,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12608 states to 12608 states and 21198 transitions. [2022-12-14 11:55:19,371 INFO L78 Accepts]: Start accepts. Automaton has 12608 states and 21198 transitions. Word has length 130 [2022-12-14 11:55:19,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:55:19,371 INFO L495 AbstractCegarLoop]: Abstraction has 12608 states and 21198 transitions. [2022-12-14 11:55:19,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 11:55:19,371 INFO L276 IsEmpty]: Start isEmpty. Operand 12608 states and 21198 transitions. [2022-12-14 11:55:19,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 11:55:19,374 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:55:19,375 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:55:19,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 11:55:19,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:19,576 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:55:19,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:55:19,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1479307433, now seen corresponding path program 1 times [2022-12-14 11:55:19,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:55:19,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163061354] [2022-12-14 11:55:19,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:19,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:55:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:55:19,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:55:19,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163061354] [2022-12-14 11:55:19,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163061354] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:19,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921560904] [2022-12-14 11:55:19,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:19,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:19,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:55:19,911 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:55:19,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 11:55:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:20,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 1966 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:55:20,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 11:55:20,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:55:20,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921560904] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:55:20,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:55:20,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-12-14 11:55:20,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534276533] [2022-12-14 11:55:20,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:55:20,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:55:20,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:55:20,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:55:20,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:55:20,148 INFO L87 Difference]: Start difference. First operand 12608 states and 21198 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 11:55:20,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:55:20,915 INFO L93 Difference]: Finished difference Result 26245 states and 47262 transitions. [2022-12-14 11:55:20,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:55:20,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 144 [2022-12-14 11:55:20,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:55:20,977 INFO L225 Difference]: With dead ends: 26245 [2022-12-14 11:55:20,977 INFO L226 Difference]: Without dead ends: 14888 [2022-12-14 11:55:21,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:55:21,037 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 71 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:55:21,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 1242 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:55:21,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14888 states. [2022-12-14 11:55:21,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14888 to 14131. [2022-12-14 11:55:21,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14131 states, 10592 states have (on average 1.4937688821752266) internal successors, (15822), 11013 states have internal predecessors, (15822), 2482 states have call successors, (2482), 684 states have call predecessors, (2482), 1056 states have return successors, (5295), 2593 states have call predecessors, (5295), 2465 states have call successors, (5295) [2022-12-14 11:55:21,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14131 states to 14131 states and 23599 transitions. [2022-12-14 11:55:21,914 INFO L78 Accepts]: Start accepts. Automaton has 14131 states and 23599 transitions. Word has length 144 [2022-12-14 11:55:21,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:55:21,915 INFO L495 AbstractCegarLoop]: Abstraction has 14131 states and 23599 transitions. [2022-12-14 11:55:21,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 11:55:21,915 INFO L276 IsEmpty]: Start isEmpty. Operand 14131 states and 23599 transitions. [2022-12-14 11:55:21,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 11:55:21,918 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:55:21,918 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:55:21,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 11:55:22,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 11:55:22,120 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:55:22,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:55:22,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1329349389, now seen corresponding path program 1 times [2022-12-14 11:55:22,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:55:22,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213139472] [2022-12-14 11:55:22,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:22,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:55:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 11:55:22,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:55:22,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213139472] [2022-12-14 11:55:22,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213139472] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:22,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174758719] [2022-12-14 11:55:22,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:22,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:22,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:55:22,484 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:55:22,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 11:55:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:22,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1962 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:55:22,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:55:22,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:55:22,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174758719] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:55:22,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:55:22,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-12-14 11:55:22,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394364564] [2022-12-14 11:55:22,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:55:22,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:55:22,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:55:22,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:55:22,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:55:22,728 INFO L87 Difference]: Start difference. First operand 14131 states and 23599 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 11:55:23,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:55:23,566 INFO L93 Difference]: Finished difference Result 27329 states and 46653 transitions. [2022-12-14 11:55:23,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:55:23,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 131 [2022-12-14 11:55:23,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:55:23,618 INFO L225 Difference]: With dead ends: 27329 [2022-12-14 11:55:23,618 INFO L226 Difference]: Without dead ends: 14479 [2022-12-14 11:55:23,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:55:23,665 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 2 mSDsluCounter, 3005 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3614 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:55:23,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3614 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:55:23,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14479 states. [2022-12-14 11:55:24,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14479 to 14185. [2022-12-14 11:55:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14185 states, 10646 states have (on average 1.4912643246289685) internal successors, (15876), 11013 states have internal predecessors, (15876), 2482 states have call successors, (2482), 684 states have call predecessors, (2482), 1056 states have return successors, (5295), 2647 states have call predecessors, (5295), 2465 states have call successors, (5295) [2022-12-14 11:55:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14185 states to 14185 states and 23653 transitions. [2022-12-14 11:55:24,378 INFO L78 Accepts]: Start accepts. Automaton has 14185 states and 23653 transitions. Word has length 131 [2022-12-14 11:55:24,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:55:24,378 INFO L495 AbstractCegarLoop]: Abstraction has 14185 states and 23653 transitions. [2022-12-14 11:55:24,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 11:55:24,379 INFO L276 IsEmpty]: Start isEmpty. Operand 14185 states and 23653 transitions. [2022-12-14 11:55:24,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-12-14 11:55:24,382 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:55:24,382 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:55:24,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 11:55:24,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 11:55:24,584 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:55:24,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:55:24,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1066582274, now seen corresponding path program 1 times [2022-12-14 11:55:24,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:55:24,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544228033] [2022-12-14 11:55:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:24,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:55:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 11:55:24,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:55:24,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544228033] [2022-12-14 11:55:24,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544228033] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:24,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644083893] [2022-12-14 11:55:24,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:24,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:24,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:55:24,918 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:55:24,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 11:55:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:25,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 1971 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:55:25,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:55:25,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:55:25,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644083893] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:55:25,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:55:25,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-12-14 11:55:25,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673967565] [2022-12-14 11:55:25,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:55:25,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:55:25,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:55:25,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:55:25,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:55:25,179 INFO L87 Difference]: Start difference. First operand 14185 states and 23653 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-12-14 11:55:26,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:55:26,384 INFO L93 Difference]: Finished difference Result 28292 states and 48404 transitions. [2022-12-14 11:55:26,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:55:26,385 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 138 [2022-12-14 11:55:26,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:55:26,448 INFO L225 Difference]: With dead ends: 28292 [2022-12-14 11:55:26,448 INFO L226 Difference]: Without dead ends: 12287 [2022-12-14 11:55:26,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-12-14 11:55:26,508 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 220 mSDsluCounter, 2278 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 2915 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:55:26,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 2915 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:55:26,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12287 states. [2022-12-14 11:55:27,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12287 to 12267. [2022-12-14 11:55:27,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12267 states, 8942 states have (on average 1.443748602102438) internal successors, (12910), 9303 states have internal predecessors, (12910), 2298 states have call successors, (2298), 678 states have call predecessors, (2298), 1026 states have return successors, (4970), 2445 states have call predecessors, (4970), 2281 states have call successors, (4970) [2022-12-14 11:55:27,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12267 states to 12267 states and 20178 transitions. [2022-12-14 11:55:27,151 INFO L78 Accepts]: Start accepts. Automaton has 12267 states and 20178 transitions. Word has length 138 [2022-12-14 11:55:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:55:27,151 INFO L495 AbstractCegarLoop]: Abstraction has 12267 states and 20178 transitions. [2022-12-14 11:55:27,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-12-14 11:55:27,151 INFO L276 IsEmpty]: Start isEmpty. Operand 12267 states and 20178 transitions. [2022-12-14 11:55:27,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 11:55:27,155 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:55:27,155 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:55:27,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 11:55:27,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 11:55:27,357 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:55:27,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:55:27,358 INFO L85 PathProgramCache]: Analyzing trace with hash -72268646, now seen corresponding path program 1 times [2022-12-14 11:55:27,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:55:27,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950481932] [2022-12-14 11:55:27,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:27,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:55:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 11:55:27,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:55:27,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950481932] [2022-12-14 11:55:27,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950481932] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:27,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141302532] [2022-12-14 11:55:27,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:27,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:27,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:55:27,699 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:55:27,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 11:55:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:27,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 1974 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:55:27,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:55:28,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:55:28,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141302532] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:55:28,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:55:28,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-12-14 11:55:28,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078975972] [2022-12-14 11:55:28,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:55:28,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:55:28,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:55:28,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:55:28,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:55:28,010 INFO L87 Difference]: Start difference. First operand 12267 states and 20178 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-12-14 11:55:28,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:55:28,973 INFO L93 Difference]: Finished difference Result 26876 states and 45258 transitions. [2022-12-14 11:55:28,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:55:28,974 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 145 [2022-12-14 11:55:28,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:55:29,026 INFO L225 Difference]: With dead ends: 26876 [2022-12-14 11:55:29,026 INFO L226 Difference]: Without dead ends: 13571 [2022-12-14 11:55:29,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-12-14 11:55:29,081 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 261 mSDsluCounter, 2296 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 2944 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:55:29,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 2944 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:55:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13571 states. [2022-12-14 11:55:29,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13571 to 13457. [2022-12-14 11:55:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13457 states, 10051 states have (on average 1.439458760322356) internal successors, (14468), 10411 states have internal predecessors, (14468), 2338 states have call successors, (2338), 720 states have call predecessors, (2338), 1067 states have return successors, (4630), 2485 states have call predecessors, (4630), 2321 states have call successors, (4630) [2022-12-14 11:55:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13457 states to 13457 states and 21436 transitions. [2022-12-14 11:55:29,741 INFO L78 Accepts]: Start accepts. Automaton has 13457 states and 21436 transitions. Word has length 145 [2022-12-14 11:55:29,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:55:29,741 INFO L495 AbstractCegarLoop]: Abstraction has 13457 states and 21436 transitions. [2022-12-14 11:55:29,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-12-14 11:55:29,741 INFO L276 IsEmpty]: Start isEmpty. Operand 13457 states and 21436 transitions. [2022-12-14 11:55:29,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 11:55:29,746 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:55:29,746 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:55:29,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 11:55:29,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:29,948 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:55:29,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:55:29,949 INFO L85 PathProgramCache]: Analyzing trace with hash -416394470, now seen corresponding path program 1 times [2022-12-14 11:55:29,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:55:29,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827287473] [2022-12-14 11:55:29,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:29,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:55:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 11:55:30,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:55:30,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827287473] [2022-12-14 11:55:30,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827287473] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:30,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143683349] [2022-12-14 11:55:30,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:30,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:30,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:55:30,287 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:55:30,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 11:55:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:30,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 1975 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 11:55:30,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 11:55:30,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:55:30,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143683349] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:55:30,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:55:30,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2022-12-14 11:55:30,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879535675] [2022-12-14 11:55:30,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:55:30,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:55:30,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:55:30,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:55:30,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:55:30,662 INFO L87 Difference]: Start difference. First operand 13457 states and 21436 transitions. Second operand has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-12-14 11:55:32,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:55:32,689 INFO L93 Difference]: Finished difference Result 35635 states and 60590 transitions. [2022-12-14 11:55:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:55:32,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 143 [2022-12-14 11:55:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:55:32,796 INFO L225 Difference]: With dead ends: 35635 [2022-12-14 11:55:32,796 INFO L226 Difference]: Without dead ends: 22110 [2022-12-14 11:55:32,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:55:32,864 INFO L413 NwaCegarLoop]: 779 mSDtfsCounter, 624 mSDsluCounter, 2507 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 3286 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:55:32,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 3286 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:55:32,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22110 states. [2022-12-14 11:55:33,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22110 to 20793. [2022-12-14 11:55:33,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20793 states, 15533 states have (on average 1.4355887465396253) internal successors, (22299), 16134 states have internal predecessors, (22299), 3580 states have call successors, (3580), 1133 states have call predecessors, (3580), 1679 states have return successors, (8294), 3784 states have call predecessors, (8294), 3558 states have call successors, (8294) [2022-12-14 11:55:34,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20793 states to 20793 states and 34173 transitions. [2022-12-14 11:55:34,018 INFO L78 Accepts]: Start accepts. Automaton has 20793 states and 34173 transitions. Word has length 143 [2022-12-14 11:55:34,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:55:34,018 INFO L495 AbstractCegarLoop]: Abstraction has 20793 states and 34173 transitions. [2022-12-14 11:55:34,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-12-14 11:55:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand 20793 states and 34173 transitions. [2022-12-14 11:55:34,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-14 11:55:34,024 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:55:34,024 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:55:34,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 11:55:34,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 11:55:34,225 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:55:34,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:55:34,226 INFO L85 PathProgramCache]: Analyzing trace with hash -2101346596, now seen corresponding path program 1 times [2022-12-14 11:55:34,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:55:34,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712784341] [2022-12-14 11:55:34,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:34,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:55:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 11:55:34,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:55:34,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712784341] [2022-12-14 11:55:34,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712784341] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:34,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024378610] [2022-12-14 11:55:34,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:34,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:34,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:55:34,849 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:55:34,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 11:55:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:35,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 1991 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 11:55:35,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:55:35,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:55:35,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024378610] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:55:35,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:55:35,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-12-14 11:55:35,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138578347] [2022-12-14 11:55:35,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:55:35,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:55:35,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:55:35,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:55:35,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:55:35,251 INFO L87 Difference]: Start difference. First operand 20793 states and 34173 transitions. Second operand has 6 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-12-14 11:55:37,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:55:37,277 INFO L93 Difference]: Finished difference Result 47648 states and 79532 transitions. [2022-12-14 11:55:37,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:55:37,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 149 [2022-12-14 11:55:37,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:55:37,383 INFO L225 Difference]: With dead ends: 47648 [2022-12-14 11:55:37,383 INFO L226 Difference]: Without dead ends: 26867 [2022-12-14 11:55:37,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:55:37,456 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 582 mSDsluCounter, 2499 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 3272 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:55:37,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 3272 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:55:37,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26867 states. [2022-12-14 11:55:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26867 to 25440. [2022-12-14 11:55:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25440 states, 19033 states have (on average 1.4263647349340618) internal successors, (27148), 19781 states have internal predecessors, (27148), 4370 states have call successors, (4370), 1369 states have call predecessors, (4370), 2036 states have return successors, (9678), 4605 states have call predecessors, (9678), 4344 states have call successors, (9678) [2022-12-14 11:55:39,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25440 states to 25440 states and 41196 transitions. [2022-12-14 11:55:39,147 INFO L78 Accepts]: Start accepts. Automaton has 25440 states and 41196 transitions. Word has length 149 [2022-12-14 11:55:39,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:55:39,147 INFO L495 AbstractCegarLoop]: Abstraction has 25440 states and 41196 transitions. [2022-12-14 11:55:39,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-12-14 11:55:39,147 INFO L276 IsEmpty]: Start isEmpty. Operand 25440 states and 41196 transitions. [2022-12-14 11:55:39,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 11:55:39,154 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:55:39,154 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:55:39,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 11:55:39,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:39,355 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:55:39,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:55:39,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1236101436, now seen corresponding path program 1 times [2022-12-14 11:55:39,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:55:39,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564273190] [2022-12-14 11:55:39,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:39,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:55:39,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 11:55:39,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:55:39,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564273190] [2022-12-14 11:55:39,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564273190] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:39,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576871234] [2022-12-14 11:55:39,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:39,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:39,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:55:39,975 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:55:39,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 11:55:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:40,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 2006 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 11:55:40,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 11:55:40,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:55:40,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576871234] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:55:40,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:55:40,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-12-14 11:55:40,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592871305] [2022-12-14 11:55:40,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:55:40,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:55:40,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:55:40,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:55:40,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:55:40,440 INFO L87 Difference]: Start difference. First operand 25440 states and 41196 transitions. Second operand has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-12-14 11:55:42,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:55:42,465 INFO L93 Difference]: Finished difference Result 51294 states and 84918 transitions. [2022-12-14 11:55:42,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:55:42,466 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 158 [2022-12-14 11:55:42,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:55:42,601 INFO L225 Difference]: With dead ends: 51294 [2022-12-14 11:55:42,601 INFO L226 Difference]: Without dead ends: 25866 [2022-12-14 11:55:42,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:55:42,715 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 564 mSDsluCounter, 2464 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 3226 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:55:42,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 3226 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:55:42,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25866 states. [2022-12-14 11:55:44,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25866 to 24438. [2022-12-14 11:55:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24438 states, 18323 states have (on average 1.4258036347759646) internal successors, (26125), 19038 states have internal predecessors, (26125), 4210 states have call successors, (4210), 1328 states have call predecessors, (4210), 1904 states have return successors, (9175), 4379 states have call predecessors, (9175), 4184 states have call successors, (9175) [2022-12-14 11:55:44,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24438 states to 24438 states and 39510 transitions. [2022-12-14 11:55:44,155 INFO L78 Accepts]: Start accepts. Automaton has 24438 states and 39510 transitions. Word has length 158 [2022-12-14 11:55:44,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:55:44,155 INFO L495 AbstractCegarLoop]: Abstraction has 24438 states and 39510 transitions. [2022-12-14 11:55:44,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-12-14 11:55:44,155 INFO L276 IsEmpty]: Start isEmpty. Operand 24438 states and 39510 transitions. [2022-12-14 11:55:44,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 11:55:44,161 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:55:44,161 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:55:44,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 11:55:44,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:44,362 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:55:44,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:55:44,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1870552507, now seen corresponding path program 1 times [2022-12-14 11:55:44,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:55:44,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644175421] [2022-12-14 11:55:44,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:44,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:55:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 11:55:44,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:55:44,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644175421] [2022-12-14 11:55:44,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644175421] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:44,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199571578] [2022-12-14 11:55:44,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:44,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:44,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:55:44,565 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:55:44,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 11:55:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:44,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 2418 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:55:44,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 11:55:44,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:55:44,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199571578] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:55:44,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:55:44,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-12-14 11:55:44,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465470027] [2022-12-14 11:55:44,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:55:44,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:55:44,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:55:44,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:55:44,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:55:44,905 INFO L87 Difference]: Start difference. First operand 24438 states and 39510 transitions. Second operand has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 5 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2022-12-14 11:55:48,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:55:48,466 INFO L93 Difference]: Finished difference Result 52715 states and 86616 transitions. [2022-12-14 11:55:48,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 11:55:48,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 5 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) Word has length 150 [2022-12-14 11:55:48,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:55:48,592 INFO L225 Difference]: With dead ends: 52715 [2022-12-14 11:55:48,592 INFO L226 Difference]: Without dead ends: 28179 [2022-12-14 11:55:48,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-12-14 11:55:48,678 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 1197 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 3402 mSolverCounterSat, 500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1285 SdHoareTripleChecker+Valid, 1499 SdHoareTripleChecker+Invalid, 3902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 500 IncrementalHoareTripleChecker+Valid, 3402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:55:48,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1285 Valid, 1499 Invalid, 3902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [500 Valid, 3402 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 11:55:48,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28179 states. [2022-12-14 11:55:50,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28179 to 24413. [2022-12-14 11:55:50,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24413 states, 18298 states have (on average 1.4261121434036508) internal successors, (26095), 19013 states have internal predecessors, (26095), 4210 states have call successors, (4210), 1328 states have call predecessors, (4210), 1904 states have return successors, (9175), 4379 states have call predecessors, (9175), 4184 states have call successors, (9175) [2022-12-14 11:55:50,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24413 states to 24413 states and 39480 transitions. [2022-12-14 11:55:50,523 INFO L78 Accepts]: Start accepts. Automaton has 24413 states and 39480 transitions. Word has length 150 [2022-12-14 11:55:50,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:55:50,524 INFO L495 AbstractCegarLoop]: Abstraction has 24413 states and 39480 transitions. [2022-12-14 11:55:50,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 5 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2022-12-14 11:55:50,524 INFO L276 IsEmpty]: Start isEmpty. Operand 24413 states and 39480 transitions. [2022-12-14 11:55:50,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-12-14 11:55:50,529 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:55:50,529 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:55:50,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 11:55:50,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 11:55:50,730 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:55:50,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:55:50,731 INFO L85 PathProgramCache]: Analyzing trace with hash -209325579, now seen corresponding path program 1 times [2022-12-14 11:55:50,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:55:50,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946811485] [2022-12-14 11:55:50,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:50,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:55:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 11:55:51,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:55:51,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946811485] [2022-12-14 11:55:51,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946811485] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:51,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640014237] [2022-12-14 11:55:51,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:51,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:51,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:55:51,504 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:55:51,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 11:55:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:51,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 2477 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:55:51,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 43 proven. 3 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 11:55:51,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:55:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 11:55:52,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640014237] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:55:52,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1141279085] [2022-12-14 11:55:52,096 INFO L159 IcfgInterpreter]: Started Sifa with 111 locations of interest [2022-12-14 11:55:52,096 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:55:52,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:55:52,102 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:55:52,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:55:59,128 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 679 for LOIs [2022-12-14 11:56:05,863 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 25 for LOIs [2022-12-14 11:56:05,865 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__twothirdsfull with input of size 50 for LOIs [2022-12-14 11:56:06,417 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 53 for LOIs [2022-12-14 11:56:07,011 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 87 for LOIs [2022-12-14 11:56:07,029 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 605 for LOIs [2022-12-14 11:56:09,209 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 579 for LOIs [2022-12-14 11:56:09,415 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 80 for LOIs [2022-12-14 11:56:09,649 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 69 for LOIs [2022-12-14 11:56:09,662 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 42 for LOIs [2022-12-14 11:56:09,666 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 65 for LOIs [2022-12-14 11:56:09,688 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 48 for LOIs [2022-12-14 11:56:09,695 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 579 for LOIs [2022-12-14 11:56:13,268 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-12-14 11:56:13,842 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-12-14 11:56:13,991 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:57:17,329 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '954511#(and (= ~currentHeading~0 0) (= ~head~0.offset 0) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 11:57:17,330 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:57:17,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:57:17,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 9] total 29 [2022-12-14 11:57:17,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247305668] [2022-12-14 11:57:17,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:57:17,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 11:57:17,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:57:17,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 11:57:17,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=779, Invalid=13741, Unknown=0, NotChecked=0, Total=14520 [2022-12-14 11:57:17,339 INFO L87 Difference]: Start difference. First operand 24413 states and 39480 transitions. Second operand has 29 states, 21 states have (on average 8.0) internal successors, (168), 25 states have internal predecessors, (168), 16 states have call successors, (59), 7 states have call predecessors, (59), 15 states have return successors, (60), 19 states have call predecessors, (60), 16 states have call successors, (60) [2022-12-14 11:57:32,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:57:32,233 INFO L93 Difference]: Finished difference Result 72092 states and 129081 transitions. [2022-12-14 11:57:32,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-14 11:57:32,234 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 8.0) internal successors, (168), 25 states have internal predecessors, (168), 16 states have call successors, (59), 7 states have call predecessors, (59), 15 states have return successors, (60), 19 states have call predecessors, (60), 16 states have call successors, (60) Word has length 170 [2022-12-14 11:57:32,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:57:32,459 INFO L225 Difference]: With dead ends: 72092 [2022-12-14 11:57:32,459 INFO L226 Difference]: Without dead ends: 49957 [2022-12-14 11:57:32,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 425 SyntacticMatches, 12 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13013 ImplicationChecksByTransitivity, 65.5s TimeCoverageRelationStatistics Valid=2063, Invalid=30157, Unknown=0, NotChecked=0, Total=32220 [2022-12-14 11:57:32,642 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 8841 mSDsluCounter, 6767 mSDsCounter, 0 mSdLazyCounter, 20955 mSolverCounterSat, 5731 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8841 SdHoareTripleChecker+Valid, 7410 SdHoareTripleChecker+Invalid, 26686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5731 IncrementalHoareTripleChecker+Valid, 20955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:57:32,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8841 Valid, 7410 Invalid, 26686 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5731 Valid, 20955 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2022-12-14 11:57:32,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49957 states. [2022-12-14 11:57:35,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49957 to 43499. [2022-12-14 11:57:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43499 states, 30938 states have (on average 1.3995733402288448) internal successors, (43300), 32674 states have internal predecessors, (43300), 8915 states have call successors, (8915), 2876 states have call predecessors, (8915), 3645 states have return successors, (16772), 8706 states have call predecessors, (16772), 8876 states have call successors, (16772) [2022-12-14 11:57:35,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43499 states to 43499 states and 68987 transitions. [2022-12-14 11:57:35,984 INFO L78 Accepts]: Start accepts. Automaton has 43499 states and 68987 transitions. Word has length 170 [2022-12-14 11:57:35,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:57:35,985 INFO L495 AbstractCegarLoop]: Abstraction has 43499 states and 68987 transitions. [2022-12-14 11:57:35,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 8.0) internal successors, (168), 25 states have internal predecessors, (168), 16 states have call successors, (59), 7 states have call predecessors, (59), 15 states have return successors, (60), 19 states have call predecessors, (60), 16 states have call successors, (60) [2022-12-14 11:57:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 43499 states and 68987 transitions. [2022-12-14 11:57:35,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-12-14 11:57:35,990 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:57:35,990 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:57:35,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 11:57:36,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 11:57:36,192 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:57:36,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:57:36,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1875583370, now seen corresponding path program 1 times [2022-12-14 11:57:36,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:57:36,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321706644] [2022-12-14 11:57:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:57:36,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:57:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:57:36,408 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-12-14 11:57:36,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:57:36,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321706644] [2022-12-14 11:57:36,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321706644] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:57:36,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:57:36,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 11:57:36,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799165509] [2022-12-14 11:57:36,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:57:36,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:57:36,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:57:36,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:57:36,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:57:36,410 INFO L87 Difference]: Start difference. First operand 43499 states and 68987 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 11:57:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:57:39,661 INFO L93 Difference]: Finished difference Result 76708 states and 122935 transitions. [2022-12-14 11:57:39,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:57:39,663 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) Word has length 187 [2022-12-14 11:57:39,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:57:39,949 INFO L225 Difference]: With dead ends: 76708 [2022-12-14 11:57:39,949 INFO L226 Difference]: Without dead ends: 44512 [2022-12-14 11:57:40,080 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 [2022-12-14 11:57:40,081 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 6 mSDsluCounter, 2916 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3508 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:57:40,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3508 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:57:40,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44512 states. [2022-12-14 11:57:43,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44512 to 44296. [2022-12-14 11:57:43,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44296 states, 31470 states have (on average 1.3928185573562122) internal successors, (43832), 33306 states have internal predecessors, (43832), 8915 states have call successors, (8915), 2876 states have call predecessors, (8915), 3910 states have return successors, (17263), 8871 states have call predecessors, (17263), 8876 states have call successors, (17263) [2022-12-14 11:57:43,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44296 states to 44296 states and 70010 transitions. [2022-12-14 11:57:43,311 INFO L78 Accepts]: Start accepts. Automaton has 44296 states and 70010 transitions. Word has length 187 [2022-12-14 11:57:43,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:57:43,311 INFO L495 AbstractCegarLoop]: Abstraction has 44296 states and 70010 transitions. [2022-12-14 11:57:43,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 11:57:43,311 INFO L276 IsEmpty]: Start isEmpty. Operand 44296 states and 70010 transitions. [2022-12-14 11:57:43,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-12-14 11:57:43,316 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:57:43,316 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:57:43,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 11:57:43,317 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:57:43,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:57:43,317 INFO L85 PathProgramCache]: Analyzing trace with hash 905239699, now seen corresponding path program 1 times [2022-12-14 11:57:43,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:57:43,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707118159] [2022-12-14 11:57:43,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:57:43,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:57:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:57:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-12-14 11:57:43,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:57:43,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707118159] [2022-12-14 11:57:43,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707118159] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:57:43,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:57:43,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 11:57:43,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754847506] [2022-12-14 11:57:43,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:57:43,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:57:43,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:57:43,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:57:43,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:57:43,496 INFO L87 Difference]: Start difference. First operand 44296 states and 70010 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 11:57:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:57:46,783 INFO L93 Difference]: Finished difference Result 77946 states and 124516 transitions. [2022-12-14 11:57:46,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:57:46,784 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) Word has length 185 [2022-12-14 11:57:46,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:57:46,993 INFO L225 Difference]: With dead ends: 77946 [2022-12-14 11:57:46,993 INFO L226 Difference]: Without dead ends: 45073 [2022-12-14 11:57:47,150 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 [2022-12-14 11:57:47,151 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 6 mSDsluCounter, 2920 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3513 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:57:47,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3513 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:57:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45073 states. [2022-12-14 11:57:50,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45073 to 44351. [2022-12-14 11:57:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44351 states, 31529 states have (on average 1.3920834787021472) internal successors, (43891), 33298 states have internal predecessors, (43891), 8915 states have call successors, (8915), 2876 states have call predecessors, (8915), 3906 states have return successors, (17255), 8934 states have call predecessors, (17255), 8876 states have call successors, (17255) [2022-12-14 11:57:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44351 states to 44351 states and 70061 transitions. [2022-12-14 11:57:50,851 INFO L78 Accepts]: Start accepts. Automaton has 44351 states and 70061 transitions. Word has length 185 [2022-12-14 11:57:50,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:57:50,851 INFO L495 AbstractCegarLoop]: Abstraction has 44351 states and 70061 transitions. [2022-12-14 11:57:50,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 11:57:50,852 INFO L276 IsEmpty]: Start isEmpty. Operand 44351 states and 70061 transitions. [2022-12-14 11:57:50,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-12-14 11:57:50,857 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:57:50,857 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:57:50,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 11:57:50,857 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:57:50,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:57:50,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1269494806, now seen corresponding path program 1 times [2022-12-14 11:57:50,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:57:50,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415201869] [2022-12-14 11:57:50,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:57:50,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:57:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:57:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 11:57:51,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:57:51,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415201869] [2022-12-14 11:57:51,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415201869] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:57:51,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:57:51,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 11:57:51,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138837023] [2022-12-14 11:57:51,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:57:51,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:57:51,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:57:51,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:57:51,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:57:51,081 INFO L87 Difference]: Start difference. First operand 44351 states and 70061 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 11:57:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:57:54,495 INFO L93 Difference]: Finished difference Result 77735 states and 124085 transitions. [2022-12-14 11:57:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:57:54,496 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) Word has length 188 [2022-12-14 11:57:54,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:57:54,705 INFO L225 Difference]: With dead ends: 77735 [2022-12-14 11:57:54,705 INFO L226 Difference]: Without dead ends: 44807 [2022-12-14 11:57:54,856 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 [2022-12-14 11:57:54,857 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 6 mSDsluCounter, 2916 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3508 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:57:54,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3508 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:57:54,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44807 states. [2022-12-14 11:57:57,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44807 to 44109. [2022-12-14 11:57:57,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44109 states, 31396 states have (on average 1.3918333545674608) internal successors, (43698), 33053 states have internal predecessors, (43698), 8882 states have call successors, (8882), 2876 states have call predecessors, (8882), 3830 states have return successors, (17033), 8937 states have call predecessors, (17033), 8843 states have call successors, (17033) [2022-12-14 11:57:58,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44109 states to 44109 states and 69613 transitions. [2022-12-14 11:57:58,174 INFO L78 Accepts]: Start accepts. Automaton has 44109 states and 69613 transitions. Word has length 188 [2022-12-14 11:57:58,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:57:58,174 INFO L495 AbstractCegarLoop]: Abstraction has 44109 states and 69613 transitions. [2022-12-14 11:57:58,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 11:57:58,174 INFO L276 IsEmpty]: Start isEmpty. Operand 44109 states and 69613 transitions. [2022-12-14 11:57:58,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-12-14 11:57:58,184 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:57:58,184 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:57:58,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 11:57:58,184 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:57:58,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:57:58,184 INFO L85 PathProgramCache]: Analyzing trace with hash -753878435, now seen corresponding path program 1 times [2022-12-14 11:57:58,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:57:58,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184126292] [2022-12-14 11:57:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:57:58,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:57:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:57:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-14 11:57:58,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:57:58,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184126292] [2022-12-14 11:57:58,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184126292] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:57:58,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765421330] [2022-12-14 11:57:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:57:58,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:57:58,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:57:58,547 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:57:58,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 11:57:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:57:58,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 2522 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:57:58,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:57:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 44 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 11:57:58,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:57:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-12-14 11:57:59,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765421330] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:57:59,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [634613890] [2022-12-14 11:57:59,147 INFO L159 IcfgInterpreter]: Started Sifa with 133 locations of interest [2022-12-14 11:57:59,147 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:57:59,148 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:57:59,148 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:57:59,148 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:58:05,596 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 679 for LOIs [2022-12-14 11:58:12,457 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 25 for LOIs [2022-12-14 11:58:12,459 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__twothirdsfull with input of size 50 for LOIs [2022-12-14 11:58:12,991 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 53 for LOIs [2022-12-14 11:58:13,325 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 87 for LOIs [2022-12-14 11:58:13,343 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 605 for LOIs [2022-12-14 11:58:15,680 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 579 for LOIs [2022-12-14 11:58:15,887 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 68 for LOIs [2022-12-14 11:58:16,632 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 62 for LOIs [2022-12-14 11:58:16,635 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 62 for LOIs [2022-12-14 11:58:16,649 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 42 for LOIs [2022-12-14 11:58:16,652 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 67 for LOIs [2022-12-14 11:58:16,674 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 48 for LOIs [2022-12-14 11:58:16,680 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 579 for LOIs [2022-12-14 11:58:20,203 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-12-14 11:58:20,783 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-12-14 11:58:20,931 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:59:32,374 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1619014#(and (= ~currentHeading~0 0) (= ~head~0.offset 0) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 11:59:32,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:59:32,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:59:32,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-12-14 11:59:32,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920399114] [2022-12-14 11:59:32,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:59:32,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 11:59:32,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:59:32,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 11:59:32,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=15646, Unknown=0, NotChecked=0, Total=16512 [2022-12-14 11:59:32,377 INFO L87 Difference]: Start difference. First operand 44109 states and 69613 transitions. Second operand has 22 states, 19 states have (on average 8.210526315789474) internal successors, (156), 19 states have internal predecessors, (156), 11 states have call successors, (44), 6 states have call predecessors, (44), 10 states have return successors, (46), 16 states have call predecessors, (46), 11 states have call successors, (46) [2022-12-14 12:00:07,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:00:07,342 INFO L93 Difference]: Finished difference Result 209468 states and 420902 transitions. [2022-12-14 12:00:07,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-12-14 12:00:07,343 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 8.210526315789474) internal successors, (156), 19 states have internal predecessors, (156), 11 states have call successors, (44), 6 states have call predecessors, (44), 10 states have return successors, (46), 16 states have call predecessors, (46), 11 states have call successors, (46) Word has length 195 [2022-12-14 12:00:07,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:00:08,628 INFO L225 Difference]: With dead ends: 209468 [2022-12-14 12:00:08,628 INFO L226 Difference]: Without dead ends: 168280 [2022-12-14 12:00:09,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 490 SyntacticMatches, 14 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33148 ImplicationChecksByTransitivity, 75.0s TimeCoverageRelationStatistics Valid=3559, Invalid=75683, Unknown=0, NotChecked=0, Total=79242 [2022-12-14 12:00:09,230 INFO L413 NwaCegarLoop]: 1490 mSDtfsCounter, 10008 mSDsluCounter, 12612 mSDsCounter, 0 mSdLazyCounter, 33216 mSolverCounterSat, 7500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10052 SdHoareTripleChecker+Valid, 14102 SdHoareTripleChecker+Invalid, 40716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7500 IncrementalHoareTripleChecker+Valid, 33216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:00:09,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10052 Valid, 14102 Invalid, 40716 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7500 Valid, 33216 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time] [2022-12-14 12:00:09,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168280 states. [2022-12-14 12:00:21,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168280 to 130445. [2022-12-14 12:00:21,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130445 states, 91735 states have (on average 1.3603858941516325) internal successors, (124795), 96205 states have internal predecessors, (124795), 26826 states have call successors, (26826), 10115 states have call predecessors, (26826), 11883 states have return successors, (68087), 26369 states have call predecessors, (68087), 26671 states have call successors, (68087) [2022-12-14 12:00:23,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130445 states to 130445 states and 219708 transitions. [2022-12-14 12:00:23,238 INFO L78 Accepts]: Start accepts. Automaton has 130445 states and 219708 transitions. Word has length 195 [2022-12-14 12:00:23,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:00:23,238 INFO L495 AbstractCegarLoop]: Abstraction has 130445 states and 219708 transitions. [2022-12-14 12:00:23,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 8.210526315789474) internal successors, (156), 19 states have internal predecessors, (156), 11 states have call successors, (44), 6 states have call predecessors, (44), 10 states have return successors, (46), 16 states have call predecessors, (46), 11 states have call successors, (46) [2022-12-14 12:00:23,239 INFO L276 IsEmpty]: Start isEmpty. Operand 130445 states and 219708 transitions. [2022-12-14 12:00:23,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-12-14 12:00:23,259 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:00:23,259 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:00:23,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 12:00:23,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 12:00:23,460 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:00:23,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:00:23,460 INFO L85 PathProgramCache]: Analyzing trace with hash -853749015, now seen corresponding path program 1 times [2022-12-14 12:00:23,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:00:23,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236232640] [2022-12-14 12:00:23,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:00:23,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:00:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:00:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-12-14 12:00:23,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:00:23,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236232640] [2022-12-14 12:00:23,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236232640] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:00:23,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856305346] [2022-12-14 12:00:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:00:23,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:00:23,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:00:23,934 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:00:23,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 12:00:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:00:24,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 2651 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:00:24,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:00:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-14 12:00:24,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:00:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-12-14 12:00:24,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856305346] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:00:24,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1428623387] [2022-12-14 12:00:24,625 INFO L159 IcfgInterpreter]: Started Sifa with 143 locations of interest [2022-12-14 12:00:24,625 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:00:24,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:00:24,625 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:00:24,626 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:00:31,945 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 675 for LOIs [2022-12-14 12:00:38,246 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 25 for LOIs [2022-12-14 12:00:38,247 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__twothirdsfull with input of size 42 for LOIs [2022-12-14 12:00:39,356 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 46 for LOIs [2022-12-14 12:00:39,649 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 84 for LOIs [2022-12-14 12:00:39,685 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 605 for LOIs [2022-12-14 12:00:42,423 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 579 for LOIs [2022-12-14 12:00:42,630 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 61 for LOIs [2022-12-14 12:00:43,195 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 41 for LOIs [2022-12-14 12:00:43,203 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 42 for LOIs [2022-12-14 12:00:43,207 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 50 for LOIs [2022-12-14 12:00:43,280 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 81 for LOIs [2022-12-14 12:00:43,292 INFO L197 IcfgInterpreter]: Interpreting procedure getReverseHeading with input of size 60 for LOIs [2022-12-14 12:00:43,298 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 48 for LOIs [2022-12-14 12:00:43,305 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 579 for LOIs [2022-12-14 12:00:48,848 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-12-14 12:00:49,429 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-12-14 12:00:49,578 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:02:05,041 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2091211#(and (= ~currentHeading~0 0) (= ~head~0.offset 0) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 12:02:05,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:02:05,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:02:05,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 26 [2022-12-14 12:02:05,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135219761] [2022-12-14 12:02:05,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:02:05,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 12:02:05,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:05,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 12:02:05,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1052, Invalid=19540, Unknown=0, NotChecked=0, Total=20592 [2022-12-14 12:02:05,046 INFO L87 Difference]: Start difference. First operand 130445 states and 219708 transitions. Second operand has 26 states, 23 states have (on average 9.26086956521739) internal successors, (213), 21 states have internal predecessors, (213), 14 states have call successors, (65), 9 states have call predecessors, (65), 12 states have return successors, (68), 18 states have call predecessors, (68), 14 states have call successors, (68) [2022-12-14 12:02:56,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:56,837 INFO L93 Difference]: Finished difference Result 358500 states and 729180 transitions. [2022-12-14 12:02:56,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-12-14 12:02:56,838 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 9.26086956521739) internal successors, (213), 21 states have internal predecessors, (213), 14 states have call successors, (65), 9 states have call predecessors, (65), 12 states have return successors, (68), 18 states have call predecessors, (68), 14 states have call successors, (68) Word has length 223 [2022-12-14 12:02:56,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:59,200 INFO L225 Difference]: With dead ends: 358500 [2022-12-14 12:02:59,200 INFO L226 Difference]: Without dead ends: 248381 [2022-12-14 12:03:01,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 578 SyntacticMatches, 11 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35852 ImplicationChecksByTransitivity, 78.8s TimeCoverageRelationStatistics Valid=4082, Invalid=79728, Unknown=0, NotChecked=0, Total=83810 [2022-12-14 12:03:01,614 INFO L413 NwaCegarLoop]: 1016 mSDtfsCounter, 11963 mSDsluCounter, 10187 mSDsCounter, 0 mSdLazyCounter, 34251 mSolverCounterSat, 9017 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12007 SdHoareTripleChecker+Valid, 11203 SdHoareTripleChecker+Invalid, 43268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9017 IncrementalHoareTripleChecker+Valid, 34251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2022-12-14 12:03:01,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12007 Valid, 11203 Invalid, 43268 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9017 Valid, 34251 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time] [2022-12-14 12:03:01,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248381 states. [2022-12-14 12:03:22,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248381 to 207396. [2022-12-14 12:03:23,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207396 states, 142733 states have (on average 1.3514183825744572) internal successors, (192892), 150206 states have internal predecessors, (192892), 44165 states have call successors, (44165), 17759 states have call predecessors, (44165), 20497 states have return successors, (110251), 43207 states have call predecessors, (110251), 43926 states have call successors, (110251) [2022-12-14 12:03:26,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207396 states to 207396 states and 347308 transitions. [2022-12-14 12:03:26,874 INFO L78 Accepts]: Start accepts. Automaton has 207396 states and 347308 transitions. Word has length 223 [2022-12-14 12:03:26,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:03:26,874 INFO L495 AbstractCegarLoop]: Abstraction has 207396 states and 347308 transitions. [2022-12-14 12:03:26,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 9.26086956521739) internal successors, (213), 21 states have internal predecessors, (213), 14 states have call successors, (65), 9 states have call predecessors, (65), 12 states have return successors, (68), 18 states have call predecessors, (68), 14 states have call successors, (68) [2022-12-14 12:03:26,875 INFO L276 IsEmpty]: Start isEmpty. Operand 207396 states and 347308 transitions. [2022-12-14 12:03:26,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-12-14 12:03:26,890 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:03:26,890 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:03:26,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 12:03:27,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 12:03:27,092 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:03:27,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:03:27,093 INFO L85 PathProgramCache]: Analyzing trace with hash -772464397, now seen corresponding path program 1 times [2022-12-14 12:03:27,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:03:27,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492487438] [2022-12-14 12:03:27,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:03:27,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:03:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:03:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-12-14 12:03:27,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:03:27,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492487438] [2022-12-14 12:03:27,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492487438] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:03:27,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:03:27,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:03:27,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143953075] [2022-12-14 12:03:27,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:03:27,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:03:27,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:03:27,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:03:27,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:03:27,226 INFO L87 Difference]: Start difference. First operand 207396 states and 347308 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 12:03:54,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:03:54,425 INFO L93 Difference]: Finished difference Result 382434 states and 643353 transitions. [2022-12-14 12:03:54,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:03:54,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 212 [2022-12-14 12:03:54,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:03:55,924 INFO L225 Difference]: With dead ends: 382434 [2022-12-14 12:03:55,924 INFO L226 Difference]: Without dead ends: 211832 [2022-12-14 12:03:59,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:03:59,062 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 30 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:03:59,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1162 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:03:59,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211832 states. [2022-12-14 12:04:18,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211832 to 211731. [2022-12-14 12:04:19,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211731 states, 146250 states have (on average 1.3450324786324785) internal successors, (196711), 154223 states have internal predecessors, (196711), 44553 states have call successors, (44553), 17593 states have call predecessors, (44553), 20927 states have return successors, (105846), 43775 states have call predecessors, (105846), 44341 states have call successors, (105846) [2022-12-14 12:04:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211731 states to 211731 states and 347110 transitions. [2022-12-14 12:04:22,627 INFO L78 Accepts]: Start accepts. Automaton has 211731 states and 347110 transitions. Word has length 212 [2022-12-14 12:04:22,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:04:22,628 INFO L495 AbstractCegarLoop]: Abstraction has 211731 states and 347110 transitions. [2022-12-14 12:04:22,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 12:04:22,628 INFO L276 IsEmpty]: Start isEmpty. Operand 211731 states and 347110 transitions. [2022-12-14 12:04:22,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-12-14 12:04:22,643 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:04:22,643 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:04:22,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 12:04:22,643 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:04:22,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:04:22,643 INFO L85 PathProgramCache]: Analyzing trace with hash 747857004, now seen corresponding path program 1 times [2022-12-14 12:04:22,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:04:22,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552607635] [2022-12-14 12:04:22,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:04:22,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:04:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:04:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-12-14 12:04:22,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:04:22,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552607635] [2022-12-14 12:04:22,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552607635] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:04:22,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:04:22,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:04:22,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797742626] [2022-12-14 12:04:22,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:04:22,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:04:22,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:04:22,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:04:22,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:04:22,748 INFO L87 Difference]: Start difference. First operand 211731 states and 347110 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-12-14 12:04:50,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:04:50,565 INFO L93 Difference]: Finished difference Result 401112 states and 669651 transitions. [2022-12-14 12:04:50,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:04:50,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 218 [2022-12-14 12:04:50,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:04:52,498 INFO L225 Difference]: With dead ends: 401112 [2022-12-14 12:04:52,498 INFO L226 Difference]: Without dead ends: 216609 [2022-12-14 12:04:55,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:04:55,904 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 29 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:04:55,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1150 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:04:56,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216609 states. [2022-12-14 12:05:16,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216609 to 216019. [2022-12-14 12:05:16,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216019 states, 149503 states have (on average 1.3400132438813936) internal successors, (200336), 157906 states have internal predecessors, (200336), 45067 states have call successors, (45067), 17590 states have call predecessors, (45067), 21448 states have return successors, (109518), 44462 states have call predecessors, (109518), 44855 states have call successors, (109518) [2022-12-14 12:05:20,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216019 states to 216019 states and 354921 transitions. [2022-12-14 12:05:20,469 INFO L78 Accepts]: Start accepts. Automaton has 216019 states and 354921 transitions. Word has length 218 [2022-12-14 12:05:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:05:20,469 INFO L495 AbstractCegarLoop]: Abstraction has 216019 states and 354921 transitions. [2022-12-14 12:05:20,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-12-14 12:05:20,469 INFO L276 IsEmpty]: Start isEmpty. Operand 216019 states and 354921 transitions. [2022-12-14 12:05:20,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-12-14 12:05:20,484 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:05:20,484 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:05:20,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 12:05:20,485 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:05:20,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:05:20,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1136954368, now seen corresponding path program 1 times [2022-12-14 12:05:20,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:05:20,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924343531] [2022-12-14 12:05:20,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:05:20,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:05:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:05:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-12-14 12:05:20,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:05:20,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924343531] [2022-12-14 12:05:20,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924343531] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:05:20,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:05:20,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:05:20,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465184930] [2022-12-14 12:05:20,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:05:20,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:05:20,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:05:20,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:05:20,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:05:20,587 INFO L87 Difference]: Start difference. First operand 216019 states and 354921 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 12:05:49,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:05:49,173 INFO L93 Difference]: Finished difference Result 400857 states and 668293 transitions. [2022-12-14 12:05:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:05:49,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 223 [2022-12-14 12:05:49,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:05:51,130 INFO L225 Difference]: With dead ends: 400857 [2022-12-14 12:05:51,131 INFO L226 Difference]: Without dead ends: 218535 [2022-12-14 12:05:54,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:05:54,596 INFO L413 NwaCegarLoop]: 595 mSDtfsCounter, 29 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:05:54,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1140 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:05:54,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218535 states. [2022-12-14 12:06:15,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218535 to 216646. [2022-12-14 12:06:15,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216646 states, 150004 states have (on average 1.3392376203301246) internal successors, (200891), 158524 states have internal predecessors, (200891), 45126 states have call successors, (45126), 17584 states have call predecessors, (45126), 21515 states have return successors, (110103), 44500 states have call predecessors, (110103), 44914 states have call successors, (110103) [2022-12-14 12:06:19,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216646 states to 216646 states and 356120 transitions. [2022-12-14 12:06:19,714 INFO L78 Accepts]: Start accepts. Automaton has 216646 states and 356120 transitions. Word has length 223 [2022-12-14 12:06:19,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:06:19,715 INFO L495 AbstractCegarLoop]: Abstraction has 216646 states and 356120 transitions. [2022-12-14 12:06:19,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 12:06:19,715 INFO L276 IsEmpty]: Start isEmpty. Operand 216646 states and 356120 transitions. [2022-12-14 12:06:19,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-12-14 12:06:19,731 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:06:19,731 INFO L195 NwaCegarLoop]: trace histogram [11, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:06:19,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-14 12:06:19,731 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:06:19,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:06:19,731 INFO L85 PathProgramCache]: Analyzing trace with hash -602640404, now seen corresponding path program 1 times [2022-12-14 12:06:19,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:06:19,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187158022] [2022-12-14 12:06:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:06:19,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:06:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:06:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-12-14 12:06:20,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:06:20,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187158022] [2022-12-14 12:06:20,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187158022] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:06:20,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028804248] [2022-12-14 12:06:20,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:06:20,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:06:20,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:06:20,021 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:06:20,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02aa2436-0fa1-4329-9b7a-a2706ac09898/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 12:06:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:06:20,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 2671 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 12:06:20,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:06:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 99 proven. 21 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-12-14 12:06:20,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:06:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-12-14 12:06:20,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028804248] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:06:20,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1467409436] [2022-12-14 12:06:20,607 INFO L159 IcfgInterpreter]: Started Sifa with 127 locations of interest [2022-12-14 12:06:20,607 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:06:20,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:06:20,608 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:06:20,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs