./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a80f75-bec3-4103-9fbe-661173139829/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a80f75-bec3-4103-9fbe-661173139829/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a80f75-bec3-4103-9fbe-661173139829/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a80f75-bec3-4103-9fbe-661173139829/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a80f75-bec3-4103-9fbe-661173139829/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a80f75-bec3-4103-9fbe-661173139829/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:07:42,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:07:42,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:07:42,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:07:42,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:07:42,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:07:42,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:07:42,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:07:42,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:07:42,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:07:42,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:07:42,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:07:42,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:07:42,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:07:42,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:07:42,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:07:42,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:07:42,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:07:42,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:07:42,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:07:42,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:07:42,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:07:42,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:07:42,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:07:42,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:07:42,631 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:07:42,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:07:42,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:07:42,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:07:42,635 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:07:42,636 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:07:42,636 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:07:42,638 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:07:42,639 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:07:42,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:07:42,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:07:42,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:07:42,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:07:42,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:07:42,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:07:42,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:07:42,649 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a80f75-bec3-4103-9fbe-661173139829/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:07:42,692 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:07:42,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:07:42,693 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:07:42,693 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:07:42,694 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:07:42,700 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:07:42,700 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:07:42,701 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:07:42,701 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:07:42,701 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:07:42,702 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:07:42,702 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:07:42,702 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:07:42,702 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:07:42,703 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:07:42,703 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:07:42,703 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:07:42,703 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:07:42,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:07:42,704 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:07:42,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:07:42,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:07:42,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:07:42,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:07:42,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:07:42,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:07:42,707 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:07:42,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:07:42,707 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:07:42,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:07:42,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:07:42,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:07:42,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:07:42,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:07:42,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:07:42,709 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:07:42,709 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:07:42,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:07:42,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:07:42,710 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:07:42,710 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:07:42,710 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_87a80f75-bec3-4103-9fbe-661173139829/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a80f75-bec3-4103-9fbe-661173139829/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a [2021-11-25 20:07:42,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:07:42,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:07:42,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:07:42,997 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:07:42,998 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:07:42,999 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a80f75-bec3-4103-9fbe-661173139829/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2021-11-25 20:07:43,080 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a80f75-bec3-4103-9fbe-661173139829/bin/utaipan-eEHZpOm5b7/data/ae229eb08/5195738901614e8da0d4fa4f7a3576d1/FLAG271fc0f06 [2021-11-25 20:07:43,728 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:07:43,730 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a80f75-bec3-4103-9fbe-661173139829/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2021-11-25 20:07:43,770 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a80f75-bec3-4103-9fbe-661173139829/bin/utaipan-eEHZpOm5b7/data/ae229eb08/5195738901614e8da0d4fa4f7a3576d1/FLAG271fc0f06 [2021-11-25 20:07:43,918 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a80f75-bec3-4103-9fbe-661173139829/bin/utaipan-eEHZpOm5b7/data/ae229eb08/5195738901614e8da0d4fa4f7a3576d1 [2021-11-25 20:07:43,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:07:43,922 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:07:43,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:07:43,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:07:43,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:07:43,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:07:43" (1/1) ... [2021-11-25 20:07:43,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4be22ba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:43, skipping insertion in model container [2021-11-25 20:07:43,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:07:43" (1/1) ... [2021-11-25 20:07:43,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:07:44,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:07:44,262 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_87a80f75-bec3-4103-9fbe-661173139829/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c[1545,1558] [2021-11-25 20:07:44,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:07:44,688 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:07:44,705 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_87a80f75-bec3-4103-9fbe-661173139829/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c[1545,1558] [2021-11-25 20:07:44,866 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:07:44,900 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:07:44,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:44 WrapperNode [2021-11-25 20:07:44,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:07:44,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:07:44,902 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:07:44,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:07:44,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:44" (1/1) ... [2021-11-25 20:07:44,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:44" (1/1) ... [2021-11-25 20:07:45,036 INFO L137 Inliner]: procedures = 94, calls = 345, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 876 [2021-11-25 20:07:45,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:07:45,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:07:45,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:07:45,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:07:45,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:44" (1/1) ... [2021-11-25 20:07:45,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:44" (1/1) ... [2021-11-25 20:07:45,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:44" (1/1) ... [2021-11-25 20:07:45,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:44" (1/1) ... [2021-11-25 20:07:45,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:44" (1/1) ... [2021-11-25 20:07:45,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:44" (1/1) ... [2021-11-25 20:07:45,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:44" (1/1) ... [2021-11-25 20:07:45,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:07:45,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:07:45,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:07:45,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:07:45,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:44" (1/1) ... [2021-11-25 20:07:45,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:07:45,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a80f75-bec3-4103-9fbe-661173139829/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:07:45,205 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a80f75-bec3-4103-9fbe-661173139829/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:07:45,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a80f75-bec3-4103-9fbe-661173139829/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:07:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:07:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 20:07:45,256 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 20:07:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-25 20:07:45,257 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-25 20:07:45,257 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 20:07:45,257 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 20:07:45,257 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 20:07:45,257 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 20:07:45,257 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 20:07:45,257 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 20:07:45,257 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 20:07:45,258 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 20:07:45,258 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 20:07:45,258 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 20:07:45,258 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-25 20:07:45,258 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-25 20:07:45,258 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-25 20:07:45,259 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-25 20:07:45,259 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 20:07:45,259 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 20:07:45,259 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 20:07:45,259 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 20:07:45,259 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 20:07:45,259 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 20:07:45,260 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-25 20:07:45,260 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-25 20:07:45,260 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 20:07:45,260 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 20:07:45,260 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 20:07:45,260 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 20:07:45,260 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 20:07:45,261 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 20:07:45,261 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 20:07:45,261 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 20:07:45,261 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 20:07:45,261 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 20:07:45,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:07:45,261 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-25 20:07:45,262 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-25 20:07:45,262 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 20:07:45,262 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 20:07:45,262 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 20:07:45,262 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 20:07:45,263 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 20:07:45,263 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 20:07:45,264 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-11-25 20:07:45,265 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-11-25 20:07:45,265 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-25 20:07:45,265 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-25 20:07:45,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:07:45,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:07:45,266 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 20:07:45,266 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 20:07:45,475 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:07:45,477 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:07:46,722 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:07:47,350 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:07:47,350 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:07:47,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:07:47 BoogieIcfgContainer [2021-11-25 20:07:47,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:07:47,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:07:47,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:07:47,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:07:47,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:07:43" (1/3) ... [2021-11-25 20:07:47,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3266d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:07:47, skipping insertion in model container [2021-11-25 20:07:47,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:44" (2/3) ... [2021-11-25 20:07:47,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3266d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:07:47, skipping insertion in model container [2021-11-25 20:07:47,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:07:47" (3/3) ... [2021-11-25 20:07:47,363 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product22.cil.c [2021-11-25 20:07:47,371 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:07:47,371 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:07:47,436 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:07:47,445 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:07:47,445 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:07:47,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 258 states have (on average 1.5930232558139534) internal successors, (411), 281 states have internal predecessors, (411), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-25 20:07:47,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-25 20:07:47,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:47,511 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:07:47,511 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:07:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:47,516 INFO L85 PathProgramCache]: Analyzing trace with hash -520217047, now seen corresponding path program 1 times [2021-11-25 20:07:47,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:47,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764523030] [2021-11-25 20:07:47,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:47,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:07:47,972 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:47,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764523030] [2021-11-25 20:07:47,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764523030] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:07:47,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:07:47,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:07:47,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178059579] [2021-11-25 20:07:47,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:07:47,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 20:07:47,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:48,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 20:07:48,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:07:48,014 INFO L87 Difference]: Start difference. First operand has 383 states, 258 states have (on average 1.5930232558139534) internal successors, (411), 281 states have internal predecessors, (411), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-25 20:07:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:48,264 INFO L93 Difference]: Finished difference Result 401 states and 634 transitions. [2021-11-25 20:07:48,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 20:07:48,268 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2021-11-25 20:07:48,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:48,296 INFO L225 Difference]: With dead ends: 401 [2021-11-25 20:07:48,297 INFO L226 Difference]: Without dead ends: 379 [2021-11-25 20:07:48,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:07:48,313 INFO L933 BasicCegarLoop]: 563 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:48,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 563 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:07:48,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-25 20:07:48,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2021-11-25 20:07:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 256 states have (on average 1.58203125) internal successors, (405), 277 states have internal predecessors, (405), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-25 20:07:48,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 596 transitions. [2021-11-25 20:07:48,450 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 596 transitions. Word has length 43 [2021-11-25 20:07:48,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:48,452 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 596 transitions. [2021-11-25 20:07:48,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-25 20:07:48,458 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 596 transitions. [2021-11-25 20:07:48,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 20:07:48,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:48,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:07:48,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:07:48,469 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:07:48,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:48,470 INFO L85 PathProgramCache]: Analyzing trace with hash 832256424, now seen corresponding path program 1 times [2021-11-25 20:07:48,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:48,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297363767] [2021-11-25 20:07:48,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:48,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:07:48,774 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:48,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297363767] [2021-11-25 20:07:48,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297363767] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:07:48,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:07:48,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:07:48,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896316513] [2021-11-25 20:07:48,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:07:48,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:07:48,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:48,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:07:48,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:07:48,778 INFO L87 Difference]: Start difference. First operand 379 states and 596 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-25 20:07:50,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:50,884 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2021-11-25 20:07:50,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:07:50,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2021-11-25 20:07:50,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:50,901 INFO L225 Difference]: With dead ends: 1243 [2021-11-25 20:07:50,902 INFO L226 Difference]: Without dead ends: 880 [2021-11-25 20:07:50,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:07:50,915 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 1600 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:50,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1667 Valid, 1253 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-25 20:07:50,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-11-25 20:07:51,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 793. [2021-11-25 20:07:51,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 558 states have (on average 1.603942652329749) internal successors, (895), 588 states have internal predecessors, (895), 190 states have call successors, (190), 43 states have call predecessors, (190), 44 states have return successors, (192), 174 states have call predecessors, (192), 185 states have call successors, (192) [2021-11-25 20:07:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1277 transitions. [2021-11-25 20:07:51,044 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1277 transitions. Word has length 44 [2021-11-25 20:07:51,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:51,046 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 1277 transitions. [2021-11-25 20:07:51,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-25 20:07:51,047 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1277 transitions. [2021-11-25 20:07:51,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 20:07:51,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:51,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:07:51,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:07:51,058 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:07:51,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:51,059 INFO L85 PathProgramCache]: Analyzing trace with hash -2075127646, now seen corresponding path program 1 times [2021-11-25 20:07:51,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:51,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991866109] [2021-11-25 20:07:51,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:51,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:51,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:07:51,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:51,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991866109] [2021-11-25 20:07:51,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991866109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:07:51,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:07:51,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 20:07:51,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887060418] [2021-11-25 20:07:51,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:07:51,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 20:07:51,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:51,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 20:07:51,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:07:51,345 INFO L87 Difference]: Start difference. First operand 793 states and 1277 transitions. Second operand has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-25 20:07:56,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:56,839 INFO L93 Difference]: Finished difference Result 3318 states and 5440 transitions. [2021-11-25 20:07:56,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-25 20:07:56,840 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 76 [2021-11-25 20:07:56,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:56,871 INFO L225 Difference]: With dead ends: 3318 [2021-11-25 20:07:56,872 INFO L226 Difference]: Without dead ends: 2541 [2021-11-25 20:07:56,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 20:07:56,892 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 2544 mSDsluCounter, 3871 mSDsCounter, 0 mSdLazyCounter, 7456 mSolverCounterSat, 2198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2576 SdHoareTripleChecker+Valid, 4646 SdHoareTripleChecker+Invalid, 9654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2198 IncrementalHoareTripleChecker+Valid, 7456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:56,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2576 Valid, 4646 Invalid, 9654 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2198 Valid, 7456 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-11-25 20:07:56,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-11-25 20:07:57,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 1799. [2021-11-25 20:07:57,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1233 states have (on average 1.5660989456609895) internal successors, (1931), 1305 states have internal predecessors, (1931), 471 states have call successors, (471), 82 states have call predecessors, (471), 94 states have return successors, (490), 444 states have call predecessors, (490), 466 states have call successors, (490) [2021-11-25 20:07:57,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 2892 transitions. [2021-11-25 20:07:57,151 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 2892 transitions. Word has length 76 [2021-11-25 20:07:57,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:57,153 INFO L470 AbstractCegarLoop]: Abstraction has 1799 states and 2892 transitions. [2021-11-25 20:07:57,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-25 20:07:57,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 2892 transitions. [2021-11-25 20:07:57,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-25 20:07:57,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:57,160 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:07:57,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:07:57,161 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:07:57,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:57,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1142842916, now seen corresponding path program 1 times [2021-11-25 20:07:57,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:57,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966097418] [2021-11-25 20:07:57,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:57,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:07:57,413 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:57,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966097418] [2021-11-25 20:07:57,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966097418] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:07:57,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:07:57,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:07:57,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664866396] [2021-11-25 20:07:57,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:07:57,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:07:57,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:57,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:07:57,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:07:57,416 INFO L87 Difference]: Start difference. First operand 1799 states and 2892 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-25 20:08:00,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:00,242 INFO L93 Difference]: Finished difference Result 5054 states and 8153 transitions. [2021-11-25 20:08:00,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 20:08:00,245 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 78 [2021-11-25 20:08:00,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:00,272 INFO L225 Difference]: With dead ends: 5054 [2021-11-25 20:08:00,273 INFO L226 Difference]: Without dead ends: 3273 [2021-11-25 20:08:00,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-11-25 20:08:00,288 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 1741 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 3410 mSolverCounterSat, 601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 3171 SdHoareTripleChecker+Invalid, 4011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 601 IncrementalHoareTripleChecker+Valid, 3410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:00,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1807 Valid, 3171 Invalid, 4011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [601 Valid, 3410 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 20:08:00,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-11-25 20:08:00,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 3111. [2021-11-25 20:08:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3111 states, 2207 states have (on average 1.5894879927503398) internal successors, (3508), 2298 states have internal predecessors, (3508), 729 states have call successors, (729), 144 states have call predecessors, (729), 174 states have return successors, (792), 712 states have call predecessors, (792), 724 states have call successors, (792) [2021-11-25 20:08:00,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 5029 transitions. [2021-11-25 20:08:00,524 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 5029 transitions. Word has length 78 [2021-11-25 20:08:00,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:00,525 INFO L470 AbstractCegarLoop]: Abstraction has 3111 states and 5029 transitions. [2021-11-25 20:08:00,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-25 20:08:00,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 5029 transitions. [2021-11-25 20:08:00,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-25 20:08:00,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:00,530 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:00,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:08:00,531 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:08:00,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:00,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2017325801, now seen corresponding path program 1 times [2021-11-25 20:08:00,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:08:00,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565930711] [2021-11-25 20:08:00,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:00,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:08:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:08:00,730 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:08:00,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565930711] [2021-11-25 20:08:00,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565930711] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:00,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:00,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:08:00,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636175690] [2021-11-25 20:08:00,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:00,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:08:00,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:08:00,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:08:00,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:08:00,734 INFO L87 Difference]: Start difference. First operand 3111 states and 5029 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 20:08:01,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:01,066 INFO L93 Difference]: Finished difference Result 5558 states and 9001 transitions. [2021-11-25 20:08:01,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:08:01,066 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2021-11-25 20:08:01,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:01,098 INFO L225 Difference]: With dead ends: 5558 [2021-11-25 20:08:01,098 INFO L226 Difference]: Without dead ends: 3223 [2021-11-25 20:08:01,114 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 [2021-11-25 20:08:01,117 INFO L933 BasicCegarLoop]: 566 mSDtfsCounter, 6 mSDsluCounter, 2962 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3355 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:01,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 3355 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:08:01,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2021-11-25 20:08:01,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 3181. [2021-11-25 20:08:01,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3181 states, 2257 states have (on average 1.5764288879042978) internal successors, (3558), 2348 states have internal predecessors, (3558), 729 states have call successors, (729), 144 states have call predecessors, (729), 194 states have return successors, (842), 732 states have call predecessors, (842), 724 states have call successors, (842) [2021-11-25 20:08:01,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3181 states to 3181 states and 5129 transitions. [2021-11-25 20:08:01,348 INFO L78 Accepts]: Start accepts. Automaton has 3181 states and 5129 transitions. Word has length 82 [2021-11-25 20:08:01,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:01,348 INFO L470 AbstractCegarLoop]: Abstraction has 3181 states and 5129 transitions. [2021-11-25 20:08:01,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 20:08:01,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3181 states and 5129 transitions. [2021-11-25 20:08:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-25 20:08:01,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:01,381 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:01,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:08:01,382 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:08:01,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:01,383 INFO L85 PathProgramCache]: Analyzing trace with hash 245288187, now seen corresponding path program 1 times [2021-11-25 20:08:01,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:08:01,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929710460] [2021-11-25 20:08:01,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:01,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:08:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:08:01,560 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:08:01,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929710460] [2021-11-25 20:08:01,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929710460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:01,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:01,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:08:01,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319396438] [2021-11-25 20:08:01,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:01,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:08:01,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:08:01,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:08:01,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:08:01,563 INFO L87 Difference]: Start difference. First operand 3181 states and 5129 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 20:08:01,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:01,892 INFO L93 Difference]: Finished difference Result 5664 states and 9141 transitions. [2021-11-25 20:08:01,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:08:01,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 83 [2021-11-25 20:08:01,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:01,922 INFO L225 Difference]: With dead ends: 5664 [2021-11-25 20:08:01,922 INFO L226 Difference]: Without dead ends: 3273 [2021-11-25 20:08:01,937 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 [2021-11-25 20:08:01,939 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 7 mSDsluCounter, 2943 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3331 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:01,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 3331 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:08:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-11-25 20:08:02,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 3191. [2021-11-25 20:08:02,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 2267 states have (on average 1.5738861932068813) internal successors, (3568), 2348 states have internal predecessors, (3568), 729 states have call successors, (729), 144 states have call predecessors, (729), 194 states have return successors, (842), 742 states have call predecessors, (842), 724 states have call successors, (842) [2021-11-25 20:08:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 5139 transitions. [2021-11-25 20:08:02,218 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 5139 transitions. Word has length 83 [2021-11-25 20:08:02,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:02,218 INFO L470 AbstractCegarLoop]: Abstraction has 3191 states and 5139 transitions. [2021-11-25 20:08:02,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 20:08:02,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 5139 transitions. [2021-11-25 20:08:02,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-25 20:08:02,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:02,223 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:02,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:08:02,223 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:08:02,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:02,224 INFO L85 PathProgramCache]: Analyzing trace with hash 126875419, now seen corresponding path program 1 times [2021-11-25 20:08:02,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:08:02,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792227937] [2021-11-25 20:08:02,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:02,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:08:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:08:02,566 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:08:02,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792227937] [2021-11-25 20:08:02,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792227937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:02,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:02,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:08:02,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593764394] [2021-11-25 20:08:02,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:02,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:08:02,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:08:02,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:08:02,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:08:02,569 INFO L87 Difference]: Start difference. First operand 3191 states and 5139 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-25 20:08:06,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:06,291 INFO L93 Difference]: Finished difference Result 10230 states and 16629 transitions. [2021-11-25 20:08:06,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:08:06,292 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 83 [2021-11-25 20:08:06,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:06,351 INFO L225 Difference]: With dead ends: 10230 [2021-11-25 20:08:06,352 INFO L226 Difference]: Without dead ends: 7057 [2021-11-25 20:08:06,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:08:06,374 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 2176 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 2780 mSolverCounterSat, 980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2248 SdHoareTripleChecker+Valid, 2193 SdHoareTripleChecker+Invalid, 3760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 980 IncrementalHoareTripleChecker+Valid, 2780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:06,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2248 Valid, 2193 Invalid, 3760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [980 Valid, 2780 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-25 20:08:06,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7057 states. [2021-11-25 20:08:06,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7057 to 6416. [2021-11-25 20:08:06,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6416 states, 4548 states have (on average 1.5529903254177662) internal successors, (7063), 4743 states have internal predecessors, (7063), 1472 states have call successors, (1472), 292 states have call predecessors, (1472), 395 states have return successors, (1728), 1492 states have call predecessors, (1728), 1467 states have call successors, (1728) [2021-11-25 20:08:07,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6416 states to 6416 states and 10263 transitions. [2021-11-25 20:08:07,046 INFO L78 Accepts]: Start accepts. Automaton has 6416 states and 10263 transitions. Word has length 83 [2021-11-25 20:08:07,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:07,046 INFO L470 AbstractCegarLoop]: Abstraction has 6416 states and 10263 transitions. [2021-11-25 20:08:07,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-25 20:08:07,048 INFO L276 IsEmpty]: Start isEmpty. Operand 6416 states and 10263 transitions. [2021-11-25 20:08:07,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-25 20:08:07,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:07,052 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:07,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:08:07,053 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:08:07,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:07,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1217659309, now seen corresponding path program 1 times [2021-11-25 20:08:07,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:08:07,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664050852] [2021-11-25 20:08:07,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:07,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:08:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:07,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:08:07,241 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:08:07,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664050852] [2021-11-25 20:08:07,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664050852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:07,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:07,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:08:07,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435965445] [2021-11-25 20:08:07,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:07,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:08:07,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:08:07,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:08:07,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:08:07,244 INFO L87 Difference]: Start difference. First operand 6416 states and 10263 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-25 20:08:10,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:10,363 INFO L93 Difference]: Finished difference Result 16067 states and 25940 transitions. [2021-11-25 20:08:10,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:08:10,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) Word has length 89 [2021-11-25 20:08:10,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:10,493 INFO L225 Difference]: With dead ends: 16067 [2021-11-25 20:08:10,494 INFO L226 Difference]: Without dead ends: 10783 [2021-11-25 20:08:10,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:08:10,530 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 3310 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 1551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3476 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 3471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1551 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:10,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3476 Valid, 1585 Invalid, 3471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1551 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 20:08:10,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10783 states. [2021-11-25 20:08:11,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10783 to 10535. [2021-11-25 20:08:11,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10535 states, 7317 states have (on average 1.5181085144184776) internal successors, (11108), 7680 states have internal predecessors, (11108), 2526 states have call successors, (2526), 523 states have call predecessors, (2526), 691 states have return successors, (3040), 2527 states have call predecessors, (3040), 2521 states have call successors, (3040) [2021-11-25 20:08:11,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10535 states to 10535 states and 16674 transitions. [2021-11-25 20:08:11,531 INFO L78 Accepts]: Start accepts. Automaton has 10535 states and 16674 transitions. Word has length 89 [2021-11-25 20:08:11,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:11,531 INFO L470 AbstractCegarLoop]: Abstraction has 10535 states and 16674 transitions. [2021-11-25 20:08:11,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-25 20:08:11,532 INFO L276 IsEmpty]: Start isEmpty. Operand 10535 states and 16674 transitions. [2021-11-25 20:08:11,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 20:08:11,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:11,536 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:11,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:08:11,537 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:08:11,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:11,537 INFO L85 PathProgramCache]: Analyzing trace with hash 982523748, now seen corresponding path program 1 times [2021-11-25 20:08:11,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:08:11,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910694122] [2021-11-25 20:08:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:11,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:08:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:08:11,667 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:08:11,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910694122] [2021-11-25 20:08:11,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910694122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:11,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:11,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:08:11,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439304358] [2021-11-25 20:08:11,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:11,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:08:11,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:08:11,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:08:11,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:08:11,670 INFO L87 Difference]: Start difference. First operand 10535 states and 16674 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-25 20:08:13,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:13,863 INFO L93 Difference]: Finished difference Result 20824 states and 33110 transitions. [2021-11-25 20:08:13,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:08:13,866 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 92 [2021-11-25 20:08:13,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:13,995 INFO L225 Difference]: With dead ends: 20824 [2021-11-25 20:08:13,995 INFO L226 Difference]: Without dead ends: 11720 [2021-11-25 20:08:14,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:08:14,034 INFO L933 BasicCegarLoop]: 622 mSDtfsCounter, 986 mSDsluCounter, 1396 mSDsCounter, 0 mSdLazyCounter, 2233 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 2653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 2233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:14,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1062 Valid, 1939 Invalid, 2653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 2233 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-25 20:08:14,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11720 states. [2021-11-25 20:08:14,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11720 to 10715. [2021-11-25 20:08:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10715 states, 7437 states have (on average 1.5135135135135136) internal successors, (11256), 7828 states have internal predecessors, (11256), 2530 states have call successors, (2530), 555 states have call predecessors, (2530), 747 states have return successors, (3118), 2527 states have call predecessors, (3118), 2525 states have call successors, (3118) [2021-11-25 20:08:15,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10715 states to 10715 states and 16904 transitions. [2021-11-25 20:08:15,095 INFO L78 Accepts]: Start accepts. Automaton has 10715 states and 16904 transitions. Word has length 92 [2021-11-25 20:08:15,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:15,095 INFO L470 AbstractCegarLoop]: Abstraction has 10715 states and 16904 transitions. [2021-11-25 20:08:15,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-25 20:08:15,096 INFO L276 IsEmpty]: Start isEmpty. Operand 10715 states and 16904 transitions. [2021-11-25 20:08:15,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 20:08:15,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:15,101 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:15,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:08:15,101 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:08:15,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:15,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1413202189, now seen corresponding path program 1 times [2021-11-25 20:08:15,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:08:15,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908315498] [2021-11-25 20:08:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:15,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:08:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:08:15,211 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:08:15,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908315498] [2021-11-25 20:08:15,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908315498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:15,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:15,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:08:15,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519696917] [2021-11-25 20:08:15,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:15,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:08:15,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:08:15,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:08:15,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:08:15,213 INFO L87 Difference]: Start difference. First operand 10715 states and 16904 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:08:17,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:17,060 INFO L93 Difference]: Finished difference Result 28072 states and 44883 transitions. [2021-11-25 20:08:17,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:08:17,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2021-11-25 20:08:17,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:17,159 INFO L225 Difference]: With dead ends: 28072 [2021-11-25 20:08:17,159 INFO L226 Difference]: Without dead ends: 17374 [2021-11-25 20:08:17,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:08:17,209 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 1155 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1226 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:17,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1226 Valid, 981 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 20:08:17,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17374 states. [2021-11-25 20:08:18,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17374 to 16005. [2021-11-25 20:08:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16005 states, 11133 states have (on average 1.515314829785323) internal successors, (16870), 11765 states have internal predecessors, (16870), 3710 states have call successors, (3710), 831 states have call predecessors, (3710), 1161 states have return successors, (4803), 3674 states have call predecessors, (4803), 3705 states have call successors, (4803) [2021-11-25 20:08:18,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16005 states to 16005 states and 25383 transitions. [2021-11-25 20:08:18,558 INFO L78 Accepts]: Start accepts. Automaton has 16005 states and 25383 transitions. Word has length 95 [2021-11-25 20:08:18,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:18,558 INFO L470 AbstractCegarLoop]: Abstraction has 16005 states and 25383 transitions. [2021-11-25 20:08:18,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:08:18,559 INFO L276 IsEmpty]: Start isEmpty. Operand 16005 states and 25383 transitions. [2021-11-25 20:08:18,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-25 20:08:18,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:18,564 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:18,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:08:18,565 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:08:18,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:18,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1770846730, now seen corresponding path program 1 times [2021-11-25 20:08:18,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:08:18,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105559602] [2021-11-25 20:08:18,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:18,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:08:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:08:18,704 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:08:18,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105559602] [2021-11-25 20:08:18,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105559602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:18,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:18,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:08:18,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904083422] [2021-11-25 20:08:18,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:18,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:08:18,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:08:18,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:08:18,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:08:18,707 INFO L87 Difference]: Start difference. First operand 16005 states and 25383 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:08:21,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:21,472 INFO L93 Difference]: Finished difference Result 43308 states and 70007 transitions. [2021-11-25 20:08:21,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:08:21,473 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), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 97 [2021-11-25 20:08:21,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:21,623 INFO L225 Difference]: With dead ends: 43308 [2021-11-25 20:08:21,623 INFO L226 Difference]: Without dead ends: 27321 [2021-11-25 20:08:21,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:08:21,687 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 1142 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:21,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1212 Valid, 990 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 20:08:21,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27321 states. [2021-11-25 20:08:23,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27321 to 25538. [2021-11-25 20:08:23,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25538 states, 17800 states have (on average 1.5169662921348315) internal successors, (27002), 18969 states have internal predecessors, (27002), 5753 states have call successors, (5753), 1383 states have call predecessors, (5753), 1984 states have return successors, (8120), 5626 states have call predecessors, (8120), 5748 states have call successors, (8120) [2021-11-25 20:08:23,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25538 states to 25538 states and 40875 transitions. [2021-11-25 20:08:23,819 INFO L78 Accepts]: Start accepts. Automaton has 25538 states and 40875 transitions. Word has length 97 [2021-11-25 20:08:23,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:23,819 INFO L470 AbstractCegarLoop]: Abstraction has 25538 states and 40875 transitions. [2021-11-25 20:08:23,820 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), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:08:23,820 INFO L276 IsEmpty]: Start isEmpty. Operand 25538 states and 40875 transitions. [2021-11-25 20:08:23,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-25 20:08:23,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:23,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:23,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 20:08:23,824 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:08:23,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:23,825 INFO L85 PathProgramCache]: Analyzing trace with hash -938464453, now seen corresponding path program 1 times [2021-11-25 20:08:23,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:08:23,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046271246] [2021-11-25 20:08:23,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:23,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:08:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:08:23,937 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:08:23,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046271246] [2021-11-25 20:08:23,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046271246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:23,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:23,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:08:23,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061510696] [2021-11-25 20:08:23,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:23,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:08:23,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:08:23,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:08:23,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:08:23,940 INFO L87 Difference]: Start difference. First operand 25538 states and 40875 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:08:27,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:27,999 INFO L93 Difference]: Finished difference Result 72202 states and 119368 transitions. [2021-11-25 20:08:27,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:08:27,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 98 [2021-11-25 20:08:28,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:28,262 INFO L225 Difference]: With dead ends: 72202 [2021-11-25 20:08:28,262 INFO L226 Difference]: Without dead ends: 46684 [2021-11-25 20:08:28,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:08:28,377 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 1129 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1198 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:28,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1198 Valid, 999 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 20:08:28,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46684 states. [2021-11-25 20:08:31,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46684 to 45083. [2021-11-25 20:08:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45083 states, 31429 states have (on average 1.515002068153616) internal successors, (47615), 33722 states have internal predecessors, (47615), 9949 states have call successors, (9949), 2487 states have call predecessors, (9949), 3704 states have return successors, (15840), 9650 states have call predecessors, (15840), 9944 states have call successors, (15840) [2021-11-25 20:08:32,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45083 states to 45083 states and 73404 transitions. [2021-11-25 20:08:32,179 INFO L78 Accepts]: Start accepts. Automaton has 45083 states and 73404 transitions. Word has length 98 [2021-11-25 20:08:32,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:32,180 INFO L470 AbstractCegarLoop]: Abstraction has 45083 states and 73404 transitions. [2021-11-25 20:08:32,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:08:32,180 INFO L276 IsEmpty]: Start isEmpty. Operand 45083 states and 73404 transitions. [2021-11-25 20:08:32,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-25 20:08:32,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:32,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:32,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 20:08:32,186 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:08:32,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:32,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1295959992, now seen corresponding path program 1 times [2021-11-25 20:08:32,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:08:32,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088227550] [2021-11-25 20:08:32,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:32,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:08:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:08:32,294 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:08:32,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088227550] [2021-11-25 20:08:32,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088227550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:32,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:32,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:08:32,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118319387] [2021-11-25 20:08:32,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:32,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:08:32,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:08:32,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:08:32,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:08:32,297 INFO L87 Difference]: Start difference. First operand 45083 states and 73404 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:08:39,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:39,148 INFO L93 Difference]: Finished difference Result 131416 states and 225810 transitions. [2021-11-25 20:08:39,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:08:39,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 98 [2021-11-25 20:08:39,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:39,630 INFO L225 Difference]: With dead ends: 131416 [2021-11-25 20:08:39,630 INFO L226 Difference]: Without dead ends: 86357 [2021-11-25 20:08:39,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:08:39,827 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 1116 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:39,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1184 Valid, 1011 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 20:08:40,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86357 states. [2021-11-25 20:08:46,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86357 to 83692. [2021-11-25 20:08:46,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83692 states, 58270 states have (on average 1.5097305646130084) internal successors, (87972), 62931 states have internal predecessors, (87972), 18157 states have call successors, (18157), 4695 states have call predecessors, (18157), 7264 states have return successors, (34232), 17514 states have call predecessors, (34232), 18152 states have call successors, (34232) [2021-11-25 20:08:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83692 states to 83692 states and 140361 transitions. [2021-11-25 20:08:46,660 INFO L78 Accepts]: Start accepts. Automaton has 83692 states and 140361 transitions. Word has length 98 [2021-11-25 20:08:46,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:46,660 INFO L470 AbstractCegarLoop]: Abstraction has 83692 states and 140361 transitions. [2021-11-25 20:08:46,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:08:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 83692 states and 140361 transitions. [2021-11-25 20:08:46,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-25 20:08:46,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:46,665 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:46,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 20:08:46,666 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:08:46,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:46,666 INFO L85 PathProgramCache]: Analyzing trace with hash 74498205, now seen corresponding path program 1 times [2021-11-25 20:08:46,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:08:46,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192515947] [2021-11-25 20:08:46,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:46,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:08:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:08:46,760 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:08:46,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192515947] [2021-11-25 20:08:46,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192515947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:46,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:46,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:08:46,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513676903] [2021-11-25 20:08:46,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:46,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:08:46,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:08:46,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:08:46,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:08:46,763 INFO L87 Difference]: Start difference. First operand 83692 states and 140361 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16)