./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P --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 bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:44:55,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:44:55,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:44:55,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:44:55,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:44:55,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:44:55,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:44:55,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:44:55,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:44:55,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:44:55,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:44:55,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:44:55,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:44:55,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:44:55,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:44:55,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:44:55,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:44:55,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:44:55,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:44:55,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:44:55,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:44:55,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:44:55,948 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:44:55,949 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:44:55,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:44:55,959 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:44:55,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:44:55,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:44:55,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:44:55,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:44:55,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:44:55,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:44:55,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:44:55,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:44:55,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:44:55,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:44:55,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:44:55,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:44:55,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:44:55,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:44:55,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:44:55,976 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:44:56,027 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:44:56,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:44:56,029 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:44:56,029 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:44:56,030 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:44:56,031 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:44:56,031 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:44:56,031 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:44:56,032 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:44:56,032 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:44:56,033 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:44:56,033 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:44:56,033 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:44:56,034 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:44:56,034 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:44:56,034 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:44:56,035 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:44:56,035 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:44:56,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:44:56,036 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:44:56,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:44:56,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:44:56,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:44:56,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:44:56,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:44:56,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:44:56,039 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:44:56,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:44:56,040 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:44:56,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:44:56,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:44:56,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:44:56,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:44:56,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:44:56,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:44:56,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:44:56,042 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:44:56,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:44:56,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:44:56,043 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:44:56,043 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:44:56,044 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece [2021-11-21 01:44:56,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:44:56,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:44:56,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:44:56,426 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:44:56,426 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:44:56,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2021-11-21 01:44:56,516 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/data/b848b06c2/2ead528183ed4c6e8789059596862aa8/FLAGc6add4ff6 [2021-11-21 01:44:57,252 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:44:57,253 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2021-11-21 01:44:57,293 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/data/b848b06c2/2ead528183ed4c6e8789059596862aa8/FLAGc6add4ff6 [2021-11-21 01:44:57,428 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/data/b848b06c2/2ead528183ed4c6e8789059596862aa8 [2021-11-21 01:44:57,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:44:57,433 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:44:57,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:44:57,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:44:57,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:44:57,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:44:57" (1/1) ... [2021-11-21 01:44:57,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c9df61a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:57, skipping insertion in model container [2021-11-21 01:44:57,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:44:57" (1/1) ... [2021-11-21 01:44:57,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:44:57,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:44:58,223 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2021-11-21 01:44:58,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:44:58,316 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:44:58,436 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2021-11-21 01:44:58,457 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:44:58,485 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:44:58,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:58 WrapperNode [2021-11-21 01:44:58,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:44:58,487 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:44:58,487 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:44:58,488 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:44:58,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:58" (1/1) ... [2021-11-21 01:44:58,528 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:58" (1/1) ... [2021-11-21 01:44:58,594 INFO L137 Inliner]: procedures = 90, calls = 338, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 818 [2021-11-21 01:44:58,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:44:58,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:44:58,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:44:58,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:44:58,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:58" (1/1) ... [2021-11-21 01:44:58,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:58" (1/1) ... [2021-11-21 01:44:58,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:58" (1/1) ... [2021-11-21 01:44:58,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:58" (1/1) ... [2021-11-21 01:44:58,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:58" (1/1) ... [2021-11-21 01:44:58,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:58" (1/1) ... [2021-11-21 01:44:58,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:58" (1/1) ... [2021-11-21 01:44:58,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:44:58,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:44:58,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:44:58,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:44:58,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:58" (1/1) ... [2021-11-21 01:44:58,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:44:58,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:44:58,772 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:44:58,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:44:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-21 01:44:58,868 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-21 01:44:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:44:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-21 01:44:58,868 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-21 01:44:58,869 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-21 01:44:58,869 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-21 01:44:58,869 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2021-11-21 01:44:58,869 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2021-11-21 01:44:58,869 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-21 01:44:58,870 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-21 01:44:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-21 01:44:58,870 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-21 01:44:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-21 01:44:58,870 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-21 01:44:58,871 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-21 01:44:58,871 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-21 01:44:58,871 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-21 01:44:58,871 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-21 01:44:58,885 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-21 01:44:58,885 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-21 01:44:58,885 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-21 01:44:58,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-21 01:44:58,885 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-21 01:44:58,886 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-21 01:44:58,886 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-21 01:44:58,886 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-21 01:44:58,887 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-21 01:44:58,887 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-21 01:44:58,887 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-21 01:44:58,887 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-21 01:44:58,888 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-21 01:44:58,888 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-21 01:44:58,888 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-21 01:44:58,888 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-21 01:44:58,888 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-21 01:44:58,888 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-21 01:44:58,889 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-21 01:44:58,889 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-21 01:44:58,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:44:58,889 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-21 01:44:58,889 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-21 01:44:58,889 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-21 01:44:58,890 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-21 01:44:58,890 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-21 01:44:58,890 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-21 01:44:58,891 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-21 01:44:58,892 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-21 01:44:58,892 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-21 01:44:58,893 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-21 01:44:58,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:44:58,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:44:58,896 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-21 01:44:58,896 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-21 01:44:59,160 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:44:59,163 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:45:00,588 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:45:01,289 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:45:01,290 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-21 01:45:01,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:45:01 BoogieIcfgContainer [2021-11-21 01:45:01,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:45:01,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:45:01,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:45:01,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:45:01,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:44:57" (1/3) ... [2021-11-21 01:45:01,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77478ec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:45:01, skipping insertion in model container [2021-11-21 01:45:01,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:58" (2/3) ... [2021-11-21 01:45:01,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77478ec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:45:01, skipping insertion in model container [2021-11-21 01:45:01,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:45:01" (3/3) ... [2021-11-21 01:45:01,307 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product21.cil.c [2021-11-21 01:45:01,318 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:45:01,318 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:45:01,399 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:45:01,410 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:45:01,410 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:45:01,464 INFO L276 IsEmpty]: Start isEmpty. Operand has 409 states, 282 states have (on average 1.599290780141844) internal successors, (451), 300 states have internal predecessors, (451), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-21 01:45:01,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-21 01:45:01,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:01,507 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:01,508 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:01,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:01,515 INFO L85 PathProgramCache]: Analyzing trace with hash 5537700, now seen corresponding path program 1 times [2021-11-21 01:45:01,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:01,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626473748] [2021-11-21 01:45:01,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:01,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:45:02,219 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:02,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626473748] [2021-11-21 01:45:02,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626473748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:02,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:02,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:45:02,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698697117] [2021-11-21 01:45:02,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:02,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:45:02,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:02,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:45:02,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:45:02,295 INFO L87 Difference]: Start difference. First operand has 409 states, 282 states have (on average 1.599290780141844) internal successors, (451), 300 states have internal predecessors, (451), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-21 01:45:03,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:03,252 INFO L93 Difference]: Finished difference Result 1204 states and 1950 transitions. [2021-11-21 01:45:03,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:45:03,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2021-11-21 01:45:03,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:03,303 INFO L225 Difference]: With dead ends: 1204 [2021-11-21 01:45:03,303 INFO L226 Difference]: Without dead ends: 800 [2021-11-21 01:45:03,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:45:03,327 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 1011 mSDsluCounter, 3841 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 4458 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:03,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1026 Valid, 4458 Invalid, 444 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [61 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:45:03,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-11-21 01:45:03,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 784. [2021-11-21 01:45:03,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 549 states have (on average 1.5810564663023678) internal successors, (868), 576 states have internal predecessors, (868), 188 states have call successors, (188), 47 states have call predecessors, (188), 46 states have return successors, (193), 185 states have call predecessors, (193), 184 states have call successors, (193) [2021-11-21 01:45:03,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1249 transitions. [2021-11-21 01:45:03,548 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1249 transitions. Word has length 82 [2021-11-21 01:45:03,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:03,549 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 1249 transitions. [2021-11-21 01:45:03,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-21 01:45:03,556 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1249 transitions. [2021-11-21 01:45:03,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 01:45:03,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:03,569 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:03,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:45:03,570 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:03,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:03,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1875561754, now seen corresponding path program 1 times [2021-11-21 01:45:03,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:03,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583468284] [2021-11-21 01:45:03,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:03,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:45:03,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:03,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583468284] [2021-11-21 01:45:03,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583468284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:03,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:03,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:45:03,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387966755] [2021-11-21 01:45:03,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:03,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:45:03,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:03,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:45:03,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:45:03,917 INFO L87 Difference]: Start difference. First operand 784 states and 1249 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 01:45:04,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:04,199 INFO L93 Difference]: Finished difference Result 1219 states and 1953 transitions. [2021-11-21 01:45:04,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:45:04,199 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 87 [2021-11-21 01:45:04,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:04,211 INFO L225 Difference]: With dead ends: 1219 [2021-11-21 01:45:04,212 INFO L226 Difference]: Without dead ends: 829 [2021-11-21 01:45:04,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:45:04,228 INFO L933 BasicCegarLoop]: 645 mSDtfsCounter, 31 mSDsluCounter, 3337 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3800 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:04,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 3800 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:45:04,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-11-21 01:45:04,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 798. [2021-11-21 01:45:04,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 559 states have (on average 1.5706618962432917) internal successors, (878), 586 states have internal predecessors, (878), 188 states have call successors, (188), 47 states have call predecessors, (188), 50 states have return successors, (203), 189 states have call predecessors, (203), 184 states have call successors, (203) [2021-11-21 01:45:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1269 transitions. [2021-11-21 01:45:04,323 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1269 transitions. Word has length 87 [2021-11-21 01:45:04,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:04,326 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 1269 transitions. [2021-11-21 01:45:04,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 01:45:04,327 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1269 transitions. [2021-11-21 01:45:04,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 01:45:04,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:04,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:04,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:45:04,334 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:04,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:04,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1201600250, now seen corresponding path program 1 times [2021-11-21 01:45:04,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:04,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926408701] [2021-11-21 01:45:04,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:04,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:45:04,529 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:04,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926408701] [2021-11-21 01:45:04,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926408701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:04,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:04,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:45:04,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741228516] [2021-11-21 01:45:04,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:04,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:45:04,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:04,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:45:04,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:45:04,532 INFO L87 Difference]: Start difference. First operand 798 states and 1269 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 01:45:04,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:04,794 INFO L93 Difference]: Finished difference Result 1236 states and 1975 transitions. [2021-11-21 01:45:04,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:45:04,795 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 87 [2021-11-21 01:45:04,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:04,804 INFO L225 Difference]: With dead ends: 1236 [2021-11-21 01:45:04,804 INFO L226 Difference]: Without dead ends: 839 [2021-11-21 01:45:04,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:45:04,810 INFO L933 BasicCegarLoop]: 645 mSDtfsCounter, 31 mSDsluCounter, 3337 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3800 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:04,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 3800 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:45:04,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-11-21 01:45:04,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 800. [2021-11-21 01:45:04,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 561 states have (on average 1.5686274509803921) internal successors, (880), 586 states have internal predecessors, (880), 188 states have call successors, (188), 47 states have call predecessors, (188), 50 states have return successors, (203), 191 states have call predecessors, (203), 184 states have call successors, (203) [2021-11-21 01:45:04,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1271 transitions. [2021-11-21 01:45:04,864 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1271 transitions. Word has length 87 [2021-11-21 01:45:04,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:04,865 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1271 transitions. [2021-11-21 01:45:04,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 01:45:04,866 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1271 transitions. [2021-11-21 01:45:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-21 01:45:04,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:04,870 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:04,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:45:04,871 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:04,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:04,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1759243421, now seen corresponding path program 1 times [2021-11-21 01:45:04,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:04,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717967268] [2021-11-21 01:45:04,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:04,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:45:05,049 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:05,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717967268] [2021-11-21 01:45:05,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717967268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:05,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:05,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:45:05,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812078691] [2021-11-21 01:45:05,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:05,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:45:05,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:05,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:45:05,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:45:05,053 INFO L87 Difference]: Start difference. First operand 800 states and 1271 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 01:45:05,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:05,321 INFO L93 Difference]: Finished difference Result 1239 states and 1978 transitions. [2021-11-21 01:45:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:45:05,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 86 [2021-11-21 01:45:05,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:05,332 INFO L225 Difference]: With dead ends: 1239 [2021-11-21 01:45:05,332 INFO L226 Difference]: Without dead ends: 841 [2021-11-21 01:45:05,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:45:05,339 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 32 mSDsluCounter, 3326 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3786 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:05,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 3786 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:45:05,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-11-21 01:45:05,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 802. [2021-11-21 01:45:05,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 563 states have (on average 1.566607460035524) internal successors, (882), 586 states have internal predecessors, (882), 188 states have call successors, (188), 47 states have call predecessors, (188), 50 states have return successors, (203), 193 states have call predecessors, (203), 184 states have call successors, (203) [2021-11-21 01:45:05,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1273 transitions. [2021-11-21 01:45:05,400 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1273 transitions. Word has length 86 [2021-11-21 01:45:05,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:05,401 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 1273 transitions. [2021-11-21 01:45:05,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 01:45:05,401 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1273 transitions. [2021-11-21 01:45:05,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-21 01:45:05,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:05,407 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:05,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:45:05,408 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:05,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:05,408 INFO L85 PathProgramCache]: Analyzing trace with hash 89885006, now seen corresponding path program 1 times [2021-11-21 01:45:05,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:05,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886433595] [2021-11-21 01:45:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:05,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:45:05,566 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:05,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886433595] [2021-11-21 01:45:05,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886433595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:05,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:05,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:45:05,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252478992] [2021-11-21 01:45:05,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:05,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:45:05,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:05,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:45:05,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:45:05,571 INFO L87 Difference]: Start difference. First operand 802 states and 1273 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-21 01:45:06,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:06,657 INFO L93 Difference]: Finished difference Result 1719 states and 2740 transitions. [2021-11-21 01:45:06,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:45:06,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 91 [2021-11-21 01:45:06,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:06,670 INFO L225 Difference]: With dead ends: 1719 [2021-11-21 01:45:06,670 INFO L226 Difference]: Without dead ends: 1199 [2021-11-21 01:45:06,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:45:06,678 INFO L933 BasicCegarLoop]: 1158 mSDtfsCounter, 1148 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 2154 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:06,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1148 Valid, 2154 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:45:06,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-11-21 01:45:06,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1180. [2021-11-21 01:45:06,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 819 states have (on average 1.5189255189255189) internal successors, (1244), 853 states have internal predecessors, (1244), 278 states have call successors, (278), 76 states have call predecessors, (278), 82 states have return successors, (318), 288 states have call predecessors, (318), 273 states have call successors, (318) [2021-11-21 01:45:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1840 transitions. [2021-11-21 01:45:06,767 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1840 transitions. Word has length 91 [2021-11-21 01:45:06,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:06,768 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 1840 transitions. [2021-11-21 01:45:06,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-21 01:45:06,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1840 transitions. [2021-11-21 01:45:06,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-21 01:45:06,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:06,773 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:06,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:45:06,774 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:06,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:06,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1815226451, now seen corresponding path program 1 times [2021-11-21 01:45:06,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:06,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160934117] [2021-11-21 01:45:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:06,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:45:06,919 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:06,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160934117] [2021-11-21 01:45:06,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160934117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:06,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:06,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:45:06,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602473069] [2021-11-21 01:45:06,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:06,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:45:06,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:06,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:45:06,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:45:06,922 INFO L87 Difference]: Start difference. First operand 1180 states and 1840 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-21 01:45:07,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:07,339 INFO L93 Difference]: Finished difference Result 2242 states and 3540 transitions. [2021-11-21 01:45:07,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:45:07,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 93 [2021-11-21 01:45:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:07,354 INFO L225 Difference]: With dead ends: 2242 [2021-11-21 01:45:07,355 INFO L226 Difference]: Without dead ends: 1328 [2021-11-21 01:45:07,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:07,367 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 230 mSDsluCounter, 2422 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 2918 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:07,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 2918 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:45:07,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2021-11-21 01:45:07,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1328. [2021-11-21 01:45:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 954 states have (on average 1.5188679245283019) internal successors, (1449), 993 states have internal predecessors, (1449), 282 states have call successors, (282), 80 states have call predecessors, (282), 91 states have return successors, (322), 292 states have call predecessors, (322), 277 states have call successors, (322) [2021-11-21 01:45:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 2053 transitions. [2021-11-21 01:45:07,468 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 2053 transitions. Word has length 93 [2021-11-21 01:45:07,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:07,468 INFO L470 AbstractCegarLoop]: Abstraction has 1328 states and 2053 transitions. [2021-11-21 01:45:07,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-21 01:45:07,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 2053 transitions. [2021-11-21 01:45:07,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-21 01:45:07,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:07,474 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:07,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:45:07,474 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:07,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:07,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1301135404, now seen corresponding path program 1 times [2021-11-21 01:45:07,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:07,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012805015] [2021-11-21 01:45:07,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:07,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:45:07,666 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:07,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012805015] [2021-11-21 01:45:07,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012805015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:07,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:07,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:45:07,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688627603] [2021-11-21 01:45:07,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:07,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:07,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:07,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:07,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:45:07,669 INFO L87 Difference]: Start difference. First operand 1328 states and 2053 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 01:45:08,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:08,328 INFO L93 Difference]: Finished difference Result 2280 states and 3542 transitions. [2021-11-21 01:45:08,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:45:08,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 95 [2021-11-21 01:45:08,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:08,346 INFO L225 Difference]: With dead ends: 2280 [2021-11-21 01:45:08,347 INFO L226 Difference]: Without dead ends: 1344 [2021-11-21 01:45:08,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:45:08,362 INFO L933 BasicCegarLoop]: 830 mSDtfsCounter, 519 mSDsluCounter, 2162 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 2884 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:08,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 2884 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:45:08,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-11-21 01:45:08,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1333. [2021-11-21 01:45:08,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 957 states have (on average 1.5172413793103448) internal successors, (1452), 997 states have internal predecessors, (1452), 283 states have call successors, (283), 81 states have call predecessors, (283), 92 states have return successors, (325), 292 states have call predecessors, (325), 278 states have call successors, (325) [2021-11-21 01:45:08,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 2060 transitions. [2021-11-21 01:45:08,462 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 2060 transitions. Word has length 95 [2021-11-21 01:45:08,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:08,462 INFO L470 AbstractCegarLoop]: Abstraction has 1333 states and 2060 transitions. [2021-11-21 01:45:08,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 01:45:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 2060 transitions. [2021-11-21 01:45:08,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-21 01:45:08,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:08,467 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:08,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:45:08,468 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:08,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:08,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2045698277, now seen corresponding path program 1 times [2021-11-21 01:45:08,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:08,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386804349] [2021-11-21 01:45:08,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:08,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:08,636 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:45:08,636 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:08,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386804349] [2021-11-21 01:45:08,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386804349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:08,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845544495] [2021-11-21 01:45:08,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:08,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:08,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:08,640 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:08,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:45:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:08,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:45:08,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:45:09,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:45:09,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845544495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:09,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:09,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-21 01:45:09,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055995569] [2021-11-21 01:45:09,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:09,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:45:09,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:09,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:45:09,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:45:09,300 INFO L87 Difference]: Start difference. First operand 1333 states and 2060 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 01:45:09,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:09,583 INFO L93 Difference]: Finished difference Result 2669 states and 4156 transitions. [2021-11-21 01:45:09,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:45:09,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 99 [2021-11-21 01:45:09,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:09,598 INFO L225 Difference]: With dead ends: 2669 [2021-11-21 01:45:09,598 INFO L226 Difference]: Without dead ends: 1351 [2021-11-21 01:45:09,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:45:09,613 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 85 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1689 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:09,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1689 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:45:09,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-11-21 01:45:09,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1351. [2021-11-21 01:45:09,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 972 states have (on average 1.5123456790123457) internal successors, (1470), 1012 states have internal predecessors, (1470), 283 states have call successors, (283), 84 states have call predecessors, (283), 95 states have return successors, (325), 292 states have call predecessors, (325), 278 states have call successors, (325) [2021-11-21 01:45:09,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 2078 transitions. [2021-11-21 01:45:09,714 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 2078 transitions. Word has length 99 [2021-11-21 01:45:09,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:09,716 INFO L470 AbstractCegarLoop]: Abstraction has 1351 states and 2078 transitions. [2021-11-21 01:45:09,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 01:45:09,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 2078 transitions. [2021-11-21 01:45:09,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-21 01:45:09,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:09,727 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:09,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:09,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:09,955 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:09,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:09,956 INFO L85 PathProgramCache]: Analyzing trace with hash 392584210, now seen corresponding path program 1 times [2021-11-21 01:45:09,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:09,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593649480] [2021-11-21 01:45:09,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:09,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:45:10,121 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:10,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593649480] [2021-11-21 01:45:10,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593649480] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:10,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247071362] [2021-11-21 01:45:10,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:10,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:10,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:10,123 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:10,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:45:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:10,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:45:10,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:45:10,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:45:10,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247071362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:10,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:10,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-21 01:45:10,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659400288] [2021-11-21 01:45:10,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:10,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:45:10,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:10,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:45:10,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:45:10,750 INFO L87 Difference]: Start difference. First operand 1351 states and 2078 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 01:45:11,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:11,020 INFO L93 Difference]: Finished difference Result 2696 states and 4171 transitions. [2021-11-21 01:45:11,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:45:11,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 101 [2021-11-21 01:45:11,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:11,034 INFO L225 Difference]: With dead ends: 2696 [2021-11-21 01:45:11,035 INFO L226 Difference]: Without dead ends: 1348 [2021-11-21 01:45:11,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:11,050 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 91 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:11,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1685 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:45:11,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-11-21 01:45:11,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1348. [2021-11-21 01:45:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 969 states have (on average 1.5046439628482973) internal successors, (1458), 1009 states have internal predecessors, (1458), 283 states have call successors, (283), 84 states have call predecessors, (283), 95 states have return successors, (325), 292 states have call predecessors, (325), 278 states have call successors, (325) [2021-11-21 01:45:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 2066 transitions. [2021-11-21 01:45:11,160 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 2066 transitions. Word has length 101 [2021-11-21 01:45:11,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:11,161 INFO L470 AbstractCegarLoop]: Abstraction has 1348 states and 2066 transitions. [2021-11-21 01:45:11,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 01:45:11,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 2066 transitions. [2021-11-21 01:45:11,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-21 01:45:11,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:11,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:11,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:11,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:11,383 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:11,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:11,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1194234044, now seen corresponding path program 1 times [2021-11-21 01:45:11,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:11,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453996901] [2021-11-21 01:45:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:11,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:45:11,522 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:11,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453996901] [2021-11-21 01:45:11,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453996901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:11,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471096819] [2021-11-21 01:45:11,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:11,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:11,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:11,525 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:11,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:45:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:11,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 1385 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:45:11,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:45:12,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:45:12,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471096819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:12,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:12,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-21 01:45:12,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720318296] [2021-11-21 01:45:12,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:12,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:12,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:12,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:12,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:12,168 INFO L87 Difference]: Start difference. First operand 1348 states and 2066 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:45:13,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:13,310 INFO L93 Difference]: Finished difference Result 3456 states and 5434 transitions. [2021-11-21 01:45:13,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:45:13,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2021-11-21 01:45:13,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:13,332 INFO L225 Difference]: With dead ends: 3456 [2021-11-21 01:45:13,332 INFO L226 Difference]: Without dead ends: 2123 [2021-11-21 01:45:13,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:45:13,347 INFO L933 BasicCegarLoop]: 740 mSDtfsCounter, 602 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 2242 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:13,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 2242 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:45:13,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2021-11-21 01:45:13,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2090. [2021-11-21 01:45:13,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 1500 states have (on average 1.4826666666666666) internal successors, (2224), 1565 states have internal predecessors, (2224), 443 states have call successors, (443), 132 states have call predecessors, (443), 146 states have return successors, (557), 454 states have call predecessors, (557), 436 states have call successors, (557) [2021-11-21 01:45:13,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3224 transitions. [2021-11-21 01:45:13,539 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3224 transitions. Word has length 102 [2021-11-21 01:45:13,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:13,540 INFO L470 AbstractCegarLoop]: Abstraction has 2090 states and 3224 transitions. [2021-11-21 01:45:13,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:45:13,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3224 transitions. [2021-11-21 01:45:13,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-21 01:45:13,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:13,545 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:45:13,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:13,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:13,759 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:13,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:13,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1457244725, now seen corresponding path program 1 times [2021-11-21 01:45:13,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:13,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846175118] [2021-11-21 01:45:13,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:13,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:45:13,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:13,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846175118] [2021-11-21 01:45:13,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846175118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:13,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189002841] [2021-11-21 01:45:13,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:13,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:13,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:13,895 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:13,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:45:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:14,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 1388 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:45:14,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 01:45:14,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:45:14,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189002841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:14,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:14,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-21 01:45:14,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061768553] [2021-11-21 01:45:14,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:14,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:14,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:14,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:14,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:14,444 INFO L87 Difference]: Start difference. First operand 2090 states and 3224 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 01:45:14,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:14,733 INFO L93 Difference]: Finished difference Result 4205 states and 6610 transitions. [2021-11-21 01:45:14,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:45:14,733 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 103 [2021-11-21 01:45:14,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:14,757 INFO L225 Difference]: With dead ends: 4205 [2021-11-21 01:45:14,757 INFO L226 Difference]: Without dead ends: 2130 [2021-11-21 01:45:14,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:14,780 INFO L933 BasicCegarLoop]: 606 mSDtfsCounter, 2 mSDsluCounter, 1913 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2409 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:14,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2409 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:45:14,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2021-11-21 01:45:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 2110. [2021-11-21 01:45:14,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2110 states, 1515 states have (on average 1.477887788778878) internal successors, (2239), 1580 states have internal predecessors, (2239), 443 states have call successors, (443), 132 states have call predecessors, (443), 151 states have return successors, (567), 459 states have call predecessors, (567), 436 states have call successors, (567) [2021-11-21 01:45:14,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2110 states to 2110 states and 3249 transitions. [2021-11-21 01:45:14,977 INFO L78 Accepts]: Start accepts. Automaton has 2110 states and 3249 transitions. Word has length 103 [2021-11-21 01:45:14,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:14,978 INFO L470 AbstractCegarLoop]: Abstraction has 2110 states and 3249 transitions. [2021-11-21 01:45:14,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 01:45:14,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2110 states and 3249 transitions. [2021-11-21 01:45:14,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-21 01:45:14,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:14,985 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:15,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:15,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 01:45:15,211 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:15,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:15,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1216711657, now seen corresponding path program 1 times [2021-11-21 01:45:15,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:15,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600982492] [2021-11-21 01:45:15,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:15,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:45:15,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:15,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600982492] [2021-11-21 01:45:15,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600982492] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:15,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739419954] [2021-11-21 01:45:15,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:15,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:15,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:15,342 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:15,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:45:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:15,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:45:15,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:45:15,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:45:15,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739419954] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:15,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:15,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-21 01:45:15,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814572088] [2021-11-21 01:45:15,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:15,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:45:15,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:15,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:45:15,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:45:15,941 INFO L87 Difference]: Start difference. First operand 2110 states and 3249 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:45:16,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:16,877 INFO L93 Difference]: Finished difference Result 4646 states and 7201 transitions. [2021-11-21 01:45:16,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:45:16,878 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 104 [2021-11-21 01:45:16,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:16,904 INFO L225 Difference]: With dead ends: 4646 [2021-11-21 01:45:16,905 INFO L226 Difference]: Without dead ends: 2551 [2021-11-21 01:45:16,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:45:16,926 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 689 mSDsluCounter, 2966 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 3676 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:16,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 3676 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:45:16,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2021-11-21 01:45:17,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2531. [2021-11-21 01:45:17,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 1837 states have (on average 1.4676102340772998) internal successors, (2696), 1903 states have internal predecessors, (2696), 499 states have call successors, (499), 178 states have call predecessors, (499), 194 states have return successors, (743), 511 states have call predecessors, (743), 488 states have call successors, (743) [2021-11-21 01:45:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 3938 transitions. [2021-11-21 01:45:17,151 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 3938 transitions. Word has length 104 [2021-11-21 01:45:17,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:17,152 INFO L470 AbstractCegarLoop]: Abstraction has 2531 states and 3938 transitions. [2021-11-21 01:45:17,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:45:17,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 3938 transitions. [2021-11-21 01:45:17,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-21 01:45:17,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:17,158 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:45:17,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:17,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 01:45:17,359 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:17,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:17,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1507062378, now seen corresponding path program 1 times [2021-11-21 01:45:17,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:17,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383589992] [2021-11-21 01:45:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:17,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:45:17,471 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:17,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383589992] [2021-11-21 01:45:17,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383589992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:17,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785164722] [2021-11-21 01:45:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:17,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:17,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:17,474 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:17,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:45:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:17,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:45:17,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:17,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 01:45:17,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:45:17,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785164722] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:17,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:17,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-21 01:45:17,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910129211] [2021-11-21 01:45:17,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:17,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:45:17,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:17,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:45:17,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:45:17,992 INFO L87 Difference]: Start difference. First operand 2531 states and 3938 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 01:45:18,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:18,396 INFO L93 Difference]: Finished difference Result 5169 states and 8189 transitions. [2021-11-21 01:45:18,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:45:18,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 106 [2021-11-21 01:45:18,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:18,421 INFO L225 Difference]: With dead ends: 5169 [2021-11-21 01:45:18,421 INFO L226 Difference]: Without dead ends: 2662 [2021-11-21 01:45:18,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:45:18,444 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 19 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:18,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 1645 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:45:18,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2021-11-21 01:45:18,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 2632. [2021-11-21 01:45:18,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 1938 states have (on average 1.476264189886481) internal successors, (2861), 2004 states have internal predecessors, (2861), 499 states have call successors, (499), 178 states have call predecessors, (499), 194 states have return successors, (743), 511 states have call predecessors, (743), 488 states have call successors, (743) [2021-11-21 01:45:18,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 4103 transitions. [2021-11-21 01:45:18,723 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 4103 transitions. Word has length 106 [2021-11-21 01:45:18,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:18,724 INFO L470 AbstractCegarLoop]: Abstraction has 2632 states and 4103 transitions. [2021-11-21 01:45:18,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 01:45:18,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 4103 transitions. [2021-11-21 01:45:18,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-21 01:45:18,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:18,733 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:45:18,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:18,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:18,951 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:18,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:18,952 INFO L85 PathProgramCache]: Analyzing trace with hash -2030509337, now seen corresponding path program 1 times [2021-11-21 01:45:18,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:18,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813715489] [2021-11-21 01:45:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:18,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:45:19,076 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:19,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813715489] [2021-11-21 01:45:19,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813715489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:19,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751003713] [2021-11-21 01:45:19,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:19,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:19,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:19,078 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:19,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:45:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:19,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:45:19,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:45:19,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:45:19,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751003713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:19,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:19,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-21 01:45:19,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873835563] [2021-11-21 01:45:19,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:19,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:19,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:19,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:19,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:45:19,701 INFO L87 Difference]: Start difference. First operand 2632 states and 4103 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:45:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:20,945 INFO L93 Difference]: Finished difference Result 6783 states and 11076 transitions. [2021-11-21 01:45:20,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:45:20,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 107 [2021-11-21 01:45:20,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:21,009 INFO L225 Difference]: With dead ends: 6783 [2021-11-21 01:45:21,009 INFO L226 Difference]: Without dead ends: 4593 [2021-11-21 01:45:21,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:21,029 INFO L933 BasicCegarLoop]: 769 mSDtfsCounter, 611 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 2313 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:21,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 2313 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:45:21,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2021-11-21 01:45:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 4423. [2021-11-21 01:45:21,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 3248 states have (on average 1.477832512315271) internal successors, (4800), 3363 states have internal predecessors, (4800), 851 states have call successors, (851), 304 states have call predecessors, (851), 323 states have return successors, (1503), 865 states have call predecessors, (1503), 832 states have call successors, (1503) [2021-11-21 01:45:21,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 7154 transitions. [2021-11-21 01:45:21,364 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 7154 transitions. Word has length 107 [2021-11-21 01:45:21,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:21,364 INFO L470 AbstractCegarLoop]: Abstraction has 4423 states and 7154 transitions. [2021-11-21 01:45:21,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:45:21,365 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 7154 transitions. [2021-11-21 01:45:21,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-21 01:45:21,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:21,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:21,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-21 01:45:21,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 01:45:21,599 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:21,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:21,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1259941590, now seen corresponding path program 1 times [2021-11-21 01:45:21,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:21,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745990977] [2021-11-21 01:45:21,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:21,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:45:21,703 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:21,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745990977] [2021-11-21 01:45:21,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745990977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:21,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985530554] [2021-11-21 01:45:21,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:21,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:21,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:21,705 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:21,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:45:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:22,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:45:22,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:45:22,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:45:22,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985530554] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:22,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:22,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-21 01:45:22,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061306471] [2021-11-21 01:45:22,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:22,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:45:22,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:22,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:45:22,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:45:22,230 INFO L87 Difference]: Start difference. First operand 4423 states and 7154 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 01:45:22,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:22,679 INFO L93 Difference]: Finished difference Result 8942 states and 14868 transitions. [2021-11-21 01:45:22,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:45:22,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 108 [2021-11-21 01:45:22,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:22,719 INFO L225 Difference]: With dead ends: 8942 [2021-11-21 01:45:22,719 INFO L226 Difference]: Without dead ends: 4543 [2021-11-21 01:45:22,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:45:22,768 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 4 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1771 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:22,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1771 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:45:22,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2021-11-21 01:45:23,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 4441. [2021-11-21 01:45:23,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4441 states, 3266 states have (on average 1.4647887323943662) internal successors, (4784), 3381 states have internal predecessors, (4784), 851 states have call successors, (851), 304 states have call predecessors, (851), 323 states have return successors, (1503), 865 states have call predecessors, (1503), 832 states have call successors, (1503) [2021-11-21 01:45:23,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4441 states to 4441 states and 7138 transitions. [2021-11-21 01:45:23,075 INFO L78 Accepts]: Start accepts. Automaton has 4441 states and 7138 transitions. Word has length 108 [2021-11-21 01:45:23,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:23,075 INFO L470 AbstractCegarLoop]: Abstraction has 4441 states and 7138 transitions. [2021-11-21 01:45:23,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 01:45:23,076 INFO L276 IsEmpty]: Start isEmpty. Operand 4441 states and 7138 transitions. [2021-11-21 01:45:23,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-21 01:45:23,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:23,083 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:45:23,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:23,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-21 01:45:23,299 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:23,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:23,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1514843621, now seen corresponding path program 1 times [2021-11-21 01:45:23,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:23,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013114075] [2021-11-21 01:45:23,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:23,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:45:23,498 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:23,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013114075] [2021-11-21 01:45:23,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013114075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:23,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065693976] [2021-11-21 01:45:23,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:23,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:23,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:23,503 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:23,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:45:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:23,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 1396 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:45:23,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:45:24,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:45:24,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065693976] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:24,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:24,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-21 01:45:24,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66069207] [2021-11-21 01:45:24,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:24,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:24,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:24,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:24,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:45:24,159 INFO L87 Difference]: Start difference. First operand 4441 states and 7138 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:45:25,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:25,410 INFO L93 Difference]: Finished difference Result 10384 states and 17336 transitions. [2021-11-21 01:45:25,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:45:25,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 109 [2021-11-21 01:45:25,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:25,472 INFO L225 Difference]: With dead ends: 10384 [2021-11-21 01:45:25,472 INFO L226 Difference]: Without dead ends: 6390 [2021-11-21 01:45:25,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:25,602 INFO L933 BasicCegarLoop]: 773 mSDtfsCounter, 626 mSDsluCounter, 1635 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 2313 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:25,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 2313 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 01:45:25,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6390 states. [2021-11-21 01:45:26,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6390 to 6228. [2021-11-21 01:45:26,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6228 states, 4572 states have (on average 1.466097987751531) internal successors, (6703), 4736 states have internal predecessors, (6703), 1203 states have call successors, (1203), 430 states have call predecessors, (1203), 452 states have return successors, (2447), 1219 states have call predecessors, (2447), 1176 states have call successors, (2447) [2021-11-21 01:45:26,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6228 states to 6228 states and 10353 transitions. [2021-11-21 01:45:26,154 INFO L78 Accepts]: Start accepts. Automaton has 6228 states and 10353 transitions. Word has length 109 [2021-11-21 01:45:26,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:26,155 INFO L470 AbstractCegarLoop]: Abstraction has 6228 states and 10353 transitions. [2021-11-21 01:45:26,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:45:26,155 INFO L276 IsEmpty]: Start isEmpty. Operand 6228 states and 10353 transitions. [2021-11-21 01:45:26,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-21 01:45:26,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:26,163 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:45:26,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:26,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 01:45:26,379 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:26,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:26,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1223131158, now seen corresponding path program 1 times [2021-11-21 01:45:26,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:26,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196369932] [2021-11-21 01:45:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:26,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:26,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:45:26,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:26,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196369932] [2021-11-21 01:45:26,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196369932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:26,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127639694] [2021-11-21 01:45:26,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:26,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:26,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:26,491 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:26,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:45:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:26,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:45:26,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:45:27,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:45:27,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127639694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:27,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:27,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-21 01:45:27,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128084644] [2021-11-21 01:45:27,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:27,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:27,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:27,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:27,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:45:27,022 INFO L87 Difference]: Start difference. First operand 6228 states and 10353 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:45:28,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:28,486 INFO L93 Difference]: Finished difference Result 13719 states and 23412 transitions. [2021-11-21 01:45:28,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:45:28,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 110 [2021-11-21 01:45:28,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:28,563 INFO L225 Difference]: With dead ends: 13719 [2021-11-21 01:45:28,563 INFO L226 Difference]: Without dead ends: 7941 [2021-11-21 01:45:28,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:28,648 INFO L933 BasicCegarLoop]: 773 mSDtfsCounter, 644 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 2305 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:28,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 2305 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:45:28,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7941 states. [2021-11-21 01:45:29,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7941 to 7635. [2021-11-21 01:45:29,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7635 states, 5549 states have (on average 1.467832041809335) internal successors, (8145), 5758 states have internal predecessors, (8145), 1527 states have call successors, (1527), 540 states have call predecessors, (1527), 558 states have return successors, (3293), 1542 states have call predecessors, (3293), 1494 states have call successors, (3293) [2021-11-21 01:45:29,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7635 states to 7635 states and 12965 transitions. [2021-11-21 01:45:29,368 INFO L78 Accepts]: Start accepts. Automaton has 7635 states and 12965 transitions. Word has length 110 [2021-11-21 01:45:29,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:29,368 INFO L470 AbstractCegarLoop]: Abstraction has 7635 states and 12965 transitions. [2021-11-21 01:45:29,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:45:29,369 INFO L276 IsEmpty]: Start isEmpty. Operand 7635 states and 12965 transitions. [2021-11-21 01:45:29,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-21 01:45:29,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:29,377 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:29,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:29,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 01:45:29,591 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:29,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:29,592 INFO L85 PathProgramCache]: Analyzing trace with hash 852826725, now seen corresponding path program 1 times [2021-11-21 01:45:29,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:29,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131741520] [2021-11-21 01:45:29,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:29,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 01:45:29,736 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:29,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131741520] [2021-11-21 01:45:29,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131741520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:29,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750323385] [2021-11-21 01:45:29,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:29,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:29,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:29,739 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:29,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:45:30,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:30,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 1395 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:45:30,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:30,366 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:45:30,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:45:30,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750323385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:30,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [171572959] [2021-11-21 01:45:30,852 INFO L159 IcfgInterpreter]: Started Sifa with 97 locations of interest [2021-11-21 01:45:30,852 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:45:30,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:45:30,864 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:45:30,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:46:42,670 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2021-11-21 01:47:07,644 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2021-11-21 01:47:10,082 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 540 for LOIs [2021-11-21 01:47:46,986 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 787 for LOIs [2021-11-21 01:48:09,472 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 637 for LOIs [2021-11-21 01:48:17,852 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:48:26,105 WARN L227 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 637 DAG size of output: 573 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:48:50,966 WARN L227 SmtUtils]: Spent 16.50s on a formula simplification. DAG size of input: 787 DAG size of output: 654 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:48:57,136 WARN L227 SmtUtils]: Spent 5.46s on a formula simplification that was a NOOP. DAG size: 597 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:49:22,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [171572959] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:22,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:49:22,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [5, 6, 7] total 32 [2021-11-21 01:49:22,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573470261] [2021-11-21 01:49:22,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:22,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 01:49:22,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:22,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 01:49:22,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:49:22,786 INFO L87 Difference]: Start difference. First operand 7635 states and 12965 transitions. Second operand has 20 states, 15 states have (on average 4.6) internal successors, (69), 13 states have internal predecessors, (69), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-21 01:49:40,620 WARN L227 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 597 DAG size of output: 552 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:50:06,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:50:06,798 INFO L93 Difference]: Finished difference Result 15293 states and 25979 transitions. [2021-11-21 01:50:06,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 01:50:06,799 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 4.6) internal successors, (69), 13 states have internal predecessors, (69), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 111 [2021-11-21 01:50:06,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:50:06,848 INFO L225 Difference]: With dead ends: 15293 [2021-11-21 01:50:06,849 INFO L226 Difference]: Without dead ends: 7681 [2021-11-21 01:50:06,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 85.8s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 01:50:06,907 INFO L933 BasicCegarLoop]: 614 mSDtfsCounter, 39 mSDsluCounter, 4740 mSDsCounter, 0 mSdLazyCounter, 5388 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 5259 SdHoareTripleChecker+Invalid, 5405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 5388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:50:06,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 5259 Invalid, 5405 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [17 Valid, 5388 Invalid, 0 Unknown, 0 Unchecked, 22.7s Time] [2021-11-21 01:50:06,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7681 states. [2021-11-21 01:50:07,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7681 to 7655. [2021-11-21 01:50:07,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7655 states, 5565 states have (on average 1.4668463611859839) internal successors, (8163), 5773 states have internal predecessors, (8163), 1529 states have call successors, (1529), 542 states have call predecessors, (1529), 560 states have return successors, (3295), 1545 states have call predecessors, (3295), 1496 states have call successors, (3295) [2021-11-21 01:50:07,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7655 states to 7655 states and 12987 transitions. [2021-11-21 01:50:07,535 INFO L78 Accepts]: Start accepts. Automaton has 7655 states and 12987 transitions. Word has length 111 [2021-11-21 01:50:07,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:50:07,536 INFO L470 AbstractCegarLoop]: Abstraction has 7655 states and 12987 transitions. [2021-11-21 01:50:07,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 4.6) internal successors, (69), 13 states have internal predecessors, (69), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-21 01:50:07,536 INFO L276 IsEmpty]: Start isEmpty. Operand 7655 states and 12987 transitions. [2021-11-21 01:50:07,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-21 01:50:07,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:50:07,544 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:50:07,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:07,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-21 01:50:07,771 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:50:07,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:50:07,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1748637696, now seen corresponding path program 1 times [2021-11-21 01:50:07,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:50:07,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539059824] [2021-11-21 01:50:07,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:07,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:50:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:50:07,878 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:50:07,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539059824] [2021-11-21 01:50:07,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539059824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:50:07,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37270714] [2021-11-21 01:50:07,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:07,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:50:07,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:50:07,880 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:50:07,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 01:50:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:08,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:50:08,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 01:50:08,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:50:08,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37270714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:50:08,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:50:08,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-21 01:50:08,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172543773] [2021-11-21 01:50:08,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:50:08,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:50:08,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:50:08,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:50:08,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:50:08,375 INFO L87 Difference]: Start difference. First operand 7655 states and 12987 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 01:50:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:50:09,103 INFO L93 Difference]: Finished difference Result 16849 states and 30378 transitions. [2021-11-21 01:50:09,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:50:09,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 113 [2021-11-21 01:50:09,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:50:09,168 INFO L225 Difference]: With dead ends: 16849 [2021-11-21 01:50:09,168 INFO L226 Difference]: Without dead ends: 9525 [2021-11-21 01:50:09,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:50:09,254 INFO L933 BasicCegarLoop]: 707 mSDtfsCounter, 252 mSDsluCounter, 1958 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 2560 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:50:09,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 2560 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:50:09,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9525 states. [2021-11-21 01:50:09,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9525 to 8765. [2021-11-21 01:50:09,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8765 states, 6173 states have (on average 1.4629839624169771) internal successors, (9031), 6515 states have internal predecessors, (9031), 2013 states have call successors, (2013), 542 states have call predecessors, (2013), 578 states have return successors, (4080), 2033 states have call predecessors, (4080), 1980 states have call successors, (4080) [2021-11-21 01:50:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8765 states to 8765 states and 15124 transitions. [2021-11-21 01:50:10,045 INFO L78 Accepts]: Start accepts. Automaton has 8765 states and 15124 transitions. Word has length 113 [2021-11-21 01:50:10,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:50:10,046 INFO L470 AbstractCegarLoop]: Abstraction has 8765 states and 15124 transitions. [2021-11-21 01:50:10,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 01:50:10,046 INFO L276 IsEmpty]: Start isEmpty. Operand 8765 states and 15124 transitions. [2021-11-21 01:50:10,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-21 01:50:10,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:50:10,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:50:10,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:10,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:50:10,279 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:50:10,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:50:10,279 INFO L85 PathProgramCache]: Analyzing trace with hash -246584639, now seen corresponding path program 1 times [2021-11-21 01:50:10,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:50:10,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842968959] [2021-11-21 01:50:10,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:10,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:50:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:50:10,374 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:50:10,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842968959] [2021-11-21 01:50:10,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842968959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:50:10,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501777888] [2021-11-21 01:50:10,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:10,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:50:10,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:50:10,376 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:50:10,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2f4cac-cf8b-4e8e-a689-8382559d45b7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 01:50:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:10,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:50:10,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 01:50:10,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:50:11,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501777888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:11,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1080795793] [2021-11-21 01:50:11,334 INFO L159 IcfgInterpreter]: Started Sifa with 101 locations of interest [2021-11-21 01:50:11,335 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:50:11,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:50:11,337 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:50:11,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:51:20,937 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2021-11-21 01:53:47,859 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 454 for LOIs [2021-11-21 01:53:50,448 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 448 for LOIs [2021-11-21 01:53:53,428 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 450 for LOIs [2021-11-21 01:53:56,030 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 456 for LOIs [2021-11-21 01:54:20,577 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 452 for LOIs [2021-11-21 01:54:23,136 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2021-11-21 01:54:26,127 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 540 for LOIs [2021-11-21 01:55:06,704 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 787 for LOIs [2021-11-21 01:55:31,759 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 637 for LOIs [2021-11-21 01:55:39,270 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:55:47,147 WARN L227 SmtUtils]: Spent 5.75s on a formula simplification. DAG size of input: 637 DAG size of output: 573 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:56:11,604 WARN L227 SmtUtils]: Spent 16.10s on a formula simplification. DAG size of input: 787 DAG size of output: 654 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:56:17,851 WARN L227 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 597 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)