./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur --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 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 --- 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-38b53e6 [2022-11-26 01:04:34,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:04:34,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:04:34,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:04:34,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:04:34,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:04:34,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:04:34,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:04:34,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:04:34,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:04:34,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:04:34,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:04:34,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:04:34,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:04:34,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:04:34,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:04:34,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:04:34,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:04:34,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:04:34,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:04:34,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:04:34,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:04:34,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:04:34,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:04:34,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:04:34,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:04:34,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:04:34,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:04:34,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:04:34,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:04:34,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:04:34,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:04:34,848 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:04:34,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:04:34,850 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:04:34,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:04:34,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:04:34,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:04:34,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:04:34,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:04:34,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:04:34,856 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 01:04:34,896 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:04:34,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:04:34,898 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:04:34,898 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:04:34,899 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:04:34,899 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:04:34,899 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:04:34,899 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:04:34,899 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:04:34,900 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:04:34,901 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:04:34,901 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:04:34,901 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:04:34,901 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:04:34,902 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:04:34,902 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:04:34,902 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:04:34,902 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:04:34,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:04:34,903 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:04:34,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:04:34,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:04:34,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:04:34,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:04:34,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:04:34,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:04:34,905 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:04:34,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:04:34,905 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:04:34,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:04:34,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:04:34,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:04:34,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:04:34,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:04:34,907 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:04:34,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:04:34,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:04:34,907 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:04:34,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:04:34,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:04:34,908 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:04:34,908 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_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 [2022-11-26 01:04:35,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:04:35,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:04:35,278 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:04:35,279 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:04:35,280 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:04:35,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2022-11-26 01:04:38,472 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:04:38,869 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:04:38,871 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2022-11-26 01:04:38,900 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/data/fce8b4232/c2abc138411e46ce8f5d3e638620a4ad/FLAGed59bd2bc [2022-11-26 01:04:38,918 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/data/fce8b4232/c2abc138411e46ce8f5d3e638620a4ad [2022-11-26 01:04:38,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:04:38,924 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:04:38,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:04:38,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:04:38,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:04:38,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:04:38" (1/1) ... [2022-11-26 01:04:38,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58f64b82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:38, skipping insertion in model container [2022-11-26 01:04:38,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:04:38" (1/1) ... [2022-11-26 01:04:38,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:04:39,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:04:39,423 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_7928f857-6825-48da-b159-4372e3cc43ef/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2022-11-26 01:04:39,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:04:39,622 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:04:39,715 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_7928f857-6825-48da-b159-4372e3cc43ef/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2022-11-26 01:04:39,784 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:04:39,811 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:04:39,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:39 WrapperNode [2022-11-26 01:04:39,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:04:39,813 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:04:39,813 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:04:39,813 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:04:39,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:39" (1/1) ... [2022-11-26 01:04:39,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:39" (1/1) ... [2022-11-26 01:04:39,951 INFO L138 Inliner]: procedures = 91, calls = 347, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 928 [2022-11-26 01:04:39,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:04:39,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:04:39,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:04:39,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:04:39,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:39" (1/1) ... [2022-11-26 01:04:39,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:39" (1/1) ... [2022-11-26 01:04:39,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:39" (1/1) ... [2022-11-26 01:04:39,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:39" (1/1) ... [2022-11-26 01:04:40,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:39" (1/1) ... [2022-11-26 01:04:40,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:39" (1/1) ... [2022-11-26 01:04:40,043 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:39" (1/1) ... [2022-11-26 01:04:40,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:39" (1/1) ... [2022-11-26 01:04:40,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:04:40,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:04:40,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:04:40,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:04:40,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:39" (1/1) ... [2022-11-26 01:04:40,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:04:40,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:40,089 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:04:40,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:04:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:04:40,160 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-26 01:04:40,160 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-26 01:04:40,160 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-26 01:04:40,160 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-26 01:04:40,160 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-26 01:04:40,160 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-26 01:04:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-26 01:04:40,161 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-26 01:04:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-26 01:04:40,161 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-26 01:04:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-26 01:04:40,161 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-26 01:04:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-26 01:04:40,162 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-26 01:04:40,162 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-26 01:04:40,162 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-26 01:04:40,162 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-26 01:04:40,162 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-26 01:04:40,162 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-26 01:04:40,163 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-26 01:04:40,163 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-26 01:04:40,164 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-26 01:04:40,164 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-26 01:04:40,164 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-26 01:04:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-26 01:04:40,165 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-26 01:04:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-26 01:04:40,166 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-26 01:04:40,166 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-26 01:04:40,167 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-26 01:04:40,168 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-26 01:04:40,168 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-26 01:04:40,168 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-26 01:04:40,168 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-26 01:04:40,168 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-26 01:04:40,169 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-26 01:04:40,169 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-26 01:04:40,169 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-26 01:04:40,169 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-26 01:04:40,169 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-26 01:04:40,169 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-26 01:04:40,170 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-26 01:04:40,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:04:40,170 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-26 01:04:40,170 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-26 01:04:40,171 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-26 01:04:40,171 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-26 01:04:40,171 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-26 01:04:40,172 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-26 01:04:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-26 01:04:40,172 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-26 01:04:40,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:04:40,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:04:40,173 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-26 01:04:40,173 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-26 01:04:40,350 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:04:40,353 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:04:41,812 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:04:42,675 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:04:42,676 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 01:04:42,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:04:42 BoogieIcfgContainer [2022-11-26 01:04:42,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:04:42,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:04:42,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:04:42,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:04:42,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:04:38" (1/3) ... [2022-11-26 01:04:42,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7a34b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:04:42, skipping insertion in model container [2022-11-26 01:04:42,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:39" (2/3) ... [2022-11-26 01:04:42,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7a34b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:04:42, skipping insertion in model container [2022-11-26 01:04:42,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:04:42" (3/3) ... [2022-11-26 01:04:42,693 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product29.cil.c [2022-11-26 01:04:42,714 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:04:42,714 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:04:42,796 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:04:42,804 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;@10840623, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:04:42,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:04:42,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2022-11-26 01:04:42,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 01:04:42,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:42,847 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] [2022-11-26 01:04:42,847 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:42,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:42,855 INFO L85 PathProgramCache]: Analyzing trace with hash -414763503, now seen corresponding path program 1 times [2022-11-26 01:04:42,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:42,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278962456] [2022-11-26 01:04:42,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:42,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:04:43,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:43,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278962456] [2022-11-26 01:04:43,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278962456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:43,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:04:43,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 01:04:43,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223955892] [2022-11-26 01:04:43,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:43,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:04:43,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:43,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:04:43,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:04:43,943 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-26 01:04:45,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:45,314 INFO L93 Difference]: Finished difference Result 1150 states and 1839 transitions. [2022-11-26 01:04:45,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:04:45,318 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2022-11-26 01:04:45,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:45,351 INFO L225 Difference]: With dead ends: 1150 [2022-11-26 01:04:45,354 INFO L226 Difference]: Without dead ends: 748 [2022-11-26 01:04:45,367 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 [2022-11-26 01:04:45,371 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 546 mSDsluCounter, 2336 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 2990 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:45,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 2990 Invalid, 927 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [158 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 01:04:45,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-11-26 01:04:45,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 740. [2022-11-26 01:04:45,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 497 states have (on average 1.5010060362173039) internal successors, (746), 527 states have internal predecessors, (746), 196 states have call successors, (196), 49 states have call predecessors, (196), 46 states have return successors, (197), 188 states have call predecessors, (197), 192 states have call successors, (197) [2022-11-26 01:04:45,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1139 transitions. [2022-11-26 01:04:45,545 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1139 transitions. Word has length 75 [2022-11-26 01:04:45,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:45,551 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1139 transitions. [2022-11-26 01:04:45,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-26 01:04:45,552 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1139 transitions. [2022-11-26 01:04:45,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-26 01:04:45,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:45,562 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] [2022-11-26 01:04:45,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 01:04:45,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:45,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:45,563 INFO L85 PathProgramCache]: Analyzing trace with hash -415147964, now seen corresponding path program 1 times [2022-11-26 01:04:45,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:45,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961499020] [2022-11-26 01:04:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:45,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:04:46,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:46,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961499020] [2022-11-26 01:04:46,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961499020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:46,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:04:46,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 01:04:46,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318451992] [2022-11-26 01:04:46,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:46,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:04:46,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:46,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:04:46,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:04:46,146 INFO L87 Difference]: Start difference. First operand 740 states and 1139 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-26 01:04:47,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:47,453 INFO L93 Difference]: Finished difference Result 2669 states and 4283 transitions. [2022-11-26 01:04:47,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:04:47,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 80 [2022-11-26 01:04:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:47,469 INFO L225 Difference]: With dead ends: 2669 [2022-11-26 01:04:47,469 INFO L226 Difference]: Without dead ends: 1941 [2022-11-26 01:04:47,476 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 [2022-11-26 01:04:47,477 INFO L413 NwaCegarLoop]: 922 mSDtfsCounter, 849 mSDsluCounter, 3111 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 4033 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:47,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [921 Valid, 4033 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 01:04:47,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2022-11-26 01:04:47,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1387. [2022-11-26 01:04:47,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 949 states have (on average 1.5047418335089568) internal successors, (1428), 1007 states have internal predecessors, (1428), 351 states have call successors, (351), 91 states have call predecessors, (351), 86 states have return successors, (380), 326 states have call predecessors, (380), 345 states have call successors, (380) [2022-11-26 01:04:47,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 2159 transitions. [2022-11-26 01:04:47,596 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 2159 transitions. Word has length 80 [2022-11-26 01:04:47,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:47,597 INFO L495 AbstractCegarLoop]: Abstraction has 1387 states and 2159 transitions. [2022-11-26 01:04:47,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-26 01:04:47,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 2159 transitions. [2022-11-26 01:04:47,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-26 01:04:47,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:47,600 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] [2022-11-26 01:04:47,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 01:04:47,600 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:47,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:47,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1728178894, now seen corresponding path program 1 times [2022-11-26 01:04:47,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:47,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201823022] [2022-11-26 01:04:47,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:47,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:04:47,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:47,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201823022] [2022-11-26 01:04:47,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201823022] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:47,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201833528] [2022-11-26 01:04:47,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:47,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:47,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:47,940 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:47,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:04:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:48,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:04:48,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:48,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:04:48,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201833528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:48,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:04:48,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 01:04:48,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891957849] [2022-11-26 01:04:48,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:48,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:04:48,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:48,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:04:48,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:04:48,469 INFO L87 Difference]: Start difference. First operand 1387 states and 2159 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-26 01:04:48,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:48,852 INFO L93 Difference]: Finished difference Result 3959 states and 6319 transitions. [2022-11-26 01:04:48,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:04:48,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 79 [2022-11-26 01:04:48,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:48,873 INFO L225 Difference]: With dead ends: 3959 [2022-11-26 01:04:48,874 INFO L226 Difference]: Without dead ends: 2584 [2022-11-26 01:04:48,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:04:48,888 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 562 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:48,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 1173 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:04:48,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2022-11-26 01:04:49,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2509. [2022-11-26 01:04:49,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 1727 states have (on average 1.5176606832657789) internal successors, (2621), 1843 states have internal predecessors, (2621), 620 states have call successors, (620), 162 states have call predecessors, (620), 161 states have return successors, (700), 579 states have call predecessors, (700), 614 states have call successors, (700) [2022-11-26 01:04:49,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3941 transitions. [2022-11-26 01:04:49,103 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3941 transitions. Word has length 79 [2022-11-26 01:04:49,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:49,104 INFO L495 AbstractCegarLoop]: Abstraction has 2509 states and 3941 transitions. [2022-11-26 01:04:49,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-26 01:04:49,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3941 transitions. [2022-11-26 01:04:49,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-26 01:04:49,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:49,108 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] [2022-11-26 01:04:49,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 01:04:49,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:49,318 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:49,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:49,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1342972250, now seen corresponding path program 1 times [2022-11-26 01:04:49,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:49,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341805242] [2022-11-26 01:04:49,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:49,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:04:49,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:49,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341805242] [2022-11-26 01:04:49,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341805242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:49,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202000446] [2022-11-26 01:04:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:49,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:49,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:49,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:49,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:04:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:50,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 1582 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:04:50,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:50,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:04:50,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202000446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:50,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:04:50,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 01:04:50,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302722468] [2022-11-26 01:04:50,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:50,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:04:50,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:50,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:04:50,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:04:50,183 INFO L87 Difference]: Start difference. First operand 2509 states and 3941 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-26 01:04:50,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:50,591 INFO L93 Difference]: Finished difference Result 5622 states and 8926 transitions. [2022-11-26 01:04:50,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:04:50,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 81 [2022-11-26 01:04:50,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:50,619 INFO L225 Difference]: With dead ends: 5622 [2022-11-26 01:04:50,619 INFO L226 Difference]: Without dead ends: 3125 [2022-11-26 01:04:50,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:04:50,641 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 559 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:50,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 1176 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:04:50,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2022-11-26 01:04:50,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 3082. [2022-11-26 01:04:50,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 2129 states have (on average 1.5274776890558948) internal successors, (3252), 2274 states have internal predecessors, (3252), 755 states have call successors, (755), 196 states have call predecessors, (755), 197 states have return successors, (854), 707 states have call predecessors, (854), 749 states have call successors, (854) [2022-11-26 01:04:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 4861 transitions. [2022-11-26 01:04:50,870 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 4861 transitions. Word has length 81 [2022-11-26 01:04:50,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:50,873 INFO L495 AbstractCegarLoop]: Abstraction has 3082 states and 4861 transitions. [2022-11-26 01:04:50,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-26 01:04:50,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 4861 transitions. [2022-11-26 01:04:50,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-26 01:04:50,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:50,878 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] [2022-11-26 01:04:50,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:04:51,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:51,087 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:51,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:51,088 INFO L85 PathProgramCache]: Analyzing trace with hash 993443125, now seen corresponding path program 1 times [2022-11-26 01:04:51,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:51,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88743904] [2022-11-26 01:04:51,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:51,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:04:51,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:51,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88743904] [2022-11-26 01:04:51,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88743904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:51,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032447278] [2022-11-26 01:04:51,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:51,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:51,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:51,850 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:51,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:04:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:52,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 1608 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:04:52,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:04:52,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:04:52,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032447278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:52,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:04:52,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-26 01:04:52,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705718970] [2022-11-26 01:04:52,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:52,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:04:52,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:52,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:04:52,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-26 01:04:52,316 INFO L87 Difference]: Start difference. First operand 3082 states and 4861 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-26 01:04:52,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:52,945 INFO L93 Difference]: Finished difference Result 6167 states and 9944 transitions. [2022-11-26 01:04:52,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:04:52,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 86 [2022-11-26 01:04:52,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:52,976 INFO L225 Difference]: With dead ends: 6167 [2022-11-26 01:04:52,976 INFO L226 Difference]: Without dead ends: 3902 [2022-11-26 01:04:52,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:04:52,999 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 210 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 2430 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:53,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 2430 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:04:53,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2022-11-26 01:04:53,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3286. [2022-11-26 01:04:53,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 2271 states have (on average 1.520035226772347) internal successors, (3452), 2437 states have internal predecessors, (3452), 814 states have call successors, (814), 196 states have call predecessors, (814), 200 states have return successors, (925), 766 states have call predecessors, (925), 808 states have call successors, (925) [2022-11-26 01:04:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 5191 transitions. [2022-11-26 01:04:53,339 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 5191 transitions. Word has length 86 [2022-11-26 01:04:53,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:53,339 INFO L495 AbstractCegarLoop]: Abstraction has 3286 states and 5191 transitions. [2022-11-26 01:04:53,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-26 01:04:53,340 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 5191 transitions. [2022-11-26 01:04:53,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-26 01:04:53,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:53,349 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] [2022-11-26 01:04:53,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:04:53,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:53,562 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:53,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:53,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1702584009, now seen corresponding path program 1 times [2022-11-26 01:04:53,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:53,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140389943] [2022-11-26 01:04:53,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:53,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 01:04:54,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:54,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140389943] [2022-11-26 01:04:54,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140389943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:54,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893437303] [2022-11-26 01:04:54,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:54,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:54,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:54,311 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:54,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:04:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:54,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 1614 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:04:54,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 01:04:54,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:04:54,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893437303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:54,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:04:54,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-26 01:04:54,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199246635] [2022-11-26 01:04:54,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:54,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:04:54,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:54,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:04:54,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:04:54,958 INFO L87 Difference]: Start difference. First operand 3286 states and 5191 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-26 01:04:56,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:56,149 INFO L93 Difference]: Finished difference Result 5778 states and 9149 transitions. [2022-11-26 01:04:56,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:04:56,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 88 [2022-11-26 01:04:56,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:56,176 INFO L225 Difference]: With dead ends: 5778 [2022-11-26 01:04:56,177 INFO L226 Difference]: Without dead ends: 3325 [2022-11-26 01:04:56,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-26 01:04:56,194 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 491 mSDsluCounter, 2463 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 3184 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:56,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 3184 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 01:04:56,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3325 states. [2022-11-26 01:04:56,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3325 to 3322. [2022-11-26 01:04:56,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 2295 states have (on average 1.5145969498910676) internal successors, (3476), 2457 states have internal predecessors, (3476), 814 states have call successors, (814), 200 states have call predecessors, (814), 212 states have return successors, (941), 778 states have call predecessors, (941), 808 states have call successors, (941) [2022-11-26 01:04:56,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 5231 transitions. [2022-11-26 01:04:56,451 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 5231 transitions. Word has length 88 [2022-11-26 01:04:56,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:56,452 INFO L495 AbstractCegarLoop]: Abstraction has 3322 states and 5231 transitions. [2022-11-26 01:04:56,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-26 01:04:56,452 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 5231 transitions. [2022-11-26 01:04:56,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-26 01:04:56,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:56,456 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] [2022-11-26 01:04:56,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-26 01:04:56,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:56,663 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:56,664 INFO L85 PathProgramCache]: Analyzing trace with hash 896215998, now seen corresponding path program 1 times [2022-11-26 01:04:56,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:56,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822042819] [2022-11-26 01:04:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:56,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:57,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 01:04:57,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:57,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822042819] [2022-11-26 01:04:57,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822042819] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:57,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238623603] [2022-11-26 01:04:57,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:57,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:57,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:57,427 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:57,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:04:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:57,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 1613 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 01:04:57,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 01:04:57,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:04:57,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238623603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:57,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:04:57,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-11-26 01:04:57,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448824079] [2022-11-26 01:04:57,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:57,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:04:57,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:57,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:04:57,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-26 01:04:57,867 INFO L87 Difference]: Start difference. First operand 3322 states and 5231 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-26 01:04:58,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:58,365 INFO L93 Difference]: Finished difference Result 6163 states and 9951 transitions. [2022-11-26 01:04:58,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:04:58,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 92 [2022-11-26 01:04:58,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:58,389 INFO L225 Difference]: With dead ends: 6163 [2022-11-26 01:04:58,390 INFO L226 Difference]: Without dead ends: 3674 [2022-11-26 01:04:58,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-26 01:04:58,414 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 219 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:58,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1594 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:04:58,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2022-11-26 01:04:58,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3674. [2022-11-26 01:04:58,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 2637 states have (on average 1.5297686765263556) internal successors, (4034), 2809 states have internal predecessors, (4034), 814 states have call successors, (814), 200 states have call predecessors, (814), 222 states have return successors, (971), 778 states have call predecessors, (971), 808 states have call successors, (971) [2022-11-26 01:04:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 5819 transitions. [2022-11-26 01:04:58,686 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 5819 transitions. Word has length 92 [2022-11-26 01:04:58,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:58,686 INFO L495 AbstractCegarLoop]: Abstraction has 3674 states and 5819 transitions. [2022-11-26 01:04:58,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-26 01:04:58,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 5819 transitions. [2022-11-26 01:04:58,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-26 01:04:58,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:58,690 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] [2022-11-26 01:04:58,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-26 01:04:58,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 01:04:58,899 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:58,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:58,900 INFO L85 PathProgramCache]: Analyzing trace with hash -141184640, now seen corresponding path program 1 times [2022-11-26 01:04:58,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:58,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54562025] [2022-11-26 01:04:58,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:58,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:59,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 01:04:59,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:59,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54562025] [2022-11-26 01:04:59,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54562025] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:59,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731253832] [2022-11-26 01:04:59,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:59,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:59,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:59,523 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:59,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:04:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:59,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 1614 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 01:04:59,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 01:05:00,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:05:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 01:05:00,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731253832] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:00,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:05:00,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-11-26 01:05:00,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208495614] [2022-11-26 01:05:00,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:00,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 01:05:00,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:00,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 01:05:00,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-26 01:05:00,489 INFO L87 Difference]: Start difference. First operand 3674 states and 5819 transitions. Second operand has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-26 01:05:04,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:04,833 INFO L93 Difference]: Finished difference Result 9688 states and 16293 transitions. [2022-11-26 01:05:04,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 01:05:04,835 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 92 [2022-11-26 01:05:04,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:04,960 INFO L225 Difference]: With dead ends: 9688 [2022-11-26 01:05:04,961 INFO L226 Difference]: Without dead ends: 7335 [2022-11-26 01:05:04,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 01:05:04,991 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 2577 mSDsluCounter, 2379 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 1229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2664 SdHoareTripleChecker+Valid, 3096 SdHoareTripleChecker+Invalid, 3943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1229 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:04,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2664 Valid, 3096 Invalid, 3943 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1229 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-26 01:05:05,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7335 states. [2022-11-26 01:05:05,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7335 to 6840. [2022-11-26 01:05:05,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 5049 states have (on average 1.5444642503466033) internal successors, (7798), 5313 states have internal predecessors, (7798), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 445 states have return successors, (1996), 1292 states have call predecessors, (1996), 1337 states have call successors, (1996) [2022-11-26 01:05:05,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 11139 transitions. [2022-11-26 01:05:05,724 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 11139 transitions. Word has length 92 [2022-11-26 01:05:05,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:05,725 INFO L495 AbstractCegarLoop]: Abstraction has 6840 states and 11139 transitions. [2022-11-26 01:05:05,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-26 01:05:05,726 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 11139 transitions. [2022-11-26 01:05:05,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-26 01:05:05,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:05,730 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] [2022-11-26 01:05:05,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:05,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:05,944 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:05,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:05,944 INFO L85 PathProgramCache]: Analyzing trace with hash -292146092, now seen corresponding path program 1 times [2022-11-26 01:05:05,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:05,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156276556] [2022-11-26 01:05:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:05,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 01:05:06,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:06,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156276556] [2022-11-26 01:05:06,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156276556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:06,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625910000] [2022-11-26 01:05:06,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:06,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:06,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:06,548 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:06,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:05:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:06,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 01:05:06,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 01:05:07,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:05:07,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625910000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:05:07,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:05:07,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-26 01:05:07,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79447806] [2022-11-26 01:05:07,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:07,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:05:07,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:07,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:05:07,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-26 01:05:07,079 INFO L87 Difference]: Start difference. First operand 6840 states and 11139 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-26 01:05:08,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:08,111 INFO L93 Difference]: Finished difference Result 12375 states and 20284 transitions. [2022-11-26 01:05:08,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:05:08,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) Word has length 95 [2022-11-26 01:05:08,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:08,216 INFO L225 Difference]: With dead ends: 12375 [2022-11-26 01:05:08,217 INFO L226 Difference]: Without dead ends: 6856 [2022-11-26 01:05:08,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:05:08,245 INFO L413 NwaCegarLoop]: 738 mSDtfsCounter, 420 mSDsluCounter, 1872 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 2610 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:08,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 2610 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:05:08,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6856 states. [2022-11-26 01:05:08,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6856 to 6840. [2022-11-26 01:05:08,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 5049 states have (on average 1.5444642503466033) internal successors, (7798), 5313 states have internal predecessors, (7798), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 445 states have return successors, (1988), 1292 states have call predecessors, (1988), 1337 states have call successors, (1988) [2022-11-26 01:05:08,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 11131 transitions. [2022-11-26 01:05:08,752 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 11131 transitions. Word has length 95 [2022-11-26 01:05:08,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:08,752 INFO L495 AbstractCegarLoop]: Abstraction has 6840 states and 11131 transitions. [2022-11-26 01:05:08,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-26 01:05:08,753 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 11131 transitions. [2022-11-26 01:05:08,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-26 01:05:08,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:08,758 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] [2022-11-26 01:05:08,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:08,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:08,966 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:08,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:08,967 INFO L85 PathProgramCache]: Analyzing trace with hash -584114713, now seen corresponding path program 1 times [2022-11-26 01:05:08,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:08,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452231695] [2022-11-26 01:05:08,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:08,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 01:05:09,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:09,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452231695] [2022-11-26 01:05:09,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452231695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:09,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524209690] [2022-11-26 01:05:09,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:09,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:09,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:09,714 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:09,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 01:05:10,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:10,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 1741 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:05:10,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 01:05:10,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:05:10,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524209690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:05:10,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:05:10,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-26 01:05:10,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83398348] [2022-11-26 01:05:10,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:10,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:05:10,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:10,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:05:10,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:05:10,189 INFO L87 Difference]: Start difference. First operand 6840 states and 11131 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 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) [2022-11-26 01:05:10,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:10,868 INFO L93 Difference]: Finished difference Result 13215 states and 22058 transitions. [2022-11-26 01:05:10,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:05:10,869 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 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 122 [2022-11-26 01:05:10,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:10,930 INFO L225 Difference]: With dead ends: 13215 [2022-11-26 01:05:10,931 INFO L226 Difference]: Without dead ends: 7220 [2022-11-26 01:05:11,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:05:11,096 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 13 mSDsluCounter, 3022 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3636 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:11,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3636 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:05:11,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7220 states. [2022-11-26 01:05:11,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7220 to 7068. [2022-11-26 01:05:11,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7068 states, 5193 states have (on average 1.5293664548430579) internal successors, (7942), 5497 states have internal predecessors, (7942), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 529 states have return successors, (2453), 1336 states have call predecessors, (2453), 1337 states have call successors, (2453) [2022-11-26 01:05:11,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7068 states to 7068 states and 11740 transitions. [2022-11-26 01:05:11,806 INFO L78 Accepts]: Start accepts. Automaton has 7068 states and 11740 transitions. Word has length 122 [2022-11-26 01:05:11,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:11,807 INFO L495 AbstractCegarLoop]: Abstraction has 7068 states and 11740 transitions. [2022-11-26 01:05:11,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 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) [2022-11-26 01:05:11,807 INFO L276 IsEmpty]: Start isEmpty. Operand 7068 states and 11740 transitions. [2022-11-26 01:05:11,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-26 01:05:11,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:11,812 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] [2022-11-26 01:05:11,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:12,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 01:05:12,020 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:12,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:12,021 INFO L85 PathProgramCache]: Analyzing trace with hash 31459966, now seen corresponding path program 1 times [2022-11-26 01:05:12,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:12,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003965836] [2022-11-26 01:05:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:12,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 01:05:12,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:12,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003965836] [2022-11-26 01:05:12,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003965836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:12,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440938067] [2022-11-26 01:05:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:12,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:12,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:12,651 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:12,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 01:05:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:13,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:05:13,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 01:05:13,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:05:13,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440938067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:05:13,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:05:13,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-26 01:05:13,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145943225] [2022-11-26 01:05:13,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:13,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:05:13,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:13,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:05:13,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:05:13,199 INFO L87 Difference]: Start difference. First operand 7068 states and 11740 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 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) [2022-11-26 01:05:13,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:13,860 INFO L93 Difference]: Finished difference Result 13551 states and 22861 transitions. [2022-11-26 01:05:13,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:05:13,861 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 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 124 [2022-11-26 01:05:13,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:13,919 INFO L225 Difference]: With dead ends: 13551 [2022-11-26 01:05:13,919 INFO L226 Difference]: Without dead ends: 7336 [2022-11-26 01:05:13,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:05:13,965 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 13 mSDsluCounter, 3038 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3656 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:13,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3656 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:05:13,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7336 states. [2022-11-26 01:05:14,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7336 to 7096. [2022-11-26 01:05:14,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7096 states, 5221 states have (on average 1.5265274851561004) internal successors, (7970), 5497 states have internal predecessors, (7970), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 529 states have return successors, (2453), 1364 states have call predecessors, (2453), 1337 states have call successors, (2453) [2022-11-26 01:05:14,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7096 states to 7096 states and 11768 transitions. [2022-11-26 01:05:14,556 INFO L78 Accepts]: Start accepts. Automaton has 7096 states and 11768 transitions. Word has length 124 [2022-11-26 01:05:14,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:14,556 INFO L495 AbstractCegarLoop]: Abstraction has 7096 states and 11768 transitions. [2022-11-26 01:05:14,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 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) [2022-11-26 01:05:14,557 INFO L276 IsEmpty]: Start isEmpty. Operand 7096 states and 11768 transitions. [2022-11-26 01:05:14,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-26 01:05:14,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:14,564 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] [2022-11-26 01:05:14,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:14,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 01:05:14,772 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:14,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:14,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1110943576, now seen corresponding path program 1 times [2022-11-26 01:05:14,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:14,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865779255] [2022-11-26 01:05:14,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:14,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 01:05:15,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:15,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865779255] [2022-11-26 01:05:15,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865779255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:15,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517801373] [2022-11-26 01:05:15,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:15,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:15,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:15,373 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:15,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 01:05:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:15,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:05:15,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 01:05:15,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:05:15,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517801373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:05:15,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:05:15,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-11-26 01:05:15,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277570834] [2022-11-26 01:05:15,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:15,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:05:15,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:15,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:05:15,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-26 01:05:15,775 INFO L87 Difference]: Start difference. First operand 7096 states and 11768 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2022-11-26 01:05:16,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:16,458 INFO L93 Difference]: Finished difference Result 14754 states and 25979 transitions. [2022-11-26 01:05:16,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:05:16,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 124 [2022-11-26 01:05:16,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:16,517 INFO L225 Difference]: With dead ends: 14754 [2022-11-26 01:05:16,517 INFO L226 Difference]: Without dead ends: 8491 [2022-11-26 01:05:16,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-26 01:05:16,560 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 71 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:16,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 1227 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:05:16,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8491 states. [2022-11-26 01:05:17,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8491 to 8026. [2022-11-26 01:05:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8026 states, 6064 states have (on average 1.524571240105541) internal successors, (9245), 6340 states have internal predecessors, (9245), 1432 states have call successors, (1432), 378 states have call predecessors, (1432), 529 states have return successors, (2540), 1451 states have call predecessors, (2540), 1424 states have call successors, (2540) [2022-11-26 01:05:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8026 states to 8026 states and 13217 transitions. [2022-11-26 01:05:17,147 INFO L78 Accepts]: Start accepts. Automaton has 8026 states and 13217 transitions. Word has length 124 [2022-11-26 01:05:17,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:17,147 INFO L495 AbstractCegarLoop]: Abstraction has 8026 states and 13217 transitions. [2022-11-26 01:05:17,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2022-11-26 01:05:17,148 INFO L276 IsEmpty]: Start isEmpty. Operand 8026 states and 13217 transitions. [2022-11-26 01:05:17,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-26 01:05:17,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:17,154 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-26 01:05:17,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:17,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 01:05:17,363 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:17,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:17,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1026462550, now seen corresponding path program 1 times [2022-11-26 01:05:17,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:17,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117273315] [2022-11-26 01:05:17,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:17,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 01:05:18,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:18,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117273315] [2022-11-26 01:05:18,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117273315] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:18,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306298292] [2022-11-26 01:05:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:18,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:18,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:18,134 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:18,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 01:05:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:18,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:05:18,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 01:05:18,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:05:18,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306298292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:05:18,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:05:18,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-26 01:05:18,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875197812] [2022-11-26 01:05:18,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:18,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:05:18,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:18,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:05:18,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:05:18,598 INFO L87 Difference]: Start difference. First operand 8026 states and 13217 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, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-26 01:05:19,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:19,455 INFO L93 Difference]: Finished difference Result 15467 states and 25815 transitions. [2022-11-26 01:05:19,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:05:19,456 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, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) Word has length 128 [2022-11-26 01:05:19,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:19,533 INFO L225 Difference]: With dead ends: 15467 [2022-11-26 01:05:19,533 INFO L226 Difference]: Without dead ends: 8294 [2022-11-26 01:05:19,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:05:19,590 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 13 mSDsluCounter, 3018 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3631 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:19,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3631 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:05:19,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8294 states. [2022-11-26 01:05:20,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8294 to 8054. [2022-11-26 01:05:20,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8054 states, 6092 states have (on average 1.5221602101116218) internal successors, (9273), 6340 states have internal predecessors, (9273), 1432 states have call successors, (1432), 378 states have call predecessors, (1432), 529 states have return successors, (2540), 1479 states have call predecessors, (2540), 1424 states have call successors, (2540) [2022-11-26 01:05:20,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8054 states to 8054 states and 13245 transitions. [2022-11-26 01:05:20,290 INFO L78 Accepts]: Start accepts. Automaton has 8054 states and 13245 transitions. Word has length 128 [2022-11-26 01:05:20,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:20,291 INFO L495 AbstractCegarLoop]: Abstraction has 8054 states and 13245 transitions. [2022-11-26 01:05:20,291 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, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-26 01:05:20,291 INFO L276 IsEmpty]: Start isEmpty. Operand 8054 states and 13245 transitions. [2022-11-26 01:05:20,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-26 01:05:20,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:20,299 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] [2022-11-26 01:05:20,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:20,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:20,507 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:20,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:20,507 INFO L85 PathProgramCache]: Analyzing trace with hash -501436400, now seen corresponding path program 1 times [2022-11-26 01:05:20,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:20,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378959385] [2022-11-26 01:05:20,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:20,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 01:05:21,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:21,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378959385] [2022-11-26 01:05:21,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378959385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:21,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620020950] [2022-11-26 01:05:21,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:21,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:21,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:21,091 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:21,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 01:05:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:21,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 1746 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 01:05:21,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 01:05:21,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:05:21,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620020950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:05:21,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:05:21,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-26 01:05:21,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765676476] [2022-11-26 01:05:21,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:21,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:05:21,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:21,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:05:21,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-26 01:05:21,578 INFO L87 Difference]: Start difference. First operand 8054 states and 13245 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-26 01:05:22,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:22,311 INFO L93 Difference]: Finished difference Result 15943 states and 26698 transitions. [2022-11-26 01:05:22,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:05:22,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 132 [2022-11-26 01:05:22,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:22,362 INFO L225 Difference]: With dead ends: 15943 [2022-11-26 01:05:22,363 INFO L226 Difference]: Without dead ends: 6778 [2022-11-26 01:05:22,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-26 01:05:22,415 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 226 mSDsluCounter, 2230 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 2852 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:22,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 2852 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:05:22,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6778 states. [2022-11-26 01:05:22,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6778 to 6778. [2022-11-26 01:05:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6778 states, 4954 states have (on average 1.4745660072668552) internal successors, (7305), 5200 states have internal predecessors, (7305), 1312 states have call successors, (1312), 372 states have call predecessors, (1312), 511 states have return successors, (2384), 1349 states have call predecessors, (2384), 1304 states have call successors, (2384) [2022-11-26 01:05:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 11001 transitions. [2022-11-26 01:05:22,990 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 11001 transitions. Word has length 132 [2022-11-26 01:05:22,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:22,990 INFO L495 AbstractCegarLoop]: Abstraction has 6778 states and 11001 transitions. [2022-11-26 01:05:22,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-26 01:05:22,991 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 11001 transitions. [2022-11-26 01:05:23,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-26 01:05:23,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:23,000 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] [2022-11-26 01:05:23,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:23,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:23,208 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:23,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:23,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1769883872, now seen corresponding path program 1 times [2022-11-26 01:05:23,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:23,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888205809] [2022-11-26 01:05:23,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:23,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 01:05:23,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:23,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888205809] [2022-11-26 01:05:23,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888205809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:23,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134919989] [2022-11-26 01:05:23,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:23,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:23,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:23,775 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:23,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 01:05:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:24,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 01:05:24,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 01:05:24,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:05:24,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134919989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:05:24,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:05:24,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-26 01:05:24,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238391765] [2022-11-26 01:05:24,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:24,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:05:24,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:24,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:05:24,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-26 01:05:24,249 INFO L87 Difference]: Start difference. First operand 6778 states and 11001 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, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-26 01:05:25,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:25,033 INFO L93 Difference]: Finished difference Result 14920 states and 24634 transitions. [2022-11-26 01:05:25,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:05:25,033 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, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 136 [2022-11-26 01:05:25,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:25,077 INFO L225 Difference]: With dead ends: 14920 [2022-11-26 01:05:25,078 INFO L226 Difference]: Without dead ends: 7611 [2022-11-26 01:05:25,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-26 01:05:25,115 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 265 mSDsluCounter, 2252 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 2887 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:25,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 2887 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:05:25,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7611 states. [2022-11-26 01:05:25,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7611 to 7554. [2022-11-26 01:05:25,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7554 states, 5681 states have (on average 1.4673472980109137) internal successors, (8336), 5922 states have internal predecessors, (8336), 1338 states have call successors, (1338), 400 states have call predecessors, (1338), 534 states have return successors, (2234), 1375 states have call predecessors, (2234), 1330 states have call successors, (2234) [2022-11-26 01:05:25,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7554 states to 7554 states and 11908 transitions. [2022-11-26 01:05:25,659 INFO L78 Accepts]: Start accepts. Automaton has 7554 states and 11908 transitions. Word has length 136 [2022-11-26 01:05:25,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:25,660 INFO L495 AbstractCegarLoop]: Abstraction has 7554 states and 11908 transitions. [2022-11-26 01:05:25,660 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, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-26 01:05:25,660 INFO L276 IsEmpty]: Start isEmpty. Operand 7554 states and 11908 transitions. [2022-11-26 01:05:25,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-26 01:05:25,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:25,669 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] [2022-11-26 01:05:25,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:25,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 01:05:25,887 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:25,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:25,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1163519774, now seen corresponding path program 1 times [2022-11-26 01:05:25,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:25,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066193912] [2022-11-26 01:05:25,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:25,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 01:05:26,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:26,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066193912] [2022-11-26 01:05:26,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066193912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:26,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128450841] [2022-11-26 01:05:26,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:26,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:26,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:26,512 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:26,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 01:05:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:26,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 01:05:26,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 01:05:27,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:05:27,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128450841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:05:27,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:05:27,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-11-26 01:05:27,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621477960] [2022-11-26 01:05:27,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:27,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:05:27,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:27,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:05:27,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-26 01:05:27,496 INFO L87 Difference]: Start difference. First operand 7554 states and 11908 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-26 01:05:33,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:33,824 INFO L93 Difference]: Finished difference Result 30912 states and 50838 transitions. [2022-11-26 01:05:33,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 01:05:33,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) Word has length 137 [2022-11-26 01:05:33,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:33,972 INFO L225 Difference]: With dead ends: 30912 [2022-11-26 01:05:33,972 INFO L226 Difference]: Without dead ends: 23855 [2022-11-26 01:05:34,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-26 01:05:34,022 INFO L413 NwaCegarLoop]: 2190 mSDtfsCounter, 3015 mSDsluCounter, 4016 mSDsCounter, 0 mSdLazyCounter, 2887 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3030 SdHoareTripleChecker+Valid, 6206 SdHoareTripleChecker+Invalid, 3382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 2887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:34,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3030 Valid, 6206 Invalid, 3382 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [495 Valid, 2887 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-26 01:05:34,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23855 states. [2022-11-26 01:05:35,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23855 to 19866. [2022-11-26 01:05:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19866 states, 15275 states have (on average 1.4386252045826513) internal successors, (21975), 15749 states have internal predecessors, (21975), 3103 states have call successors, (3103), 1080 states have call predecessors, (3103), 1487 states have return successors, (6975), 3228 states have call predecessors, (6975), 3085 states have call successors, (6975) [2022-11-26 01:05:35,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19866 states to 19866 states and 32053 transitions. [2022-11-26 01:05:35,509 INFO L78 Accepts]: Start accepts. Automaton has 19866 states and 32053 transitions. Word has length 137 [2022-11-26 01:05:35,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:35,510 INFO L495 AbstractCegarLoop]: Abstraction has 19866 states and 32053 transitions. [2022-11-26 01:05:35,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-26 01:05:35,510 INFO L276 IsEmpty]: Start isEmpty. Operand 19866 states and 32053 transitions. [2022-11-26 01:05:35,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-26 01:05:35,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:35,532 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:35,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:35,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:35,740 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:35,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:35,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1226868321, now seen corresponding path program 1 times [2022-11-26 01:05:35,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:35,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127173718] [2022-11-26 01:05:35,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:35,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-26 01:05:36,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:36,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127173718] [2022-11-26 01:05:36,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127173718] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:36,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328072826] [2022-11-26 01:05:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:36,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:36,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:36,196 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:36,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 01:05:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:36,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 1973 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:05:36,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 01:05:36,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:05:36,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328072826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:05:36,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:05:36,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-26 01:05:36,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431026804] [2022-11-26 01:05:36,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:36,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:05:36,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:36,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:05:36,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:05:36,651 INFO L87 Difference]: Start difference. First operand 19866 states and 32053 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2022-11-26 01:05:38,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:38,351 INFO L93 Difference]: Finished difference Result 39717 states and 66864 transitions. [2022-11-26 01:05:38,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:05:38,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 139 [2022-11-26 01:05:38,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:38,474 INFO L225 Difference]: With dead ends: 39717 [2022-11-26 01:05:38,474 INFO L226 Difference]: Without dead ends: 22251 [2022-11-26 01:05:38,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:05:38,555 INFO L413 NwaCegarLoop]: 765 mSDtfsCounter, 105 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:38,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1369 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:05:38,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22251 states. [2022-11-26 01:05:40,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22251 to 20062. [2022-11-26 01:05:40,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20062 states, 15443 states have (on average 1.4356666450819142) internal successors, (22171), 15917 states have internal predecessors, (22171), 3131 states have call successors, (3131), 1080 states have call predecessors, (3131), 1487 states have return successors, (7003), 3256 states have call predecessors, (7003), 3113 states have call successors, (7003) [2022-11-26 01:05:40,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20062 states to 20062 states and 32305 transitions. [2022-11-26 01:05:40,795 INFO L78 Accepts]: Start accepts. Automaton has 20062 states and 32305 transitions. Word has length 139 [2022-11-26 01:05:40,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:40,796 INFO L495 AbstractCegarLoop]: Abstraction has 20062 states and 32305 transitions. [2022-11-26 01:05:40,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2022-11-26 01:05:40,796 INFO L276 IsEmpty]: Start isEmpty. Operand 20062 states and 32305 transitions. [2022-11-26 01:05:40,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-26 01:05:40,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:40,824 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:40,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:41,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-26 01:05:41,033 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:41,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:41,033 INFO L85 PathProgramCache]: Analyzing trace with hash 94562958, now seen corresponding path program 1 times [2022-11-26 01:05:41,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:41,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861068504] [2022-11-26 01:05:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:41,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-26 01:05:41,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:41,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861068504] [2022-11-26 01:05:41,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861068504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:41,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894402227] [2022-11-26 01:05:41,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:41,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:41,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:41,329 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:41,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 01:05:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:41,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 1974 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:05:41,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 01:05:41,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:05:41,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894402227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:05:41,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:05:41,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-26 01:05:41,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112120929] [2022-11-26 01:05:41,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:41,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:05:41,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:41,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:05:41,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-26 01:05:41,902 INFO L87 Difference]: Start difference. First operand 20062 states and 32305 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2022-11-26 01:05:47,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:47,481 INFO L93 Difference]: Finished difference Result 42989 states and 70658 transitions. [2022-11-26 01:05:47,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-26 01:05:47,482 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) Word has length 139 [2022-11-26 01:05:47,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:47,838 INFO L225 Difference]: With dead ends: 42989 [2022-11-26 01:05:47,838 INFO L226 Difference]: Without dead ends: 22496 [2022-11-26 01:05:47,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-11-26 01:05:47,933 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 1729 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 3853 mSolverCounterSat, 1107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1765 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 4960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1107 IncrementalHoareTripleChecker+Valid, 3853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:47,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1765 Valid, 1720 Invalid, 4960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1107 Valid, 3853 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-26 01:05:47,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22496 states. [2022-11-26 01:05:49,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22496 to 20042. [2022-11-26 01:05:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20042 states, 15423 states have (on average 1.4359722492381508) internal successors, (22147), 15897 states have internal predecessors, (22147), 3131 states have call successors, (3131), 1080 states have call predecessors, (3131), 1487 states have return successors, (7003), 3256 states have call predecessors, (7003), 3113 states have call successors, (7003) [2022-11-26 01:05:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20042 states to 20042 states and 32281 transitions. [2022-11-26 01:05:49,869 INFO L78 Accepts]: Start accepts. Automaton has 20042 states and 32281 transitions. Word has length 139 [2022-11-26 01:05:49,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:49,869 INFO L495 AbstractCegarLoop]: Abstraction has 20042 states and 32281 transitions. [2022-11-26 01:05:49,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2022-11-26 01:05:49,870 INFO L276 IsEmpty]: Start isEmpty. Operand 20042 states and 32281 transitions. [2022-11-26 01:05:49,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-26 01:05:49,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:49,893 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:49,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:50,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 01:05:50,104 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:50,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:50,104 INFO L85 PathProgramCache]: Analyzing trace with hash 613446673, now seen corresponding path program 1 times [2022-11-26 01:05:50,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:50,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357799892] [2022-11-26 01:05:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:50,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-26 01:05:50,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:50,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357799892] [2022-11-26 01:05:50,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357799892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:50,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258157329] [2022-11-26 01:05:50,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:50,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:50,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:50,915 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:50,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 01:05:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:51,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 2001 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:05:51,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 01:05:51,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:05:51,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258157329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:05:51,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:05:51,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2022-11-26 01:05:51,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087141729] [2022-11-26 01:05:51,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:51,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:05:51,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:51,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:05:51,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-26 01:05:51,413 INFO L87 Difference]: Start difference. First operand 20042 states and 32281 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-26 01:05:53,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:53,877 INFO L93 Difference]: Finished difference Result 45870 states and 76443 transitions. [2022-11-26 01:05:53,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:05:53,878 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), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 146 [2022-11-26 01:05:53,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:54,056 INFO L225 Difference]: With dead ends: 45870 [2022-11-26 01:05:54,056 INFO L226 Difference]: Without dead ends: 25840 [2022-11-26 01:05:54,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-26 01:05:54,166 INFO L413 NwaCegarLoop]: 777 mSDtfsCounter, 485 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:54,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 1342 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:05:54,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25840 states. [2022-11-26 01:05:55,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25840 to 25498. [2022-11-26 01:05:55,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25498 states, 19716 states have (on average 1.4389835666463786) internal successors, (28371), 20318 states have internal predecessors, (28371), 3899 states have call successors, (3899), 1347 states have call predecessors, (3899), 1882 states have return successors, (8998), 4072 states have call predecessors, (8998), 3881 states have call successors, (8998) [2022-11-26 01:05:56,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25498 states to 25498 states and 41268 transitions. [2022-11-26 01:05:56,088 INFO L78 Accepts]: Start accepts. Automaton has 25498 states and 41268 transitions. Word has length 146 [2022-11-26 01:05:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:56,089 INFO L495 AbstractCegarLoop]: Abstraction has 25498 states and 41268 transitions. [2022-11-26 01:05:56,089 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), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-26 01:05:56,089 INFO L276 IsEmpty]: Start isEmpty. Operand 25498 states and 41268 transitions. [2022-11-26 01:05:56,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-26 01:05:56,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:56,112 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:56,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:56,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:56,321 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:56,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1901433770, now seen corresponding path program 1 times [2022-11-26 01:05:56,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:56,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546210636] [2022-11-26 01:05:56,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:56,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:56,906 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-26 01:05:56,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:56,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546210636] [2022-11-26 01:05:56,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546210636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:56,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830605537] [2022-11-26 01:05:56,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:56,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:56,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:56,908 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:56,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-26 01:05:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:57,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 1807 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 01:05:57,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 01:05:57,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:05:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 01:05:58,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830605537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:05:58,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1429969951] [2022-11-26 01:05:58,144 INFO L159 IcfgInterpreter]: Started Sifa with 132 locations of interest [2022-11-26 01:05:58,144 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:05:58,148 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:05:58,154 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:05:58,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:06:03,726 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-11-26 01:06:11,304 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 499 for LOIs [2022-11-26 01:06:11,629 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-11-26 01:06:14,023 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-11-26 01:06:14,219 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 437 for LOIs [2022-11-26 01:06:14,289 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-11-26 01:06:14,358 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-11-26 01:06:17,889 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-26 01:06:18,543 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-26 01:06:18,683 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:06:52,376 WARN L233 SmtUtils]: Spent 7.14s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:06:59,941 WARN L233 SmtUtils]: Spent 7.23s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:07:08,842 WARN L233 SmtUtils]: Spent 5.42s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:07:30,409 WARN L233 SmtUtils]: Spent 6.45s on a formula simplification. DAG size of input: 610 DAG size of output: 585 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:07:37,611 WARN L233 SmtUtils]: Spent 6.72s on a formula simplification. DAG size of input: 610 DAG size of output: 587 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:07:46,368 WARN L233 SmtUtils]: Spent 6.31s on a formula simplification. DAG size of input: 618 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:07:54,009 WARN L233 SmtUtils]: Spent 7.07s on a formula simplification. DAG size of input: 618 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:08:05,063 WARN L233 SmtUtils]: Spent 10.43s on a formula simplification. DAG size of input: 499 DAG size of output: 442 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:08:17,805 WARN L233 SmtUtils]: Spent 12.07s on a formula simplification. DAG size of input: 535 DAG size of output: 450 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:08:25,846 WARN L233 SmtUtils]: Spent 7.40s on a formula simplification. DAG size of input: 622 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:08:33,970 WARN L233 SmtUtils]: Spent 7.45s on a formula simplification. DAG size of input: 622 DAG size of output: 593 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:08:42,960 WARN L233 SmtUtils]: Spent 7.00s on a formula simplification. DAG size of input: 625 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:08:50,674 WARN L233 SmtUtils]: Spent 7.05s on a formula simplification. DAG size of input: 625 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:08:50,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1429969951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:08:50,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:08:50,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 6, 7] total 44 [2022-11-26 01:08:50,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142740028] [2022-11-26 01:08:50,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:08:50,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-26 01:08:50,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:08:50,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-26 01:08:50,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1684, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 01:08:50,690 INFO L87 Difference]: Start difference. First operand 25498 states and 41268 transitions. Second operand has 29 states, 21 states have (on average 4.380952380952381) internal successors, (92), 17 states have internal predecessors, (92), 11 states have call successors, (27), 8 states have call predecessors, (27), 9 states have return successors, (25), 10 states have call predecessors, (25), 10 states have call successors, (25) [2022-11-26 01:08:58,561 WARN L233 SmtUtils]: Spent 6.78s on a formula simplification. DAG size of input: 610 DAG size of output: 575 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:09:05,590 WARN L233 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 616 DAG size of output: 581 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:09:13,064 WARN L233 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 594 DAG size of output: 576 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:09:19,511 WARN L233 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 594 DAG size of output: 576 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:09:32,707 WARN L233 SmtUtils]: Spent 12.36s on a formula simplification. DAG size of input: 596 DAG size of output: 578 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:09:45,711 WARN L233 SmtUtils]: Spent 12.60s on a formula simplification. DAG size of input: 602 DAG size of output: 584 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:10:20,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:20,670 INFO L93 Difference]: Finished difference Result 51117 states and 82715 transitions. [2022-11-26 01:10:20,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-26 01:10:20,671 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 4.380952380952381) internal successors, (92), 17 states have internal predecessors, (92), 11 states have call successors, (27), 8 states have call predecessors, (27), 9 states have return successors, (25), 10 states have call predecessors, (25), 10 states have call successors, (25) Word has length 157 [2022-11-26 01:10:20,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:20,896 INFO L225 Difference]: With dead ends: 51117 [2022-11-26 01:10:20,896 INFO L226 Difference]: Without dead ends: 25631 [2022-11-26 01:10:21,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 431 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 204.1s TimeCoverageRelationStatistics Valid=256, Invalid=2194, Unknown=0, NotChecked=0, Total=2450 [2022-11-26 01:10:21,117 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 211 mSDsluCounter, 3782 mSDsCounter, 0 mSdLazyCounter, 5340 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 4397 SdHoareTripleChecker+Invalid, 5397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 5340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:21,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 4397 Invalid, 5397 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [57 Valid, 5340 Invalid, 0 Unknown, 0 Unchecked, 35.7s Time] [2022-11-26 01:10:21,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25631 states. [2022-11-26 01:10:23,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25631 to 25552. [2022-11-26 01:10:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25552 states, 19756 states have (on average 1.4383478436930552) internal successors, (28416), 20357 states have internal predecessors, (28416), 3908 states have call successors, (3908), 1353 states have call predecessors, (3908), 1887 states have return successors, (9007), 4081 states have call predecessors, (9007), 3890 states have call successors, (9007) [2022-11-26 01:10:23,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25552 states to 25552 states and 41331 transitions. [2022-11-26 01:10:23,595 INFO L78 Accepts]: Start accepts. Automaton has 25552 states and 41331 transitions. Word has length 157 [2022-11-26 01:10:23,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:23,596 INFO L495 AbstractCegarLoop]: Abstraction has 25552 states and 41331 transitions. [2022-11-26 01:10:23,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 4.380952380952381) internal successors, (92), 17 states have internal predecessors, (92), 11 states have call successors, (27), 8 states have call predecessors, (27), 9 states have return successors, (25), 10 states have call predecessors, (25), 10 states have call successors, (25) [2022-11-26 01:10:23,596 INFO L276 IsEmpty]: Start isEmpty. Operand 25552 states and 41331 transitions. [2022-11-26 01:10:23,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-11-26 01:10:23,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:23,608 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 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, 1] [2022-11-26 01:10:23,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:23,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:23,809 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:23,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:23,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1741788275, now seen corresponding path program 1 times [2022-11-26 01:10:23,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:23,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492017787] [2022-11-26 01:10:23,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:23,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-26 01:10:24,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:24,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492017787] [2022-11-26 01:10:24,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492017787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:24,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:10:24,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 01:10:24,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479381509] [2022-11-26 01:10:24,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:24,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:10:24,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:24,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:10:24,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:10:24,455 INFO L87 Difference]: Start difference. First operand 25552 states and 41331 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (27), 3 states have call predecessors, (27), 4 states have return successors, (25), 5 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-26 01:10:28,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:28,363 INFO L93 Difference]: Finished difference Result 51838 states and 85529 transitions. [2022-11-26 01:10:28,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 01:10:28,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (27), 3 states have call predecessors, (27), 4 states have return successors, (25), 5 states have call predecessors, (25), 3 states have call successors, (25) Word has length 201 [2022-11-26 01:10:28,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:28,538 INFO L225 Difference]: With dead ends: 51838 [2022-11-26 01:10:28,538 INFO L226 Difference]: Without dead ends: 28624 [2022-11-26 01:10:28,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:10:28,651 INFO L413 NwaCegarLoop]: 756 mSDtfsCounter, 737 mSDsluCounter, 3437 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 4193 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:28,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 4193 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 01:10:28,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28624 states. [2022-11-26 01:10:31,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28624 to 27112. [2022-11-26 01:10:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27112 states, 21058 states have (on average 1.4418273340298224) internal successors, (30362), 21841 states have internal predecessors, (30362), 3960 states have call successors, (3960), 1353 states have call predecessors, (3960), 2093 states have return successors, (9909), 4157 states have call predecessors, (9909), 3942 states have call successors, (9909) [2022-11-26 01:10:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27112 states to 27112 states and 44231 transitions. [2022-11-26 01:10:31,276 INFO L78 Accepts]: Start accepts. Automaton has 27112 states and 44231 transitions. Word has length 201 [2022-11-26 01:10:31,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:31,277 INFO L495 AbstractCegarLoop]: Abstraction has 27112 states and 44231 transitions. [2022-11-26 01:10:31,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (27), 3 states have call predecessors, (27), 4 states have return successors, (25), 5 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-26 01:10:31,277 INFO L276 IsEmpty]: Start isEmpty. Operand 27112 states and 44231 transitions. [2022-11-26 01:10:31,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-26 01:10:31,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:31,290 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 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] [2022-11-26 01:10:31,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-26 01:10:31,290 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:31,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:31,291 INFO L85 PathProgramCache]: Analyzing trace with hash 2144776654, now seen corresponding path program 1 times [2022-11-26 01:10:31,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:31,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235014881] [2022-11-26 01:10:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:31,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-26 01:10:31,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:31,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235014881] [2022-11-26 01:10:31,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235014881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:31,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:10:31,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:10:31,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178919210] [2022-11-26 01:10:31,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:31,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:10:31,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:31,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:10:31,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:10:31,533 INFO L87 Difference]: Start difference. First operand 27112 states and 44231 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-26 01:10:36,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:36,879 INFO L93 Difference]: Finished difference Result 70973 states and 118792 transitions. [2022-11-26 01:10:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:10:36,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 179 [2022-11-26 01:10:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:37,179 INFO L225 Difference]: With dead ends: 70973 [2022-11-26 01:10:37,179 INFO L226 Difference]: Without dead ends: 43791 [2022-11-26 01:10:37,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:10:37,362 INFO L413 NwaCegarLoop]: 1271 mSDtfsCounter, 1133 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 2677 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:37,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 2677 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 01:10:37,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43791 states. [2022-11-26 01:10:41,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43791 to 41337. [2022-11-26 01:10:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41337 states, 32101 states have (on average 1.4457493536026915) internal successors, (46410), 33266 states have internal predecessors, (46410), 6083 states have call successors, (6083), 2106 states have call predecessors, (6083), 3152 states have return successors, (15552), 6322 states have call predecessors, (15552), 6057 states have call successors, (15552) [2022-11-26 01:10:41,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41337 states to 41337 states and 68045 transitions. [2022-11-26 01:10:41,420 INFO L78 Accepts]: Start accepts. Automaton has 41337 states and 68045 transitions. Word has length 179 [2022-11-26 01:10:41,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:41,420 INFO L495 AbstractCegarLoop]: Abstraction has 41337 states and 68045 transitions. [2022-11-26 01:10:41,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-26 01:10:41,421 INFO L276 IsEmpty]: Start isEmpty. Operand 41337 states and 68045 transitions. [2022-11-26 01:10:41,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-26 01:10:41,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:41,428 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 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, 1] [2022-11-26 01:10:41,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-26 01:10:41,429 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:41,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:41,430 INFO L85 PathProgramCache]: Analyzing trace with hash -54608710, now seen corresponding path program 1 times [2022-11-26 01:10:41,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:41,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416467243] [2022-11-26 01:10:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:41,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:42,219 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-26 01:10:42,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:42,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416467243] [2022-11-26 01:10:42,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416467243] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:42,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476951846] [2022-11-26 01:10:42,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:42,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:42,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:42,223 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:42,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-26 01:10:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:42,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 1821 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 01:10:42,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 01:10:42,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:10:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-26 01:10:43,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476951846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:10:43,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [154366908] [2022-11-26 01:10:43,656 INFO L159 IcfgInterpreter]: Started Sifa with 130 locations of interest [2022-11-26 01:10:43,656 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:10:43,657 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:10:43,657 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:10:43,657 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:10:48,581 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-11-26 01:10:58,213 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 60 for LOIs [2022-11-26 01:10:58,231 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-11-26 01:11:00,601 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-11-26 01:11:00,839 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 437 for LOIs [2022-11-26 01:11:00,920 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-11-26 01:11:01,006 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-11-26 01:11:04,793 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-26 01:11:05,375 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-26 01:11:05,512 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:11:10,752 WARN L233 SmtUtils]: Spent 5.04s on a formula simplification. DAG size of input: 514 DAG size of output: 509 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:11:28,458 WARN L233 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 513 DAG size of output: 510 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:11:36,547 WARN L233 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 545 DAG size of output: 512 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:11:45,200 WARN L233 SmtUtils]: Spent 8.22s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:11:53,942 WARN L233 SmtUtils]: Spent 8.31s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:12:04,633 WARN L233 SmtUtils]: Spent 6.38s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:12:26,946 WARN L233 SmtUtils]: Spent 6.81s on a formula simplification. DAG size of input: 610 DAG size of output: 585 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:12:33,650 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 610 DAG size of output: 587 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:12:42,623 WARN L233 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 618 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:12:49,501 WARN L233 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 616 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:12:58,502 WARN L233 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 622 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:13:05,493 WARN L233 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 622 DAG size of output: 593 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:13:14,000 WARN L233 SmtUtils]: Spent 6.45s on a formula simplification. DAG size of input: 625 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:13:21,032 WARN L233 SmtUtils]: Spent 6.34s on a formula simplification. DAG size of input: 625 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:13:29,760 WARN L233 SmtUtils]: Spent 6.50s on a formula simplification. DAG size of input: 628 DAG size of output: 596 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:13:37,164 WARN L233 SmtUtils]: Spent 6.69s on a formula simplification. DAG size of input: 626 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:13:37,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [154366908] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:13:37,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:13:37,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [10, 6, 7] total 47 [2022-11-26 01:13:37,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86984530] [2022-11-26 01:13:37,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:13:37,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-26 01:13:37,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:13:37,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-26 01:13:37,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1951, Unknown=0, NotChecked=0, Total=2162 [2022-11-26 01:13:37,176 INFO L87 Difference]: Start difference. First operand 41337 states and 68045 transitions. Second operand has 31 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 18 states have internal predecessors, (90), 12 states have call successors, (26), 8 states have call predecessors, (26), 9 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2022-11-26 01:13:44,662 WARN L233 SmtUtils]: Spent 6.51s on a formula simplification. DAG size of input: 610 DAG size of output: 575 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:13:51,721 WARN L233 SmtUtils]: Spent 6.67s on a formula simplification. DAG size of input: 616 DAG size of output: 581 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:13:58,481 WARN L233 SmtUtils]: Spent 5.58s on a formula simplification. DAG size of input: 594 DAG size of output: 576 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:14:04,744 WARN L233 SmtUtils]: Spent 5.71s on a formula simplification. DAG size of input: 594 DAG size of output: 576 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:14:10,997 WARN L233 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 594 DAG size of output: 575 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:14:17,216 WARN L233 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 600 DAG size of output: 581 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:14:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:14:53,207 INFO L93 Difference]: Finished difference Result 82665 states and 136110 transitions. [2022-11-26 01:14:53,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-26 01:14:53,208 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 18 states have internal predecessors, (90), 12 states have call successors, (26), 8 states have call predecessors, (26), 9 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) Word has length 165 [2022-11-26 01:14:53,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:14:53,711 INFO L225 Difference]: With dead ends: 82665 [2022-11-26 01:14:53,711 INFO L226 Difference]: Without dead ends: 41406 [2022-11-26 01:14:53,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 448 SyntacticMatches, 11 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 189.2s TimeCoverageRelationStatistics Valid=257, Invalid=2499, Unknown=0, NotChecked=0, Total=2756 [2022-11-26 01:14:53,891 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 196 mSDsluCounter, 3421 mSDsCounter, 0 mSdLazyCounter, 5513 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 4033 SdHoareTripleChecker+Invalid, 5559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 5513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:14:53,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 4033 Invalid, 5559 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [46 Valid, 5513 Invalid, 0 Unknown, 0 Unchecked, 35.2s Time] [2022-11-26 01:14:53,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41406 states. [2022-11-26 01:14:57,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41406 to 41339. [2022-11-26 01:14:57,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41339 states, 32102 states have (on average 1.4457043174880069) internal successors, (46410), 33267 states have internal predecessors, (46410), 6083 states have call successors, (6083), 2107 states have call predecessors, (6083), 3153 states have return successors, (15552), 6322 states have call predecessors, (15552), 6057 states have call successors, (15552) [2022-11-26 01:14:57,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41339 states to 41339 states and 68045 transitions. [2022-11-26 01:14:57,618 INFO L78 Accepts]: Start accepts. Automaton has 41339 states and 68045 transitions. Word has length 165 [2022-11-26 01:14:57,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:14:57,619 INFO L495 AbstractCegarLoop]: Abstraction has 41339 states and 68045 transitions. [2022-11-26 01:14:57,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 18 states have internal predecessors, (90), 12 states have call successors, (26), 8 states have call predecessors, (26), 9 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2022-11-26 01:14:57,619 INFO L276 IsEmpty]: Start isEmpty. Operand 41339 states and 68045 transitions. [2022-11-26 01:14:57,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-26 01:14:57,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:14:57,628 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:14:57,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-26 01:14:57,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:14:57,829 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:14:57,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:14:57,829 INFO L85 PathProgramCache]: Analyzing trace with hash -578980980, now seen corresponding path program 1 times [2022-11-26 01:14:57,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:14:57,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063874943] [2022-11-26 01:14:57,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:57,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:14:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-26 01:14:59,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:14:59,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063874943] [2022-11-26 01:14:59,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063874943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:14:59,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979599868] [2022-11-26 01:14:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:59,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:14:59,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:14:59,167 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:14:59,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7928f857-6825-48da-b159-4372e3cc43ef/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-26 01:14:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:59,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 2032 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 01:14:59,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 65 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 01:14:59,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:15:00,052 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-26 01:15:00,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979599868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:15:00,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [146341513] [2022-11-26 01:15:00,056 INFO L159 IcfgInterpreter]: Started Sifa with 101 locations of interest [2022-11-26 01:15:00,057 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:15:00,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:15:00,057 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:15:00,058 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:15:08,896 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 61 for LOIs [2022-11-26 01:15:12,911 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 36 for LOIs [2022-11-26 01:15:12,916 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 46 for LOIs [2022-11-26 01:15:13,308 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 68 for LOIs [2022-11-26 01:15:13,328 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-11-26 01:15:15,560 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-11-26 01:15:15,776 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 61 for LOIs [2022-11-26 01:15:15,915 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 58 for LOIs [2022-11-26 01:15:15,927 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 70 for LOIs [2022-11-26 01:15:15,939 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 45 for LOIs [2022-11-26 01:15:15,952 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 48 for LOIs [2022-11-26 01:15:15,957 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-11-26 01:15:19,459 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-26 01:15:20,070 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-26 01:15:20,235 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:15:55,000 WARN L233 SmtUtils]: Spent 7.20s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:16:02,653 WARN L233 SmtUtils]: Spent 7.21s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:16:11,758 WARN L233 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:16:54,366 WARN L233 SmtUtils]: Spent 8.79s on a formula simplification. DAG size of input: 454 DAG size of output: 435 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:17:00,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1210503#(and (= ~currentHeading~0 0) (= ~head~0.offset 0) (<= ~floorButtons_0~0 2147483647) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ ~floorButtons_0~0 2147483648)) (not (= ~doorState~0 1)) (not (= (+ ~currentFloorID~0 1) 0)) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-11-26 01:17:00,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:17:00,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:17:00,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 7] total 26 [2022-11-26 01:17:00,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839345760] [2022-11-26 01:17:00,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:17:00,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 01:17:00,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:17:00,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 01:17:00,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=11327, Unknown=0, NotChecked=0, Total=12210 [2022-11-26 01:17:00,339 INFO L87 Difference]: Start difference. First operand 41339 states and 68045 transitions. Second operand has 26 states, 18 states have (on average 9.11111111111111) internal successors, (164), 22 states have internal predecessors, (164), 13 states have call successors, (58), 5 states have call predecessors, (58), 14 states have return successors, (60), 16 states have call predecessors, (60), 13 states have call successors, (60) [2022-11-26 01:17:22,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:17:22,450 INFO L93 Difference]: Finished difference Result 105092 states and 194031 transitions. [2022-11-26 01:17:22,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-26 01:17:22,451 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 18 states have (on average 9.11111111111111) internal successors, (164), 22 states have internal predecessors, (164), 13 states have call successors, (58), 5 states have call predecessors, (58), 14 states have return successors, (60), 16 states have call predecessors, (60), 13 states have call successors, (60) Word has length 158 [2022-11-26 01:17:22,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:17:22,952 INFO L225 Difference]: With dead ends: 105092 [2022-11-26 01:17:22,952 INFO L226 Difference]: Without dead ends: 67010 [2022-11-26 01:17:23,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 398 SyntacticMatches, 10 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10807 ImplicationChecksByTransitivity, 102.8s TimeCoverageRelationStatistics Valid=1916, Invalid=25474, Unknown=0, NotChecked=0, Total=27390 [2022-11-26 01:17:23,637 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 6716 mSDsluCounter, 5441 mSDsCounter, 0 mSdLazyCounter, 18678 mSolverCounterSat, 4294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6716 SdHoareTripleChecker+Valid, 6037 SdHoareTripleChecker+Invalid, 22972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4294 IncrementalHoareTripleChecker+Valid, 18678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:17:23,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6716 Valid, 6037 Invalid, 22972 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4294 Valid, 18678 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2022-11-26 01:17:23,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67010 states. [2022-11-26 01:17:29,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67010 to 63014. [2022-11-26 01:17:29,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63014 states, 45507 states have (on average 1.3898081613817654) internal successors, (63246), 47837 states have internal predecessors, (63246), 12026 states have call successors, (12026), 4271 states have call predecessors, (12026), 5480 states have return successors, (28075), 11791 states have call predecessors, (28075), 11985 states have call successors, (28075)