./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fed3439a-8812-42bc-b102-4844e85c5e85/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fed3439a-8812-42bc-b102-4844e85c5e85/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fed3439a-8812-42bc-b102-4844e85c5e85/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fed3439a-8812-42bc-b102-4844e85c5e85/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fed3439a-8812-42bc-b102-4844e85c5e85/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fed3439a-8812-42bc-b102-4844e85c5e85/bin/utaipan-aC7eJsxGYH --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 16e0086acf2f158eb0b3309fc7ab7b15830d1af8d2ef9923a4f4e2311d9d7a3f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:15:48,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:15:48,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:15:48,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:15:48,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:15:48,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:15:48,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:15:48,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:15:48,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:15:48,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:15:48,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:15:48,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:15:48,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:15:48,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:15:48,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:15:48,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:15:48,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:15:48,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:15:48,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:15:48,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:15:48,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:15:48,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:15:48,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:15:48,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:15:48,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:15:48,348 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:15:48,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:15:48,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:15:48,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:15:48,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:15:48,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:15:48,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:15:48,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:15:48,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:15:48,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:15:48,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:15:48,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:15:48,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:15:48,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:15:48,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:15:48,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:15:48,361 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fed3439a-8812-42bc-b102-4844e85c5e85/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:15:48,385 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:15:48,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:15:48,387 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:15:48,387 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:15:48,387 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:15:48,388 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:15:48,388 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:15:48,388 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:15:48,388 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:15:48,389 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:15:48,389 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:15:48,389 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:15:48,389 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:15:48,390 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:15:48,390 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:15:48,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:15:48,391 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:15:48,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:15:48,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:15:48,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:15:48,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:15:48,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:15:48,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:15:48,393 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:15:48,393 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:15:48,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:15:48,394 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:15:48,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:15:48,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:15:48,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:15:48,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:15:48,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:15:48,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:15:48,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:15:48,396 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:15:48,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:15:48,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:15:48,397 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:15:48,397 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:15:48,398 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_fed3439a-8812-42bc-b102-4844e85c5e85/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fed3439a-8812-42bc-b102-4844e85c5e85/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16e0086acf2f158eb0b3309fc7ab7b15830d1af8d2ef9923a4f4e2311d9d7a3f [2021-11-03 05:15:48,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:15:48,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:15:48,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:15:48,659 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:15:48,659 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:15:48,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fed3439a-8812-42bc-b102-4844e85c5e85/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.ufo.UNBOUNDED.pals.c [2021-11-03 05:15:48,748 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fed3439a-8812-42bc-b102-4844e85c5e85/bin/utaipan-aC7eJsxGYH/data/7b70c2a58/1fe4368c4acd4097a9049adb630eec14/FLAGff3fb219d [2021-11-03 05:15:49,394 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:15:49,395 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fed3439a-8812-42bc-b102-4844e85c5e85/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.ufo.UNBOUNDED.pals.c [2021-11-03 05:15:49,416 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fed3439a-8812-42bc-b102-4844e85c5e85/bin/utaipan-aC7eJsxGYH/data/7b70c2a58/1fe4368c4acd4097a9049adb630eec14/FLAGff3fb219d [2021-11-03 05:15:49,606 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fed3439a-8812-42bc-b102-4844e85c5e85/bin/utaipan-aC7eJsxGYH/data/7b70c2a58/1fe4368c4acd4097a9049adb630eec14 [2021-11-03 05:15:49,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:15:49,616 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:15:49,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:15:49,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:15:49,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:15:49,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:15:49" (1/1) ... [2021-11-03 05:15:49,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17c4cfdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:49, skipping insertion in model container [2021-11-03 05:15:49,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:15:49" (1/1) ... [2021-11-03 05:15:49,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:15:49,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:15:50,155 WARN L228 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_fed3439a-8812-42bc-b102-4844e85c5e85/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.ufo.UNBOUNDED.pals.c[65677,65690] [2021-11-03 05:15:50,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:15:50,172 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:15:50,338 WARN L228 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_fed3439a-8812-42bc-b102-4844e85c5e85/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.ufo.UNBOUNDED.pals.c[65677,65690] [2021-11-03 05:15:50,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:15:50,356 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:15:50,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:50 WrapperNode [2021-11-03 05:15:50,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:15:50,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:15:50,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:15:50,358 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:15:50,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:50" (1/1) ... [2021-11-03 05:15:50,398 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:50" (1/1) ... [2021-11-03 05:15:50,486 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:15:50,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:15:50,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:15:50,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:15:50,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:50" (1/1) ... [2021-11-03 05:15:50,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:50" (1/1) ... [2021-11-03 05:15:50,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:50" (1/1) ... [2021-11-03 05:15:50,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:50" (1/1) ... [2021-11-03 05:15:50,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:50" (1/1) ... [2021-11-03 05:15:50,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:50" (1/1) ... [2021-11-03 05:15:50,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:50" (1/1) ... [2021-11-03 05:15:50,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:15:50,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:15:50,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:15:50,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:15:50,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:50" (1/1) ... [2021-11-03 05:15:50,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:15:50,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fed3439a-8812-42bc-b102-4844e85c5e85/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:15:50,698 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fed3439a-8812-42bc-b102-4844e85c5e85/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:15:50,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fed3439a-8812-42bc-b102-4844e85c5e85/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:15:50,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:15:50,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:15:50,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:15:50,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:15:59,020 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:15:59,021 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-11-03 05:15:59,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:15:59 BoogieIcfgContainer [2021-11-03 05:15:59,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:15:59,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:15:59,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:15:59,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:15:59,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:15:49" (1/3) ... [2021-11-03 05:15:59,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1a2cfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:15:59, skipping insertion in model container [2021-11-03 05:15:59,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:50" (2/3) ... [2021-11-03 05:15:59,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1a2cfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:15:59, skipping insertion in model container [2021-11-03 05:15:59,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:15:59" (3/3) ... [2021-11-03 05:15:59,042 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.ufo.UNBOUNDED.pals.c [2021-11-03 05:15:59,047 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:15:59,047 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:15:59,120 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:15:59,126 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 [2021-11-03 05:15:59,126 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:15:59,160 INFO L276 IsEmpty]: Start isEmpty. Operand has 440 states, 438 states have (on average 1.7191780821917808) internal successors, (753), 439 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:15:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-03 05:15:59,196 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:15:59,196 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:15:59,197 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:15:59,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:15:59,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2102645795, now seen corresponding path program 1 times [2021-11-03 05:15:59,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:15:59,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907545099] [2021-11-03 05:15:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:15:59,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:16:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:02,063 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:16:02,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907545099] [2021-11-03 05:16:02,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907545099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:02,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:02,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:16:02,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365429014] [2021-11-03 05:16:02,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:16:02,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:16:02,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:16:02,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:16:02,100 INFO L87 Difference]: Start difference. First operand has 440 states, 438 states have (on average 1.7191780821917808) internal successors, (753), 439 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:02,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:02,380 INFO L93 Difference]: Finished difference Result 477 states and 819 transitions. [2021-11-03 05:16:02,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:16:02,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-03 05:16:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:02,406 INFO L225 Difference]: With dead ends: 477 [2021-11-03 05:16:02,408 INFO L226 Difference]: Without dead ends: 458 [2021-11-03 05:16:02,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:16:02,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-03 05:16:02,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 449. [2021-11-03 05:16:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.7142857142857142) internal successors, (768), 448 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:02,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 768 transitions. [2021-11-03 05:16:02,486 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 768 transitions. Word has length 126 [2021-11-03 05:16:02,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:02,487 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 768 transitions. [2021-11-03 05:16:02,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:02,487 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 768 transitions. [2021-11-03 05:16:02,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-03 05:16:02,494 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:02,494 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:02,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:16:02,495 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:16:02,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:02,496 INFO L85 PathProgramCache]: Analyzing trace with hash -831166134, now seen corresponding path program 1 times [2021-11-03 05:16:02,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:16:02,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527098465] [2021-11-03 05:16:02,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:02,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:16:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:04,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:16:04,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527098465] [2021-11-03 05:16:04,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527098465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:04,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:04,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:16:04,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578865703] [2021-11-03 05:16:04,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:16:04,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:16:04,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:16:04,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:16:04,228 INFO L87 Difference]: Start difference. First operand 449 states and 768 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:04,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:04,396 INFO L93 Difference]: Finished difference Result 480 states and 816 transitions. [2021-11-03 05:16:04,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:16:04,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-03 05:16:04,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:04,402 INFO L225 Difference]: With dead ends: 480 [2021-11-03 05:16:04,402 INFO L226 Difference]: Without dead ends: 460 [2021-11-03 05:16:04,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:16:04,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-03 05:16:04,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 449. [2021-11-03 05:16:04,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.7120535714285714) internal successors, (767), 448 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:04,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 767 transitions. [2021-11-03 05:16:04,455 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 767 transitions. Word has length 127 [2021-11-03 05:16:04,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:04,456 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 767 transitions. [2021-11-03 05:16:04,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:04,456 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 767 transitions. [2021-11-03 05:16:04,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-03 05:16:04,460 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:04,461 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:04,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:16:04,461 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:16:04,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:04,462 INFO L85 PathProgramCache]: Analyzing trace with hash -64550554, now seen corresponding path program 1 times [2021-11-03 05:16:04,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:16:04,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060942989] [2021-11-03 05:16:04,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:04,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:16:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:05,644 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:16:05,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060942989] [2021-11-03 05:16:05,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060942989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:05,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:05,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:16:05,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115114211] [2021-11-03 05:16:05,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:16:05,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:16:05,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:16:05,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:16:05,657 INFO L87 Difference]: Start difference. First operand 449 states and 767 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:05,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:05,848 INFO L93 Difference]: Finished difference Result 480 states and 815 transitions. [2021-11-03 05:16:05,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:16:05,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-03 05:16:05,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:05,853 INFO L225 Difference]: With dead ends: 480 [2021-11-03 05:16:05,853 INFO L226 Difference]: Without dead ends: 460 [2021-11-03 05:16:05,854 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:16:05,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-03 05:16:05,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 449. [2021-11-03 05:16:05,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.7098214285714286) internal successors, (766), 448 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:05,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 766 transitions. [2021-11-03 05:16:05,872 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 766 transitions. Word has length 128 [2021-11-03 05:16:05,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:05,872 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 766 transitions. [2021-11-03 05:16:05,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:05,873 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 766 transitions. [2021-11-03 05:16:05,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-03 05:16:05,875 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:05,876 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:05,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 05:16:05,876 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:16:05,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:05,877 INFO L85 PathProgramCache]: Analyzing trace with hash -2063819597, now seen corresponding path program 1 times [2021-11-03 05:16:05,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:16:05,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3607855] [2021-11-03 05:16:05,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:05,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:16:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:06,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:16:06,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3607855] [2021-11-03 05:16:06,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3607855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:06,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:06,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:16:06,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628352928] [2021-11-03 05:16:06,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:16:06,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:16:06,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:16:06,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:16:06,998 INFO L87 Difference]: Start difference. First operand 449 states and 766 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:07,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:07,166 INFO L93 Difference]: Finished difference Result 480 states and 814 transitions. [2021-11-03 05:16:07,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:16:07,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-11-03 05:16:07,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:07,170 INFO L225 Difference]: With dead ends: 480 [2021-11-03 05:16:07,171 INFO L226 Difference]: Without dead ends: 460 [2021-11-03 05:16:07,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:16:07,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-03 05:16:07,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 449. [2021-11-03 05:16:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.7075892857142858) internal successors, (765), 448 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:07,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 765 transitions. [2021-11-03 05:16:07,187 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 765 transitions. Word has length 129 [2021-11-03 05:16:07,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:07,187 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 765 transitions. [2021-11-03 05:16:07,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:07,188 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 765 transitions. [2021-11-03 05:16:07,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-03 05:16:07,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:07,190 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:07,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 05:16:07,191 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:16:07,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:07,191 INFO L85 PathProgramCache]: Analyzing trace with hash 388801263, now seen corresponding path program 1 times [2021-11-03 05:16:07,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:16:07,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034415062] [2021-11-03 05:16:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:07,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:16:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:08,130 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:16:08,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034415062] [2021-11-03 05:16:08,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034415062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:08,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:08,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:16:08,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635609679] [2021-11-03 05:16:08,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:16:08,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:16:08,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:16:08,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:16:08,133 INFO L87 Difference]: Start difference. First operand 449 states and 765 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:08,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:08,268 INFO L93 Difference]: Finished difference Result 480 states and 813 transitions. [2021-11-03 05:16:08,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:16:08,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-03 05:16:08,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:08,272 INFO L225 Difference]: With dead ends: 480 [2021-11-03 05:16:08,272 INFO L226 Difference]: Without dead ends: 460 [2021-11-03 05:16:08,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:16:08,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-03 05:16:08,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 449. [2021-11-03 05:16:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.7053571428571428) internal successors, (764), 448 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:08,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 764 transitions. [2021-11-03 05:16:08,287 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 764 transitions. Word has length 130 [2021-11-03 05:16:08,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:08,288 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 764 transitions. [2021-11-03 05:16:08,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:08,288 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 764 transitions. [2021-11-03 05:16:08,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-03 05:16:08,290 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:08,291 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:08,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 05:16:08,291 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:16:08,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:08,291 INFO L85 PathProgramCache]: Analyzing trace with hash -883911652, now seen corresponding path program 1 times [2021-11-03 05:16:08,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:16:08,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670893487] [2021-11-03 05:16:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:08,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:16:09,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:09,236 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:16:09,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670893487] [2021-11-03 05:16:09,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670893487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:09,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:09,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:16:09,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376646683] [2021-11-03 05:16:09,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:16:09,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:16:09,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:16:09,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:16:09,241 INFO L87 Difference]: Start difference. First operand 449 states and 764 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:09,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:09,417 INFO L93 Difference]: Finished difference Result 480 states and 812 transitions. [2021-11-03 05:16:09,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:16:09,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-03 05:16:09,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:09,421 INFO L225 Difference]: With dead ends: 480 [2021-11-03 05:16:09,421 INFO L226 Difference]: Without dead ends: 460 [2021-11-03 05:16:09,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:16:09,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-03 05:16:09,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 449. [2021-11-03 05:16:09,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.703125) internal successors, (763), 448 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:09,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 763 transitions. [2021-11-03 05:16:09,440 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 763 transitions. Word has length 131 [2021-11-03 05:16:09,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:09,440 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 763 transitions. [2021-11-03 05:16:09,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:09,441 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 763 transitions. [2021-11-03 05:16:09,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-03 05:16:09,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:09,443 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:09,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 05:16:09,444 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:16:09,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:09,445 INFO L85 PathProgramCache]: Analyzing trace with hash -512894044, now seen corresponding path program 1 times [2021-11-03 05:16:09,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:16:09,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184221875] [2021-11-03 05:16:09,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:09,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:16:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:10,404 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:16:10,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184221875] [2021-11-03 05:16:10,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184221875] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:10,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:10,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:16:10,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256635835] [2021-11-03 05:16:10,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:16:10,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:16:10,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:16:10,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:16:10,406 INFO L87 Difference]: Start difference. First operand 449 states and 763 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:10,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:10,550 INFO L93 Difference]: Finished difference Result 478 states and 808 transitions. [2021-11-03 05:16:10,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:16:10,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-03 05:16:10,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:10,555 INFO L225 Difference]: With dead ends: 478 [2021-11-03 05:16:10,555 INFO L226 Difference]: Without dead ends: 458 [2021-11-03 05:16:10,555 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:16:10,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-03 05:16:10,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 450. [2021-11-03 05:16:10,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7015590200445434) internal successors, (764), 449 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 764 transitions. [2021-11-03 05:16:10,570 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 764 transitions. Word has length 133 [2021-11-03 05:16:10,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:10,570 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 764 transitions. [2021-11-03 05:16:10,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:10,571 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 764 transitions. [2021-11-03 05:16:10,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 05:16:10,573 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:10,573 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:10,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 05:16:10,573 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:16:10,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:10,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1192108838, now seen corresponding path program 1 times [2021-11-03 05:16:10,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:16:10,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912571694] [2021-11-03 05:16:10,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:10,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:16:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:11,470 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:16:11,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912571694] [2021-11-03 05:16:11,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912571694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:11,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:11,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:16:11,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282980727] [2021-11-03 05:16:11,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:16:11,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:16:11,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:16:11,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:16:11,473 INFO L87 Difference]: Start difference. First operand 450 states and 764 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:11,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:11,605 INFO L93 Difference]: Finished difference Result 479 states and 809 transitions. [2021-11-03 05:16:11,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:16:11,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-03 05:16:11,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:11,609 INFO L225 Difference]: With dead ends: 479 [2021-11-03 05:16:11,609 INFO L226 Difference]: Without dead ends: 459 [2021-11-03 05:16:11,610 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:16:11,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-11-03 05:16:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 452. [2021-11-03 05:16:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.6962305986696231) internal successors, (765), 451 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 765 transitions. [2021-11-03 05:16:11,625 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 765 transitions. Word has length 134 [2021-11-03 05:16:11,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:11,625 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 765 transitions. [2021-11-03 05:16:11,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:11,626 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 765 transitions. [2021-11-03 05:16:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-03 05:16:11,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:11,629 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:11,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 05:16:11,629 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:16:11,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:11,630 INFO L85 PathProgramCache]: Analyzing trace with hash 370339436, now seen corresponding path program 1 times [2021-11-03 05:16:11,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:16:11,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865437799] [2021-11-03 05:16:11,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:11,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:16:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:12,575 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:16:12,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865437799] [2021-11-03 05:16:12,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865437799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:12,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:12,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:16:12,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526251466] [2021-11-03 05:16:12,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:16:12,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:16:12,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:16:12,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:16:12,582 INFO L87 Difference]: Start difference. First operand 452 states and 765 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:12,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:12,772 INFO L93 Difference]: Finished difference Result 479 states and 806 transitions. [2021-11-03 05:16:12,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:16:12,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-03 05:16:12,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:12,776 INFO L225 Difference]: With dead ends: 479 [2021-11-03 05:16:12,776 INFO L226 Difference]: Without dead ends: 459 [2021-11-03 05:16:12,777 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:16:12,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-11-03 05:16:12,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 453. [2021-11-03 05:16:12,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.6946902654867257) internal successors, (766), 452 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:12,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 766 transitions. [2021-11-03 05:16:12,793 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 766 transitions. Word has length 136 [2021-11-03 05:16:12,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:12,794 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 766 transitions. [2021-11-03 05:16:12,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:12,794 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 766 transitions. [2021-11-03 05:16:12,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-03 05:16:12,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:12,797 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:12,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 05:16:12,797 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:16:12,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:12,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1408681853, now seen corresponding path program 1 times [2021-11-03 05:16:12,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:16:12,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875836634] [2021-11-03 05:16:12,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:12,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:16:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:13,105 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:16:13,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875836634] [2021-11-03 05:16:13,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875836634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:13,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:13,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 05:16:13,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663494139] [2021-11-03 05:16:13,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:16:13,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:16:13,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:16:13,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:16:13,108 INFO L87 Difference]: Start difference. First operand 453 states and 766 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:13,397 INFO L93 Difference]: Finished difference Result 501 states and 843 transitions. [2021-11-03 05:16:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:16:13,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-03 05:16:13,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:13,402 INFO L225 Difference]: With dead ends: 501 [2021-11-03 05:16:13,402 INFO L226 Difference]: Without dead ends: 481 [2021-11-03 05:16:13,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:16:13,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-11-03 05:16:13,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 456. [2021-11-03 05:16:13,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.687912087912088) internal successors, (768), 455 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:13,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 768 transitions. [2021-11-03 05:16:13,424 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 768 transitions. Word has length 137 [2021-11-03 05:16:13,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:13,424 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 768 transitions. [2021-11-03 05:16:13,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:13,425 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 768 transitions. [2021-11-03 05:16:13,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-03 05:16:13,428 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:13,428 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:13,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 05:16:13,429 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:16:13,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:13,429 INFO L85 PathProgramCache]: Analyzing trace with hash -837242229, now seen corresponding path program 1 times [2021-11-03 05:16:13,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:16:13,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297182435] [2021-11-03 05:16:13,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:13,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:16:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:17,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:16:17,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297182435] [2021-11-03 05:16:17,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297182435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:16:17,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231390217] [2021-11-03 05:16:17,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:17,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:16:17,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fed3439a-8812-42bc-b102-4844e85c5e85/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:16:17,293 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fed3439a-8812-42bc-b102-4844e85c5e85/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:16:17,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fed3439a-8812-42bc-b102-4844e85c5e85/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 05:16:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:17,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-03 05:16:17,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:56,836 WARN L207 SmtUtils]: Spent 5.31 s on a formula simplification that was a NOOP. DAG size: 527 [2021-11-03 05:21:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:21:24,854 INFO L328 TraceCheckSpWp]: Computing backward predicates...