./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 aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b50bf38-2f94-40ef-b158-850b1b2b43c1/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b50bf38-2f94-40ef-b158-850b1b2b43c1/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b50bf38-2f94-40ef-b158-850b1b2b43c1/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b50bf38-2f94-40ef-b158-850b1b2b43c1/bin/utaipan-EQgc7hIp5V/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_0b50bf38-2f94-40ef-b158-850b1b2b43c1/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b50bf38-2f94-40ef-b158-850b1b2b43c1/bin/utaipan-EQgc7hIp5V --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 0.2.1-dev-aef121e [2021-11-23 02:35:48,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:35:48,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:35:48,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:35:48,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:35:48,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:35:48,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:35:48,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:35:48,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:35:48,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:35:48,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:35:48,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:35:48,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:35:48,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:35:48,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:35:48,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:35:48,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:35:48,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:35:48,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:35:48,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:35:48,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:35:48,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:35:48,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:35:48,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:35:48,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:35:48,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:35:48,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:35:48,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:35:48,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:35:48,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:35:48,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:35:48,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:35:48,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:35:48,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:35:48,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:35:48,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:35:48,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:35:48,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:35:48,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:35:48,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:35:48,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:35:48,323 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b50bf38-2f94-40ef-b158-850b1b2b43c1/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:35:48,362 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:35:48,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:35:48,368 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:35:48,368 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:35:48,369 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:35:48,376 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:35:48,376 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:35:48,377 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:35:48,377 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:35:48,377 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:35:48,378 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:35:48,378 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:35:48,379 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:35:48,379 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:35:48,379 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:35:48,380 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:35:48,380 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:35:48,380 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:35:48,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:35:48,381 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:35:48,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:35:48,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:35:48,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:35:48,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:35:48,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:35:48,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:35:48,384 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:35:48,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:35:48,385 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:35:48,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:35:48,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:35:48,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:35:48,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:35:48,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:35:48,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:35:48,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:35:48,387 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:35:48,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:35:48,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:35:48,388 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:35:48,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:35:48,388 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_0b50bf38-2f94-40ef-b158-850b1b2b43c1/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b50bf38-2f94-40ef-b158-850b1b2b43c1/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a [2021-11-23 02:35:48,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:35:48,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:35:48,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:35:48,660 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:35:48,661 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:35:48,662 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b50bf38-2f94-40ef-b158-850b1b2b43c1/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2021-11-23 02:35:48,723 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b50bf38-2f94-40ef-b158-850b1b2b43c1/bin/utaipan-EQgc7hIp5V/data/774d36502/bf149461dae248d085724f3362ef9f33/FLAG12fc00699 [2021-11-23 02:35:49,377 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:35:49,378 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b50bf38-2f94-40ef-b158-850b1b2b43c1/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2021-11-23 02:35:49,414 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b50bf38-2f94-40ef-b158-850b1b2b43c1/bin/utaipan-EQgc7hIp5V/data/774d36502/bf149461dae248d085724f3362ef9f33/FLAG12fc00699 [2021-11-23 02:35:49,604 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b50bf38-2f94-40ef-b158-850b1b2b43c1/bin/utaipan-EQgc7hIp5V/data/774d36502/bf149461dae248d085724f3362ef9f33 [2021-11-23 02:35:49,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:35:49,608 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:35:49,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:35:49,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:35:49,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:35:49,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:35:49" (1/1) ... [2021-11-23 02:35:49,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55649cc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:49, skipping insertion in model container [2021-11-23 02:35:49,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:35:49" (1/1) ... [2021-11-23 02:35:49,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:35:49,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:35:49,940 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_0b50bf38-2f94-40ef-b158-850b1b2b43c1/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c[1545,1558] [2021-11-23 02:35:50,401 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:35:50,410 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:35:50,423 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_0b50bf38-2f94-40ef-b158-850b1b2b43c1/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c[1545,1558] [2021-11-23 02:35:50,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:35:50,614 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:35:50,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:50 WrapperNode [2021-11-23 02:35:50,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:35:50,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:35:50,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:35:50,617 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:35:50,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:50" (1/1) ... [2021-11-23 02:35:50,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:50" (1/1) ... [2021-11-23 02:35:50,756 INFO L137 Inliner]: procedures = 94, calls = 345, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 876 [2021-11-23 02:35:50,756 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:35:50,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:35:50,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:35:50,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:35:50,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:50" (1/1) ... [2021-11-23 02:35:50,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:50" (1/1) ... [2021-11-23 02:35:50,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:50" (1/1) ... [2021-11-23 02:35:50,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:50" (1/1) ... [2021-11-23 02:35:50,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:50" (1/1) ... [2021-11-23 02:35:50,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:50" (1/1) ... [2021-11-23 02:35:50,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:50" (1/1) ... [2021-11-23 02:35:50,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:35:50,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:35:50,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:35:50,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:35:50,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:50" (1/1) ... [2021-11-23 02:35:50,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:35:50,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b50bf38-2f94-40ef-b158-850b1b2b43c1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:35:50,945 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b50bf38-2f94-40ef-b158-850b1b2b43c1/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:35:50,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b50bf38-2f94-40ef-b158-850b1b2b43c1/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:35:50,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:35:50,992 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-23 02:35:50,992 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-23 02:35:50,992 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-23 02:35:50,993 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-23 02:35:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-23 02:35:50,993 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-23 02:35:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-23 02:35:50,993 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-23 02:35:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-23 02:35:50,994 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-23 02:35:50,994 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-23 02:35:50,994 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-23 02:35:50,994 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-23 02:35:50,994 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-23 02:35:50,995 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-23 02:35:50,995 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-23 02:35:50,995 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-23 02:35:50,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-23 02:35:50,995 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-23 02:35:50,996 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-23 02:35:50,996 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-23 02:35:50,996 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-23 02:35:50,996 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-23 02:35:50,996 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-23 02:35:50,996 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-23 02:35:50,996 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-23 02:35:50,996 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-23 02:35:50,996 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-23 02:35:50,997 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-23 02:35:50,997 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-23 02:35:50,997 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-23 02:35:50,997 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-23 02:35:50,997 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-23 02:35:50,997 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-23 02:35:50,997 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-23 02:35:50,997 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-23 02:35:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:35:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-23 02:35:50,998 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-23 02:35:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-23 02:35:50,998 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-23 02:35:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-23 02:35:50,999 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-23 02:35:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-23 02:35:50,999 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-23 02:35:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-11-23 02:35:51,001 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-11-23 02:35:51,002 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-23 02:35:51,002 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-23 02:35:51,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:35:51,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:35:51,003 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-23 02:35:51,004 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-23 02:35:51,228 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:35:51,231 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:35:52,243 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:35:52,832 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:35:52,833 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:35:52,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:35:52 BoogieIcfgContainer [2021-11-23 02:35:52,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:35:52,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:35:52,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:35:52,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:35:52,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:35:49" (1/3) ... [2021-11-23 02:35:52,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe06bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:35:52, skipping insertion in model container [2021-11-23 02:35:52,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:50" (2/3) ... [2021-11-23 02:35:52,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe06bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:35:52, skipping insertion in model container [2021-11-23 02:35:52,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:35:52" (3/3) ... [2021-11-23 02:35:52,849 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product22.cil.c [2021-11-23 02:35:52,855 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:35:52,856 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:35:52,954 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:35:52,964 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 [2021-11-23 02:35:52,964 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:35:53,011 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) [2021-11-23 02:35:53,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 02:35:53,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:53,038 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] [2021-11-23 02:35:53,039 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:53,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:53,045 INFO L85 PathProgramCache]: Analyzing trace with hash -520217047, now seen corresponding path program 1 times [2021-11-23 02:35:53,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:53,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921464356] [2021-11-23 02:35:53,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:53,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:35:53,408 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:53,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921464356] [2021-11-23 02:35:53,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921464356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:53,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:35:53,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:35:53,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269753313] [2021-11-23 02:35:53,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:53,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:35:53,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:53,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:35:53,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:35:53,456 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) [2021-11-23 02:35:53,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:53,683 INFO L93 Difference]: Finished difference Result 401 states and 634 transitions. [2021-11-23 02:35:53,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:35:53,686 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 [2021-11-23 02:35:53,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:53,716 INFO L225 Difference]: With dead ends: 401 [2021-11-23 02:35:53,717 INFO L226 Difference]: Without dead ends: 379 [2021-11-23 02:35:53,722 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 [2021-11-23 02:35:53,727 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, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:53,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 563 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:35:53,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-23 02:35:53,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2021-11-23 02:35:53,841 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) [2021-11-23 02:35:53,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 596 transitions. [2021-11-23 02:35:53,849 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 596 transitions. Word has length 43 [2021-11-23 02:35:53,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:53,852 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 596 transitions. [2021-11-23 02:35:53,853 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) [2021-11-23 02:35:53,859 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 596 transitions. [2021-11-23 02:35:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 02:35:53,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:53,866 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] [2021-11-23 02:35:53,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:35:53,868 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:53,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:53,869 INFO L85 PathProgramCache]: Analyzing trace with hash 832256424, now seen corresponding path program 1 times [2021-11-23 02:35:53,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:53,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938975933] [2021-11-23 02:35:53,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:53,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:35:54,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:54,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938975933] [2021-11-23 02:35:54,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938975933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:54,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:35:54,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:35:54,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284245971] [2021-11-23 02:35:54,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:54,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:35:54,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:54,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:35:54,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:35:54,122 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) [2021-11-23 02:35:56,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:56,300 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2021-11-23 02:35:56,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:35:56,301 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 [2021-11-23 02:35:56,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:56,310 INFO L225 Difference]: With dead ends: 1243 [2021-11-23 02:35:56,310 INFO L226 Difference]: Without dead ends: 880 [2021-11-23 02:35:56,315 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 [2021-11-23 02:35:56,316 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 1600 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:56,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1667 Valid, 1253 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 02:35:56,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-11-23 02:35:56,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 793. [2021-11-23 02:35:56,401 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) [2021-11-23 02:35:56,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1277 transitions. [2021-11-23 02:35:56,413 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1277 transitions. Word has length 44 [2021-11-23 02:35:56,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:56,413 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 1277 transitions. [2021-11-23 02:35:56,414 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) [2021-11-23 02:35:56,414 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1277 transitions. [2021-11-23 02:35:56,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 02:35:56,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:56,421 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] [2021-11-23 02:35:56,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:35:56,421 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:56,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:56,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2075127646, now seen corresponding path program 1 times [2021-11-23 02:35:56,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:56,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553016456] [2021-11-23 02:35:56,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:56,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:35:56,740 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:56,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553016456] [2021-11-23 02:35:56,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553016456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:56,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:35:56,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-23 02:35:56,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540630207] [2021-11-23 02:35:56,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:56,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:35:56,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:56,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:35:56,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:35:56,743 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) [2021-11-23 02:36:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:02,132 INFO L93 Difference]: Finished difference Result 3318 states and 5440 transitions. [2021-11-23 02:36:02,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-23 02:36:02,132 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 [2021-11-23 02:36:02,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:02,166 INFO L225 Difference]: With dead ends: 3318 [2021-11-23 02:36:02,166 INFO L226 Difference]: Without dead ends: 2541 [2021-11-23 02:36:02,181 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 [2021-11-23 02:36:02,189 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 2544 mSDsluCounter, 3871 mSDsCounter, 0 mSdLazyCounter, 7456 mSolverCounterSat, 2198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s 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, 4.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:02,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2576 Valid, 4646 Invalid, 9654 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2198 Valid, 7456 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-23 02:36:02,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-11-23 02:36:02,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 1799. [2021-11-23 02:36:02,367 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) [2021-11-23 02:36:02,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 2892 transitions. [2021-11-23 02:36:02,415 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 2892 transitions. Word has length 76 [2021-11-23 02:36:02,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:02,417 INFO L470 AbstractCegarLoop]: Abstraction has 1799 states and 2892 transitions. [2021-11-23 02:36:02,418 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) [2021-11-23 02:36:02,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 2892 transitions. [2021-11-23 02:36:02,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 02:36:02,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:02,424 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] [2021-11-23 02:36:02,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:36:02,425 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:02,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:02,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1142842916, now seen corresponding path program 1 times [2021-11-23 02:36:02,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:02,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134459281] [2021-11-23 02:36:02,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:02,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:36:02,675 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:02,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134459281] [2021-11-23 02:36:02,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134459281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:02,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:36:02,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 02:36:02,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099967462] [2021-11-23 02:36:02,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:02,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:36:02,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:02,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:36:02,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:36:02,679 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) [2021-11-23 02:36:05,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:05,551 INFO L93 Difference]: Finished difference Result 5054 states and 8153 transitions. [2021-11-23 02:36:05,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 02:36:05,553 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 [2021-11-23 02:36:05,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:05,587 INFO L225 Difference]: With dead ends: 5054 [2021-11-23 02:36:05,587 INFO L226 Difference]: Without dead ends: 3273 [2021-11-23 02:36:05,601 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 [2021-11-23 02:36:05,603 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 [2021-11-23 02:36:05,603 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] [2021-11-23 02:36:05,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-11-23 02:36:05,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 3111. [2021-11-23 02:36:05,867 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) [2021-11-23 02:36:05,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 5029 transitions. [2021-11-23 02:36:05,904 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 5029 transitions. Word has length 78 [2021-11-23 02:36:05,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:05,905 INFO L470 AbstractCegarLoop]: Abstraction has 3111 states and 5029 transitions. [2021-11-23 02:36:05,906 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) [2021-11-23 02:36:05,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 5029 transitions. [2021-11-23 02:36:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 02:36:05,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:05,912 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] [2021-11-23 02:36:05,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:36:05,912 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:05,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:05,913 INFO L85 PathProgramCache]: Analyzing trace with hash 2017325801, now seen corresponding path program 1 times [2021-11-23 02:36:05,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:05,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235313712] [2021-11-23 02:36:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:05,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:36:06,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:06,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235313712] [2021-11-23 02:36:06,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235313712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:06,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:36:06,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 02:36:06,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096951213] [2021-11-23 02:36:06,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:06,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:36:06,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:06,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:36:06,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:36:06,086 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) [2021-11-23 02:36:06,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:06,457 INFO L93 Difference]: Finished difference Result 5558 states and 9001 transitions. [2021-11-23 02:36:06,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:36:06,459 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 [2021-11-23 02:36:06,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:06,485 INFO L225 Difference]: With dead ends: 5558 [2021-11-23 02:36:06,486 INFO L226 Difference]: Without dead ends: 3223 [2021-11-23 02:36:06,499 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 [2021-11-23 02:36:06,502 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, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:06,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 3355 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:36:06,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2021-11-23 02:36:06,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 3181. [2021-11-23 02:36:06,707 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) [2021-11-23 02:36:06,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3181 states to 3181 states and 5129 transitions. [2021-11-23 02:36:06,730 INFO L78 Accepts]: Start accepts. Automaton has 3181 states and 5129 transitions. Word has length 82 [2021-11-23 02:36:06,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:06,731 INFO L470 AbstractCegarLoop]: Abstraction has 3181 states and 5129 transitions. [2021-11-23 02:36:06,731 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) [2021-11-23 02:36:06,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3181 states and 5129 transitions. [2021-11-23 02:36:06,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 02:36:06,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:06,735 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] [2021-11-23 02:36:06,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:36:06,735 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:06,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:06,736 INFO L85 PathProgramCache]: Analyzing trace with hash 245288187, now seen corresponding path program 1 times [2021-11-23 02:36:06,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:06,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615708635] [2021-11-23 02:36:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:06,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:36:06,885 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:06,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615708635] [2021-11-23 02:36:06,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615708635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:06,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:36:06,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 02:36:06,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738326825] [2021-11-23 02:36:06,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:06,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:36:06,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:06,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:36:06,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:36:06,889 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) [2021-11-23 02:36:07,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:07,257 INFO L93 Difference]: Finished difference Result 5664 states and 9141 transitions. [2021-11-23 02:36:07,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:36:07,258 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 [2021-11-23 02:36:07,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:07,292 INFO L225 Difference]: With dead ends: 5664 [2021-11-23 02:36:07,292 INFO L226 Difference]: Without dead ends: 3273 [2021-11-23 02:36:07,309 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 [2021-11-23 02:36:07,311 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, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:07,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 3331 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:36:07,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-11-23 02:36:07,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 3191. [2021-11-23 02:36:07,508 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) [2021-11-23 02:36:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 5139 transitions. [2021-11-23 02:36:07,531 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 5139 transitions. Word has length 83 [2021-11-23 02:36:07,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:07,531 INFO L470 AbstractCegarLoop]: Abstraction has 3191 states and 5139 transitions. [2021-11-23 02:36:07,532 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) [2021-11-23 02:36:07,532 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 5139 transitions. [2021-11-23 02:36:07,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 02:36:07,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:07,536 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] [2021-11-23 02:36:07,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:36:07,536 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:07,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:07,537 INFO L85 PathProgramCache]: Analyzing trace with hash 126875419, now seen corresponding path program 1 times [2021-11-23 02:36:07,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:07,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462209283] [2021-11-23 02:36:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:07,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:07,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:36:07,821 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:07,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462209283] [2021-11-23 02:36:07,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462209283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:07,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:36:07,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 02:36:07,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81687369] [2021-11-23 02:36:07,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:07,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:36:07,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:07,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:36:07,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:36:07,823 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) [2021-11-23 02:36:11,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:11,717 INFO L93 Difference]: Finished difference Result 10230 states and 16629 transitions. [2021-11-23 02:36:11,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:36:11,718 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 [2021-11-23 02:36:11,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:11,780 INFO L225 Difference]: With dead ends: 10230 [2021-11-23 02:36:11,780 INFO L226 Difference]: Without dead ends: 7057 [2021-11-23 02:36:11,800 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 [2021-11-23 02:36:11,803 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 2176 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 2780 mSolverCounterSat, 980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s 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, 3.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:11,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2248 Valid, 2193 Invalid, 3760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [980 Valid, 2780 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-23 02:36:11,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7057 states. [2021-11-23 02:36:12,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7057 to 6416. [2021-11-23 02:36:12,411 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) [2021-11-23 02:36:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6416 states to 6416 states and 10263 transitions. [2021-11-23 02:36:12,461 INFO L78 Accepts]: Start accepts. Automaton has 6416 states and 10263 transitions. Word has length 83 [2021-11-23 02:36:12,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:12,462 INFO L470 AbstractCegarLoop]: Abstraction has 6416 states and 10263 transitions. [2021-11-23 02:36:12,463 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) [2021-11-23 02:36:12,463 INFO L276 IsEmpty]: Start isEmpty. Operand 6416 states and 10263 transitions. [2021-11-23 02:36:12,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 02:36:12,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:12,467 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] [2021-11-23 02:36:12,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:36:12,468 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:12,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1217659309, now seen corresponding path program 1 times [2021-11-23 02:36:12,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:12,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420418440] [2021-11-23 02:36:12,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:12,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:36:12,641 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:12,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420418440] [2021-11-23 02:36:12,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420418440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:12,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:36:12,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 02:36:12,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72707603] [2021-11-23 02:36:12,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:12,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:36:12,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:12,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:36:12,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:36:12,643 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) [2021-11-23 02:36:15,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:15,570 INFO L93 Difference]: Finished difference Result 16067 states and 25940 transitions. [2021-11-23 02:36:15,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:36:15,571 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 [2021-11-23 02:36:15,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:15,653 INFO L225 Difference]: With dead ends: 16067 [2021-11-23 02:36:15,654 INFO L226 Difference]: Without dead ends: 10783 [2021-11-23 02:36:15,689 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 [2021-11-23 02:36:15,690 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 3310 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 1550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3475 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 3473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1550 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:15,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3475 Valid, 1585 Invalid, 3473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1550 Valid, 1923 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 02:36:15,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10783 states. [2021-11-23 02:36:16,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10783 to 10535. [2021-11-23 02:36:16,681 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) [2021-11-23 02:36:16,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10535 states to 10535 states and 16674 transitions. [2021-11-23 02:36:16,744 INFO L78 Accepts]: Start accepts. Automaton has 10535 states and 16674 transitions. Word has length 89 [2021-11-23 02:36:16,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:16,745 INFO L470 AbstractCegarLoop]: Abstraction has 10535 states and 16674 transitions. [2021-11-23 02:36:16,745 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) [2021-11-23 02:36:16,746 INFO L276 IsEmpty]: Start isEmpty. Operand 10535 states and 16674 transitions. [2021-11-23 02:36:16,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 02:36:16,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:16,749 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] [2021-11-23 02:36:16,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:36:16,750 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:16,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:16,751 INFO L85 PathProgramCache]: Analyzing trace with hash 982523748, now seen corresponding path program 1 times [2021-11-23 02:36:16,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:16,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421847040] [2021-11-23 02:36:16,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:16,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:36:16,975 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:16,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421847040] [2021-11-23 02:36:16,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421847040] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:16,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:36:16,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 02:36:16,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529723956] [2021-11-23 02:36:16,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:16,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:36:16,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:16,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:36:16,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:36:16,977 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) [2021-11-23 02:36:19,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:19,234 INFO L93 Difference]: Finished difference Result 20824 states and 33110 transitions. [2021-11-23 02:36:19,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:36:19,235 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 [2021-11-23 02:36:19,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:19,300 INFO L225 Difference]: With dead ends: 20824 [2021-11-23 02:36:19,300 INFO L226 Difference]: Without dead ends: 11720 [2021-11-23 02:36:19,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:36:19,329 INFO L933 BasicCegarLoop]: 622 mSDtfsCounter, 986 mSDsluCounter, 1396 mSDsCounter, 0 mSdLazyCounter, 2233 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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 [2021-11-23 02:36:19,329 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] [2021-11-23 02:36:19,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11720 states. [2021-11-23 02:36:20,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11720 to 10715. [2021-11-23 02:36:20,333 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) [2021-11-23 02:36:20,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10715 states to 10715 states and 16904 transitions. [2021-11-23 02:36:20,403 INFO L78 Accepts]: Start accepts. Automaton has 10715 states and 16904 transitions. Word has length 92 [2021-11-23 02:36:20,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:20,404 INFO L470 AbstractCegarLoop]: Abstraction has 10715 states and 16904 transitions. [2021-11-23 02:36:20,404 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) [2021-11-23 02:36:20,405 INFO L276 IsEmpty]: Start isEmpty. Operand 10715 states and 16904 transitions. [2021-11-23 02:36:20,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 02:36:20,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:20,410 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] [2021-11-23 02:36:20,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:36:20,410 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:20,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:20,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1413202189, now seen corresponding path program 1 times [2021-11-23 02:36:20,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:20,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508833540] [2021-11-23 02:36:20,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:20,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:36:20,530 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:20,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508833540] [2021-11-23 02:36:20,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508833540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:20,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:36:20,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:36:20,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477573114] [2021-11-23 02:36:20,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:20,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:36:20,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:20,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:36:20,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:36:20,533 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) [2021-11-23 02:36:22,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:22,573 INFO L93 Difference]: Finished difference Result 28072 states and 44883 transitions. [2021-11-23 02:36:22,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:36:22,574 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 [2021-11-23 02:36:22,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:22,678 INFO L225 Difference]: With dead ends: 28072 [2021-11-23 02:36:22,679 INFO L226 Difference]: Without dead ends: 17374 [2021-11-23 02:36:22,713 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 [2021-11-23 02:36:22,714 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 1155 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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 [2021-11-23 02:36:22,716 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] [2021-11-23 02:36:22,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17374 states. [2021-11-23 02:36:24,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17374 to 16005. [2021-11-23 02:36:24,065 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) [2021-11-23 02:36:24,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16005 states to 16005 states and 25383 transitions. [2021-11-23 02:36:24,179 INFO L78 Accepts]: Start accepts. Automaton has 16005 states and 25383 transitions. Word has length 95 [2021-11-23 02:36:24,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:24,180 INFO L470 AbstractCegarLoop]: Abstraction has 16005 states and 25383 transitions. [2021-11-23 02:36:24,180 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) [2021-11-23 02:36:24,180 INFO L276 IsEmpty]: Start isEmpty. Operand 16005 states and 25383 transitions. [2021-11-23 02:36:24,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 02:36:24,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:24,185 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] [2021-11-23 02:36:24,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:36:24,186 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:24,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:24,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1770846730, now seen corresponding path program 1 times [2021-11-23 02:36:24,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:24,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968462004] [2021-11-23 02:36:24,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:24,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:36:24,320 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:24,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968462004] [2021-11-23 02:36:24,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968462004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:24,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:36:24,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:36:24,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142818569] [2021-11-23 02:36:24,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:24,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:36:24,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:24,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:36:24,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:36:24,323 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) [2021-11-23 02:36:27,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:27,094 INFO L93 Difference]: Finished difference Result 43308 states and 70007 transitions. [2021-11-23 02:36:27,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:36:27,097 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 [2021-11-23 02:36:27,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:27,253 INFO L225 Difference]: With dead ends: 43308 [2021-11-23 02:36:27,253 INFO L226 Difference]: Without dead ends: 27321 [2021-11-23 02:36:27,314 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 [2021-11-23 02:36:27,314 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 [2021-11-23 02:36:27,315 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] [2021-11-23 02:36:27,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27321 states. [2021-11-23 02:36:29,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27321 to 25538. [2021-11-23 02:36:29,829 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) [2021-11-23 02:36:29,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25538 states to 25538 states and 40875 transitions. [2021-11-23 02:36:29,978 INFO L78 Accepts]: Start accepts. Automaton has 25538 states and 40875 transitions. Word has length 97 [2021-11-23 02:36:29,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:29,979 INFO L470 AbstractCegarLoop]: Abstraction has 25538 states and 40875 transitions. [2021-11-23 02:36:29,979 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) [2021-11-23 02:36:29,980 INFO L276 IsEmpty]: Start isEmpty. Operand 25538 states and 40875 transitions. [2021-11-23 02:36:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 02:36:29,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:29,984 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] [2021-11-23 02:36:29,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:36:29,984 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:29,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:29,985 INFO L85 PathProgramCache]: Analyzing trace with hash -938464453, now seen corresponding path program 1 times [2021-11-23 02:36:29,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:29,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891529582] [2021-11-23 02:36:29,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:29,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:36:30,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:30,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891529582] [2021-11-23 02:36:30,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891529582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:30,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:36:30,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:36:30,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140968457] [2021-11-23 02:36:30,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:30,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:36:30,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:30,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:36:30,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:36:30,093 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) [2021-11-23 02:36:34,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:34,194 INFO L93 Difference]: Finished difference Result 72202 states and 119368 transitions. [2021-11-23 02:36:34,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:36:34,194 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 [2021-11-23 02:36:34,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:34,649 INFO L225 Difference]: With dead ends: 72202 [2021-11-23 02:36:34,649 INFO L226 Difference]: Without dead ends: 46684 [2021-11-23 02:36:34,760 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 [2021-11-23 02:36:34,761 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 1129 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:34,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1198 Valid, 999 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 02:36:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46684 states. [2021-11-23 02:36:38,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46684 to 45083. [2021-11-23 02:36:38,433 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) [2021-11-23 02:36:38,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45083 states to 45083 states and 73404 transitions. [2021-11-23 02:36:38,789 INFO L78 Accepts]: Start accepts. Automaton has 45083 states and 73404 transitions. Word has length 98 [2021-11-23 02:36:38,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:38,789 INFO L470 AbstractCegarLoop]: Abstraction has 45083 states and 73404 transitions. [2021-11-23 02:36:38,790 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) [2021-11-23 02:36:38,790 INFO L276 IsEmpty]: Start isEmpty. Operand 45083 states and 73404 transitions. [2021-11-23 02:36:38,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 02:36:38,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:38,795 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] [2021-11-23 02:36:38,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:36:38,796 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:38,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:38,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1295959992, now seen corresponding path program 1 times [2021-11-23 02:36:38,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:38,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245995356] [2021-11-23 02:36:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:38,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:36:38,933 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:38,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245995356] [2021-11-23 02:36:38,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245995356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:38,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:36:38,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:36:38,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824547256] [2021-11-23 02:36:38,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:38,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:36:38,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:38,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:36:38,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:36:38,936 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) [2021-11-23 02:36:46,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:46,015 INFO L93 Difference]: Finished difference Result 131416 states and 225810 transitions. [2021-11-23 02:36:46,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:36:46,016 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 [2021-11-23 02:36:46,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:46,558 INFO L225 Difference]: With dead ends: 131416 [2021-11-23 02:36:46,559 INFO L226 Difference]: Without dead ends: 86357 [2021-11-23 02:36:46,777 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 [2021-11-23 02:36:46,778 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 1116 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:46,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1184 Valid, 1011 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 02:36:46,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86357 states. [2021-11-23 02:36:53,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86357 to 83692. [2021-11-23 02:36:53,217 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) [2021-11-23 02:36:53,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83692 states to 83692 states and 140361 transitions. [2021-11-23 02:36:53,705 INFO L78 Accepts]: Start accepts. Automaton has 83692 states and 140361 transitions. Word has length 98 [2021-11-23 02:36:53,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:53,706 INFO L470 AbstractCegarLoop]: Abstraction has 83692 states and 140361 transitions. [2021-11-23 02:36:53,706 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) [2021-11-23 02:36:53,706 INFO L276 IsEmpty]: Start isEmpty. Operand 83692 states and 140361 transitions. [2021-11-23 02:36:53,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 02:36:53,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:53,711 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] [2021-11-23 02:36:53,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:36:53,711 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:53,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:53,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1519923665, now seen corresponding path program 1 times [2021-11-23 02:36:53,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:53,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477800135] [2021-11-23 02:36:53,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:53,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:36:53,822 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:53,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477800135] [2021-11-23 02:36:53,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477800135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:53,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:36:53,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:36:53,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241280991] [2021-11-23 02:36:53,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:53,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:36:53,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:53,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:36:53,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:36:53,825 INFO L87 Difference]: Start difference. First operand 83692 states and 140361 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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)