./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.12.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28e2d8bd-2280-4ff0-b6f6-d8b1063aa2ca/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28e2d8bd-2280-4ff0-b6f6-d8b1063aa2ca/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28e2d8bd-2280-4ff0-b6f6-d8b1063aa2ca/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28e2d8bd-2280-4ff0-b6f6-d8b1063aa2ca/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.12.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28e2d8bd-2280-4ff0-b6f6-d8b1063aa2ca/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28e2d8bd-2280-4ff0-b6f6-d8b1063aa2ca/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 062c7418109a213aa13d25a99437d8241cca4f6492c123259890838dc94aff90 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:13:48,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:13:48,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:13:48,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:13:48,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:13:48,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:13:48,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:13:48,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:13:48,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:13:48,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:13:48,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:13:48,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:13:48,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:13:48,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:13:48,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:13:48,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:13:48,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:13:48,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:13:48,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:13:48,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:13:48,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:13:48,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:13:48,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:13:48,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:13:48,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:13:48,634 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:13:48,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:13:48,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:13:48,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:13:48,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:13:48,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:13:48,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:13:48,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:13:48,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:13:48,643 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:13:48,643 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:13:48,644 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:13:48,644 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:13:48,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:13:48,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:13:48,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:13:48,648 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28e2d8bd-2280-4ff0-b6f6-d8b1063aa2ca/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:13:48,695 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:13:48,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:13:48,699 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:13:48,700 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:13:48,701 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:13:48,707 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:13:48,708 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:13:48,708 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:13:48,708 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:13:48,708 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:13:48,710 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:13:48,710 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:13:48,710 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:13:48,710 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:13:48,711 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:13:48,711 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:13:48,711 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:13:48,711 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:13:48,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:13:48,712 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:13:48,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:13:48,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:13:48,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:13:48,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:13:48,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:13:48,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:13:48,715 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:13:48,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:13:48,716 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:13:48,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:13:48,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:13:48,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:13:48,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:13:48,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:13:48,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:13:48,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:13:48,718 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:13:48,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:13:48,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:13:48,719 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:13:48,719 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:13:48,719 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_28e2d8bd-2280-4ff0-b6f6-d8b1063aa2ca/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28e2d8bd-2280-4ff0-b6f6-d8b1063aa2ca/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 062c7418109a213aa13d25a99437d8241cca4f6492c123259890838dc94aff90 [2021-11-21 01:13:49,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:13:49,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:13:49,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:13:49,048 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:13:49,049 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:13:49,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28e2d8bd-2280-4ff0-b6f6-d8b1063aa2ca/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/systemc/transmitter.12.cil.c [2021-11-21 01:13:49,116 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28e2d8bd-2280-4ff0-b6f6-d8b1063aa2ca/bin/utaipan-TEXQjIfE4P/data/ea0da0fa6/41df07addd154dc090485c96d1d97326/FLAGc137f9dfa [2021-11-21 01:13:49,776 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:13:49,776 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28e2d8bd-2280-4ff0-b6f6-d8b1063aa2ca/sv-benchmarks/c/systemc/transmitter.12.cil.c [2021-11-21 01:13:49,799 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28e2d8bd-2280-4ff0-b6f6-d8b1063aa2ca/bin/utaipan-TEXQjIfE4P/data/ea0da0fa6/41df07addd154dc090485c96d1d97326/FLAGc137f9dfa [2021-11-21 01:13:50,055 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28e2d8bd-2280-4ff0-b6f6-d8b1063aa2ca/bin/utaipan-TEXQjIfE4P/data/ea0da0fa6/41df07addd154dc090485c96d1d97326 [2021-11-21 01:13:50,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:13:50,059 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:13:50,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:13:50,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:13:50,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:13:50,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:13:50" (1/1) ... [2021-11-21 01:13:50,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@113e6d1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:13:50, skipping insertion in model container [2021-11-21 01:13:50,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:13:50" (1/1) ... [2021-11-21 01:13:50,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:13:50,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:13:50,351 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28e2d8bd-2280-4ff0-b6f6-d8b1063aa2ca/sv-benchmarks/c/systemc/transmitter.12.cil.c[706,719] [2021-11-21 01:13:50,554 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:13:50,565 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:13:50,576 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28e2d8bd-2280-4ff0-b6f6-d8b1063aa2ca/sv-benchmarks/c/systemc/transmitter.12.cil.c[706,719] [2021-11-21 01:13:50,658 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:13:50,692 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:13:50,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:13:50 WrapperNode [2021-11-21 01:13:50,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:13:50,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:13:50,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:13:50,696 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:13:50,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:13:50" (1/1) ... [2021-11-21 01:13:50,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:13:50" (1/1) ... [2021-11-21 01:13:50,812 INFO L137 Inliner]: procedures = 52, calls = 66, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 834 [2021-11-21 01:13:50,812 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:13:50,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:13:50,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:13:50,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:13:50,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:13:50" (1/1) ... [2021-11-21 01:13:50,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:13:50" (1/1) ... [2021-11-21 01:13:50,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:13:50" (1/1) ... [2021-11-21 01:13:50,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:13:50" (1/1) ... [2021-11-21 01:13:50,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:13:50" (1/1) ... [2021-11-21 01:13:50,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:13:50" (1/1) ... [2021-11-21 01:13:50,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:13:50" (1/1) ... [2021-11-21 01:13:50,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:13:50,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:13:50,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:13:50,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:13:50,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:13:50" (1/1) ... [2021-11-21 01:13:50,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:13:50,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28e2d8bd-2280-4ff0-b6f6-d8b1063aa2ca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:13:50,956 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28e2d8bd-2280-4ff0-b6f6-d8b1063aa2ca/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:13:50,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28e2d8bd-2280-4ff0-b6f6-d8b1063aa2ca/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:13:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:13:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-21 01:13:51,005 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-21 01:13:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-21 01:13:51,005 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-21 01:13:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-21 01:13:51,005 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-21 01:13:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-21 01:13:51,006 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-21 01:13:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-21 01:13:51,006 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-21 01:13:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-21 01:13:51,006 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-21 01:13:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:13:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:13:51,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:13:51,178 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:13:51,180 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:13:52,055 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:13:52,588 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:13:52,588 INFO L301 CfgBuilder]: Removed 16 assume(true) statements. [2021-11-21 01:13:52,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:13:52 BoogieIcfgContainer [2021-11-21 01:13:52,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:13:52,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:13:52,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:13:52,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:13:52,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:13:50" (1/3) ... [2021-11-21 01:13:52,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36bbb63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:13:52, skipping insertion in model container [2021-11-21 01:13:52,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:13:50" (2/3) ... [2021-11-21 01:13:52,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36bbb63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:13:52, skipping insertion in model container [2021-11-21 01:13:52,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:13:52" (3/3) ... [2021-11-21 01:13:52,601 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.12.cil.c [2021-11-21 01:13:52,607 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:13:52,607 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:13:52,678 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:13:52,686 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:13:52,687 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:13:52,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 155 states have internal predecessors, (239), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-21 01:13:52,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-21 01:13:52,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:13:52,741 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:13:52,742 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:13:52,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:13:52,748 INFO L85 PathProgramCache]: Analyzing trace with hash 2024217964, now seen corresponding path program 1 times [2021-11-21 01:13:52,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:13:52,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692094511] [2021-11-21 01:13:52,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:13:52,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:13:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:13:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:13:53,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:13:53,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692094511] [2021-11-21 01:13:53,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692094511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:13:53,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:13:53,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:13:53,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486769911] [2021-11-21 01:13:53,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:13:53,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:13:53,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:13:53,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:13:53,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:13:53,268 INFO L87 Difference]: Start difference. First operand has 186 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 155 states have internal predecessors, (239), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:13:53,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:13:53,845 INFO L93 Difference]: Finished difference Result 545 states and 862 transitions. [2021-11-21 01:13:53,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:13:53,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2021-11-21 01:13:53,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:13:53,861 INFO L225 Difference]: With dead ends: 545 [2021-11-21 01:13:53,862 INFO L226 Difference]: Without dead ends: 360 [2021-11-21 01:13:53,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:13:53,872 INFO L933 BasicCegarLoop]: 447 mSDtfsCounter, 507 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:13:53,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 802 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:13:53,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-21 01:13:53,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 356. [2021-11-21 01:13:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 297 states have (on average 1.5252525252525253) internal successors, (453), 299 states have internal predecessors, (453), 46 states have call successors, (46), 12 states have call predecessors, (46), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-21 01:13:53,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 545 transitions. [2021-11-21 01:13:53,954 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 545 transitions. Word has length 77 [2021-11-21 01:13:53,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:13:53,956 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 545 transitions. [2021-11-21 01:13:53,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:13:53,957 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 545 transitions. [2021-11-21 01:13:53,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-21 01:13:53,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:13:53,961 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:13:53,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:13:53,961 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:13:53,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:13:53,962 INFO L85 PathProgramCache]: Analyzing trace with hash -133255059, now seen corresponding path program 1 times [2021-11-21 01:13:53,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:13:53,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695008097] [2021-11-21 01:13:53,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:13:53,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:13:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:13:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:13:54,099 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:13:54,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695008097] [2021-11-21 01:13:54,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695008097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:13:54,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:13:54,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:13:54,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559962701] [2021-11-21 01:13:54,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:13:54,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:13:54,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:13:54,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:13:54,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:13:54,107 INFO L87 Difference]: Start difference. First operand 356 states and 545 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:13:55,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:13:55,103 INFO L93 Difference]: Finished difference Result 2077 states and 3363 transitions. [2021-11-21 01:13:55,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:13:55,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2021-11-21 01:13:55,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:13:55,123 INFO L225 Difference]: With dead ends: 2077 [2021-11-21 01:13:55,123 INFO L226 Difference]: Without dead ends: 1726 [2021-11-21 01:13:55,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:13:55,131 INFO L933 BasicCegarLoop]: 612 mSDtfsCounter, 1199 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1226 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:13:55,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1226 Valid, 1295 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 01:13:55,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2021-11-21 01:13:55,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1690. [2021-11-21 01:13:55,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1427 states have (on average 1.5227750525578136) internal successors, (2173), 1435 states have internal predecessors, (2173), 202 states have call successors, (202), 60 states have call predecessors, (202), 60 states have return successors, (316), 195 states have call predecessors, (316), 202 states have call successors, (316) [2021-11-21 01:13:55,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2691 transitions. [2021-11-21 01:13:55,314 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2691 transitions. Word has length 77 [2021-11-21 01:13:55,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:13:55,315 INFO L470 AbstractCegarLoop]: Abstraction has 1690 states and 2691 transitions. [2021-11-21 01:13:55,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:13:55,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2691 transitions. [2021-11-21 01:13:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-21 01:13:55,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:13:55,327 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:13:55,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:13:55,328 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:13:55,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:13:55,328 INFO L85 PathProgramCache]: Analyzing trace with hash 895277102, now seen corresponding path program 1 times [2021-11-21 01:13:55,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:13:55,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828181964] [2021-11-21 01:13:55,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:13:55,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:13:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:13:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:13:55,456 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:13:55,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828181964] [2021-11-21 01:13:55,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828181964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:13:55,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:13:55,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:13:55,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571625036] [2021-11-21 01:13:55,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:13:55,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:13:55,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:13:55,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:13:55,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:13:55,459 INFO L87 Difference]: Start difference. First operand 1690 states and 2691 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:13:56,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:13:56,535 INFO L93 Difference]: Finished difference Result 6683 states and 10977 transitions. [2021-11-21 01:13:56,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:13:56,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2021-11-21 01:13:56,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:13:56,586 INFO L225 Difference]: With dead ends: 6683 [2021-11-21 01:13:56,587 INFO L226 Difference]: Without dead ends: 4998 [2021-11-21 01:13:56,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:13:56,607 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 1203 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:13:56,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1209 Valid, 1319 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 01:13:56,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4998 states. [2021-11-21 01:13:56,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4998 to 4704. [2021-11-21 01:13:57,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4704 states, 4075 states have (on average 1.5334969325153374) internal successors, (6249), 4017 states have internal predecessors, (6249), 464 states have call successors, (464), 148 states have call predecessors, (464), 164 states have return successors, (958), 539 states have call predecessors, (958), 464 states have call successors, (958) [2021-11-21 01:13:57,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4704 states to 4704 states and 7671 transitions. [2021-11-21 01:13:57,068 INFO L78 Accepts]: Start accepts. Automaton has 4704 states and 7671 transitions. Word has length 77 [2021-11-21 01:13:57,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:13:57,070 INFO L470 AbstractCegarLoop]: Abstraction has 4704 states and 7671 transitions. [2021-11-21 01:13:57,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:13:57,071 INFO L276 IsEmpty]: Start isEmpty. Operand 4704 states and 7671 transitions. [2021-11-21 01:13:57,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-21 01:13:57,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:13:57,077 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:13:57,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:13:57,078 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:13:57,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:13:57,079 INFO L85 PathProgramCache]: Analyzing trace with hash -246370291, now seen corresponding path program 1 times [2021-11-21 01:13:57,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:13:57,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472719883] [2021-11-21 01:13:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:13:57,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:13:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:13:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:13:57,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:13:57,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472719883] [2021-11-21 01:13:57,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472719883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:13:57,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:13:57,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:13:57,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057712352] [2021-11-21 01:13:57,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:13:57,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:13:57,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:13:57,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:13:57,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:13:57,224 INFO L87 Difference]: Start difference. First operand 4704 states and 7671 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:13:58,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:13:58,559 INFO L93 Difference]: Finished difference Result 17415 states and 29463 transitions. [2021-11-21 01:13:58,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:13:58,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2021-11-21 01:13:58,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:13:58,691 INFO L225 Difference]: With dead ends: 17415 [2021-11-21 01:13:58,691 INFO L226 Difference]: Without dead ends: 12716 [2021-11-21 01:13:58,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:13:58,762 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 1198 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:13:58,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1216 Valid, 1305 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:13:58,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12716 states. [2021-11-21 01:13:59,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12716 to 12048. [2021-11-21 01:13:59,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12048 states, 10597 states have (on average 1.543172596017741) internal successors, (16353), 10317 states have internal predecessors, (16353), 1030 states have call successors, (1030), 348 states have call predecessors, (1030), 420 states have return successors, (2738), 1383 states have call predecessors, (2738), 1030 states have call successors, (2738) [2021-11-21 01:13:59,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12048 states to 12048 states and 20121 transitions. [2021-11-21 01:13:59,658 INFO L78 Accepts]: Start accepts. Automaton has 12048 states and 20121 transitions. Word has length 77 [2021-11-21 01:13:59,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:13:59,658 INFO L470 AbstractCegarLoop]: Abstraction has 12048 states and 20121 transitions. [2021-11-21 01:13:59,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:13:59,659 INFO L276 IsEmpty]: Start isEmpty. Operand 12048 states and 20121 transitions. [2021-11-21 01:13:59,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-21 01:13:59,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:13:59,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:13:59,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:13:59,662 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:13:59,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:13:59,663 INFO L85 PathProgramCache]: Analyzing trace with hash -947938516, now seen corresponding path program 1 times [2021-11-21 01:13:59,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:13:59,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557723304] [2021-11-21 01:13:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:13:59,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:13:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:13:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:13:59,752 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:13:59,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557723304] [2021-11-21 01:13:59,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557723304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:13:59,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:13:59,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:13:59,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175165078] [2021-11-21 01:13:59,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:13:59,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:13:59,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:13:59,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:13:59,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:13:59,759 INFO L87 Difference]: Start difference. First operand 12048 states and 20121 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:14:01,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:01,911 INFO L93 Difference]: Finished difference Result 43847 states and 76605 transitions. [2021-11-21 01:14:01,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:14:01,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2021-11-21 01:14:01,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:02,278 INFO L225 Difference]: With dead ends: 43847 [2021-11-21 01:14:02,279 INFO L226 Difference]: Without dead ends: 31804 [2021-11-21 01:14:02,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:14:02,368 INFO L933 BasicCegarLoop]: 634 mSDtfsCounter, 1193 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:02,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1212 Valid, 1302 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:14:02,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31804 states. [2021-11-21 01:14:04,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31804 to 30384. [2021-11-21 01:14:04,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30384 states, 27015 states have (on average 1.5541365907828983) internal successors, (41985), 26037 states have internal predecessors, (41985), 2292 states have call successors, (2292), 820 states have call predecessors, (2292), 1076 states have return successors, (7766), 3527 states have call predecessors, (7766), 2292 states have call successors, (7766) [2021-11-21 01:14:04,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30384 states to 30384 states and 52043 transitions. [2021-11-21 01:14:04,748 INFO L78 Accepts]: Start accepts. Automaton has 30384 states and 52043 transitions. Word has length 77 [2021-11-21 01:14:04,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:04,748 INFO L470 AbstractCegarLoop]: Abstraction has 30384 states and 52043 transitions. [2021-11-21 01:14:04,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:14:04,750 INFO L276 IsEmpty]: Start isEmpty. Operand 30384 states and 52043 transitions. [2021-11-21 01:14:04,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-21 01:14:04,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:04,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:14:04,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:14:04,753 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:04,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:04,754 INFO L85 PathProgramCache]: Analyzing trace with hash 2039024011, now seen corresponding path program 1 times [2021-11-21 01:14:04,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:04,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426938989] [2021-11-21 01:14:04,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:04,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:04,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:04,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426938989] [2021-11-21 01:14:04,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426938989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:04,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:04,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:14:04,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653374177] [2021-11-21 01:14:04,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:04,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:14:04,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:04,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:14:04,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:14:04,846 INFO L87 Difference]: Start difference. First operand 30384 states and 52043 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:14:08,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:08,735 INFO L93 Difference]: Finished difference Result 110463 states and 199563 transitions. [2021-11-21 01:14:08,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:14:08,736 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2021-11-21 01:14:08,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:09,306 INFO L225 Difference]: With dead ends: 110463 [2021-11-21 01:14:09,306 INFO L226 Difference]: Without dead ends: 80084 [2021-11-21 01:14:09,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:14:09,571 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 1188 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:09,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1208 Valid, 1299 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 01:14:09,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80084 states. [2021-11-21 01:14:14,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80084 to 77140. [2021-11-21 01:14:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77140 states, 69101 states have (on average 1.56699613609065) internal successors, (108281), 66029 states have internal predecessors, (108281), 5218 states have call successors, (5218), 1980 states have call predecessors, (5218), 2820 states have return successors, (22146), 9131 states have call predecessors, (22146), 5218 states have call successors, (22146) [2021-11-21 01:14:15,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77140 states to 77140 states and 135645 transitions. [2021-11-21 01:14:15,650 INFO L78 Accepts]: Start accepts. Automaton has 77140 states and 135645 transitions. Word has length 77 [2021-11-21 01:14:15,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:15,666 INFO L470 AbstractCegarLoop]: Abstraction has 77140 states and 135645 transitions. [2021-11-21 01:14:15,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:14:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 77140 states and 135645 transitions. [2021-11-21 01:14:15,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-21 01:14:15,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:15,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:14:15,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:14:15,671 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:15,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:15,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1855952086, now seen corresponding path program 1 times [2021-11-21 01:14:15,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:15,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935241030] [2021-11-21 01:14:15,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:15,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:15,779 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:15,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935241030] [2021-11-21 01:14:15,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935241030] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:15,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:15,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:14:15,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228383135] [2021-11-21 01:14:15,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:15,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:14:15,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:15,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:14:15,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:14:15,782 INFO L87 Difference]: Start difference. First operand 77140 states and 135645 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:14:20,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:20,656 INFO L93 Difference]: Finished difference Result 229999 states and 421184 transitions. [2021-11-21 01:14:20,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:14:20,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2021-11-21 01:14:20,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:21,869 INFO L225 Difference]: With dead ends: 229999 [2021-11-21 01:14:21,869 INFO L226 Difference]: Without dead ends: 152864 [2021-11-21 01:14:22,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:14:22,170 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 534 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:22,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 800 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:14:22,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152864 states. [2021-11-21 01:14:29,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152864 to 152252. [2021-11-21 01:14:29,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152252 states, 136369 states have (on average 1.5567247688257595) internal successors, (212289), 130644 states have internal predecessors, (212289), 10242 states have call successors, (10242), 3960 states have call predecessors, (10242), 5640 states have return successors, (42770), 17648 states have call predecessors, (42770), 10242 states have call successors, (42770) [2021-11-21 01:14:31,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152252 states to 152252 states and 265301 transitions. [2021-11-21 01:14:31,450 INFO L78 Accepts]: Start accepts. Automaton has 152252 states and 265301 transitions. Word has length 77 [2021-11-21 01:14:31,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:31,467 INFO L470 AbstractCegarLoop]: Abstraction has 152252 states and 265301 transitions. [2021-11-21 01:14:31,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:14:31,468 INFO L276 IsEmpty]: Start isEmpty. Operand 152252 states and 265301 transitions. [2021-11-21 01:14:31,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-21 01:14:31,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:31,471 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:14:31,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:14:31,471 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:31,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:31,473 INFO L85 PathProgramCache]: Analyzing trace with hash 810364937, now seen corresponding path program 1 times [2021-11-21 01:14:31,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:31,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380707685] [2021-11-21 01:14:31,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:31,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:31,627 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:31,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380707685] [2021-11-21 01:14:31,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380707685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:31,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:31,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:14:31,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386019596] [2021-11-21 01:14:31,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:31,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:14:31,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:31,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:14:31,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:14:31,630 INFO L87 Difference]: Start difference. First operand 152252 states and 265301 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:14:41,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:41,270 INFO L93 Difference]: Finished difference Result 455523 states and 830571 transitions. [2021-11-21 01:14:41,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:14:41,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2021-11-21 01:14:41,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:43,206 INFO L225 Difference]: With dead ends: 455523 [2021-11-21 01:14:43,206 INFO L226 Difference]: Without dead ends: 303276