./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.10.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e6de03-a514-4b3d-9929-f2ac5be5afd1/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e6de03-a514-4b3d-9929-f2ac5be5afd1/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e6de03-a514-4b3d-9929-f2ac5be5afd1/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e6de03-a514-4b3d-9929-f2ac5be5afd1/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.10.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e6de03-a514-4b3d-9929-f2ac5be5afd1/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e6de03-a514-4b3d-9929-f2ac5be5afd1/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c68befe0cb772d649d152823cc17c89d77797d55cc04257d4beaaad2b518a7a0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:50:25,791 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:50:25,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:50:25,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:50:25,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:50:25,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:50:25,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:50:25,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:50:25,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:50:25,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:50:25,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:50:25,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:50:25,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:50:25,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:50:25,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:50:25,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:50:25,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:50:25,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:50:25,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:50:25,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:50:25,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:50:25,910 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:50:25,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:50:25,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:50:25,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:50:25,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:50:25,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:50:25,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:50:25,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:50:25,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:50:25,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:50:25,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:50:25,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:50:25,934 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:50:25,935 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:50:25,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:50:25,936 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:50:25,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:50:25,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:50:25,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:50:25,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:50:25,940 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e6de03-a514-4b3d-9929-f2ac5be5afd1/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:50:25,970 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:50:25,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:50:25,971 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:50:25,971 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:50:25,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:50:25,972 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:50:25,972 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:50:25,973 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:50:25,973 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:50:25,973 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:50:25,973 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:50:25,974 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:50:25,974 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:50:25,974 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:50:25,974 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:50:25,975 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:50:25,975 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:50:25,975 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:50:25,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:50:25,976 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:50:25,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:50:25,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:50:25,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:50:25,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:50:25,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:50:25,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:50:25,978 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:50:25,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:50:25,979 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:50:25,979 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:50:25,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:50:25,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:50:25,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:50:25,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:50:25,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:50:25,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:50:25,981 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:50:25,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:50:25,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:50:25,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:50:25,982 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:50:25,982 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_67e6de03-a514-4b3d-9929-f2ac5be5afd1/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e6de03-a514-4b3d-9929-f2ac5be5afd1/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c68befe0cb772d649d152823cc17c89d77797d55cc04257d4beaaad2b518a7a0 [2021-11-23 02:50:26,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:50:26,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:50:26,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:50:26,292 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:50:26,293 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:50:26,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e6de03-a514-4b3d-9929-f2ac5be5afd1/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/systemc/transmitter.10.cil.c [2021-11-23 02:50:26,391 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e6de03-a514-4b3d-9929-f2ac5be5afd1/bin/utaipan-EQgc7hIp5V/data/8487f726d/ccdc27cdff19426c8850d7ce8575e690/FLAGc7008af4a [2021-11-23 02:50:26,997 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:50:26,998 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e6de03-a514-4b3d-9929-f2ac5be5afd1/sv-benchmarks/c/systemc/transmitter.10.cil.c [2021-11-23 02:50:27,026 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e6de03-a514-4b3d-9929-f2ac5be5afd1/bin/utaipan-EQgc7hIp5V/data/8487f726d/ccdc27cdff19426c8850d7ce8575e690/FLAGc7008af4a [2021-11-23 02:50:27,289 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e6de03-a514-4b3d-9929-f2ac5be5afd1/bin/utaipan-EQgc7hIp5V/data/8487f726d/ccdc27cdff19426c8850d7ce8575e690 [2021-11-23 02:50:27,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:50:27,293 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:50:27,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:50:27,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:50:27,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:50:27,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:50:27" (1/1) ... [2021-11-23 02:50:27,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bf592cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:27, skipping insertion in model container [2021-11-23 02:50:27,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:50:27" (1/1) ... [2021-11-23 02:50:27,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:50:27,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:50:27,524 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_67e6de03-a514-4b3d-9929-f2ac5be5afd1/sv-benchmarks/c/systemc/transmitter.10.cil.c[706,719] [2021-11-23 02:50:27,639 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:50:27,650 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:50:27,663 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_67e6de03-a514-4b3d-9929-f2ac5be5afd1/sv-benchmarks/c/systemc/transmitter.10.cil.c[706,719] [2021-11-23 02:50:27,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:50:27,782 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:50:27,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:27 WrapperNode [2021-11-23 02:50:27,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:50:27,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:50:27,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:50:27,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:50:27,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:27" (1/1) ... [2021-11-23 02:50:27,807 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:27" (1/1) ... [2021-11-23 02:50:27,854 INFO L137 Inliner]: procedures = 48, calls = 60, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 720 [2021-11-23 02:50:27,855 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:50:27,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:50:27,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:50:27,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:50:27,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:27" (1/1) ... [2021-11-23 02:50:27,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:27" (1/1) ... [2021-11-23 02:50:27,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:27" (1/1) ... [2021-11-23 02:50:27,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:27" (1/1) ... [2021-11-23 02:50:27,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:27" (1/1) ... [2021-11-23 02:50:27,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:27" (1/1) ... [2021-11-23 02:50:27,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:27" (1/1) ... [2021-11-23 02:50:27,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:50:27,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:50:27,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:50:27,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:50:27,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:27" (1/1) ... [2021-11-23 02:50:27,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:50:27,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e6de03-a514-4b3d-9929-f2ac5be5afd1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:50:28,004 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e6de03-a514-4b3d-9929-f2ac5be5afd1/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:50:28,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e6de03-a514-4b3d-9929-f2ac5be5afd1/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:50:28,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:50:28,052 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-23 02:50:28,052 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-23 02:50:28,053 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-23 02:50:28,053 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-23 02:50:28,053 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-23 02:50:28,053 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-23 02:50:28,054 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-23 02:50:28,054 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-23 02:50:28,054 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-23 02:50:28,054 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-23 02:50:28,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:50:28,055 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-23 02:50:28,055 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-23 02:50:28,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:50:28,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:50:28,208 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:50:28,210 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:50:29,005 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:50:29,425 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:50:29,425 INFO L301 CfgBuilder]: Removed 14 assume(true) statements. [2021-11-23 02:50:29,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:50:29 BoogieIcfgContainer [2021-11-23 02:50:29,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:50:29,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:50:29,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:50:29,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:50:29,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:50:27" (1/3) ... [2021-11-23 02:50:29,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b81485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:50:29, skipping insertion in model container [2021-11-23 02:50:29,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:27" (2/3) ... [2021-11-23 02:50:29,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b81485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:50:29, skipping insertion in model container [2021-11-23 02:50:29,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:50:29" (3/3) ... [2021-11-23 02:50:29,439 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.10.cil.c [2021-11-23 02:50:29,445 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:50:29,445 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:50:29,501 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:50:29,509 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:50:29,509 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:50:29,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 164 states, 133 states have (on average 1.556390977443609) internal successors, (207), 135 states have internal predecessors, (207), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-23 02:50:29,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 02:50:29,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:29,546 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] [2021-11-23 02:50:29,547 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:29,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:29,553 INFO L85 PathProgramCache]: Analyzing trace with hash 128064639, now seen corresponding path program 1 times [2021-11-23 02:50:29,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:29,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392169065] [2021-11-23 02:50:29,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:29,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:50:29,980 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:29,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392169065] [2021-11-23 02:50:29,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392169065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:29,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:29,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:50:29,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656494238] [2021-11-23 02:50:29,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:29,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:50:29,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:30,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:50:30,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:50:30,021 INFO L87 Difference]: Start difference. First operand has 164 states, 133 states have (on average 1.556390977443609) internal successors, (207), 135 states have internal predecessors, (207), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2021-11-23 02:50:30,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:30,655 INFO L93 Difference]: Finished difference Result 475 states and 757 transitions. [2021-11-23 02:50:30,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:50:30,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 69 [2021-11-23 02:50:30,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:30,688 INFO L225 Difference]: With dead ends: 475 [2021-11-23 02:50:30,688 INFO L226 Difference]: Without dead ends: 312 [2021-11-23 02:50:30,703 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 [2021-11-23 02:50:30,713 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 433 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:30,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 686 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:50:30,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-23 02:50:30,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 309. [2021-11-23 02:50:30,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 255 states have (on average 1.5058823529411764) internal successors, (384), 256 states have internal predecessors, (384), 41 states have call successors, (41), 12 states have call predecessors, (41), 12 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-11-23 02:50:30,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 466 transitions. [2021-11-23 02:50:30,857 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 466 transitions. Word has length 69 [2021-11-23 02:50:30,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:30,858 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 466 transitions. [2021-11-23 02:50:30,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2021-11-23 02:50:30,858 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 466 transitions. [2021-11-23 02:50:30,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 02:50:30,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:30,872 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] [2021-11-23 02:50:30,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:50:30,873 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:30,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:30,878 INFO L85 PathProgramCache]: Analyzing trace with hash -903266176, now seen corresponding path program 1 times [2021-11-23 02:50:30,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:30,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851206636] [2021-11-23 02:50:30,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:30,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:50:31,095 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:31,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851206636] [2021-11-23 02:50:31,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851206636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:31,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:31,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:50:31,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959024902] [2021-11-23 02:50:31,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:31,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:50:31,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:31,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:50:31,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:50:31,099 INFO L87 Difference]: Start difference. First operand 309 states and 466 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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) [2021-11-23 02:50:31,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:31,823 INFO L93 Difference]: Finished difference Result 1056 states and 1611 transitions. [2021-11-23 02:50:31,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:50:31,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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 69 [2021-11-23 02:50:31,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:31,834 INFO L225 Difference]: With dead ends: 1056 [2021-11-23 02:50:31,835 INFO L226 Difference]: Without dead ends: 728 [2021-11-23 02:50:31,839 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 [2021-11-23 02:50:31,840 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 908 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:31,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 1095 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:50:31,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-11-23 02:50:31,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 716. [2021-11-23 02:50:31,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 607 states have (on average 1.4975288303130148) internal successors, (909), 599 states have internal predecessors, (909), 80 states have call successors, (80), 26 states have call predecessors, (80), 28 states have return successors, (91), 91 states have call predecessors, (91), 80 states have call successors, (91) [2021-11-23 02:50:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1080 transitions. [2021-11-23 02:50:31,926 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1080 transitions. Word has length 69 [2021-11-23 02:50:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:31,926 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 1080 transitions. [2021-11-23 02:50:31,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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) [2021-11-23 02:50:31,928 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1080 transitions. [2021-11-23 02:50:31,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 02:50:31,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:31,932 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] [2021-11-23 02:50:31,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:50:31,933 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:31,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:31,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1177044671, now seen corresponding path program 1 times [2021-11-23 02:50:31,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:31,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953707450] [2021-11-23 02:50:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:31,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:50:32,079 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:32,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953707450] [2021-11-23 02:50:32,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953707450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:32,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:32,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:50:32,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105299046] [2021-11-23 02:50:32,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:32,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:50:32,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:32,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:50:32,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:50:32,083 INFO L87 Difference]: Start difference. First operand 716 states and 1080 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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) [2021-11-23 02:50:32,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:32,726 INFO L93 Difference]: Finished difference Result 2507 states and 3833 transitions. [2021-11-23 02:50:32,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:50:32,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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 69 [2021-11-23 02:50:32,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:32,747 INFO L225 Difference]: With dead ends: 2507 [2021-11-23 02:50:32,747 INFO L226 Difference]: Without dead ends: 1751 [2021-11-23 02:50:32,753 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 [2021-11-23 02:50:32,761 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 908 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:32,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 902 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:50:32,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2021-11-23 02:50:32,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1363. [2021-11-23 02:50:32,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1158 states have (on average 1.498272884283247) internal successors, (1735), 1151 states have internal predecessors, (1735), 148 states have call successors, (148), 50 states have call predecessors, (148), 56 states have return successors, (180), 162 states have call predecessors, (180), 148 states have call successors, (180) [2021-11-23 02:50:32,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 2063 transitions. [2021-11-23 02:50:32,905 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 2063 transitions. Word has length 69 [2021-11-23 02:50:32,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:32,905 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 2063 transitions. [2021-11-23 02:50:32,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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) [2021-11-23 02:50:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 2063 transitions. [2021-11-23 02:50:32,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 02:50:32,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:32,911 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] [2021-11-23 02:50:32,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:50:32,912 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:32,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:32,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1387585568, now seen corresponding path program 1 times [2021-11-23 02:50:32,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:32,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108200633] [2021-11-23 02:50:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:32,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:50:33,053 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:33,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108200633] [2021-11-23 02:50:33,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108200633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:33,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:33,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:50:33,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271610780] [2021-11-23 02:50:33,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:33,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:50:33,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:33,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:50:33,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:50:33,057 INFO L87 Difference]: Start difference. First operand 1363 states and 2063 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2021-11-23 02:50:33,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:33,497 INFO L93 Difference]: Finished difference Result 4050 states and 6235 transitions. [2021-11-23 02:50:33,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:50:33,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 69 [2021-11-23 02:50:33,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:33,529 INFO L225 Difference]: With dead ends: 4050 [2021-11-23 02:50:33,529 INFO L226 Difference]: Without dead ends: 2692 [2021-11-23 02:50:33,540 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 [2021-11-23 02:50:33,552 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 448 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:33,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 684 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:50:33,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2021-11-23 02:50:33,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2680. [2021-11-23 02:50:33,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2680 states, 2283 states have (on average 1.4883924660534384) internal successors, (3398), 2269 states have internal predecessors, (3398), 284 states have call successors, (284), 100 states have call predecessors, (284), 112 states have return successors, (345), 311 states have call predecessors, (345), 284 states have call successors, (345) [2021-11-23 02:50:33,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2680 states to 2680 states and 4027 transitions. [2021-11-23 02:50:33,749 INFO L78 Accepts]: Start accepts. Automaton has 2680 states and 4027 transitions. Word has length 69 [2021-11-23 02:50:33,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:33,750 INFO L470 AbstractCegarLoop]: Abstraction has 2680 states and 4027 transitions. [2021-11-23 02:50:33,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2021-11-23 02:50:33,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2680 states and 4027 transitions. [2021-11-23 02:50:33,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 02:50:33,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:33,753 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] [2021-11-23 02:50:33,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:50:33,753 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:33,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:33,754 INFO L85 PathProgramCache]: Analyzing trace with hash 112482879, now seen corresponding path program 1 times [2021-11-23 02:50:33,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:33,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429986430] [2021-11-23 02:50:33,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:33,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:50:33,868 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:33,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429986430] [2021-11-23 02:50:33,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429986430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:33,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:33,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:50:33,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376769131] [2021-11-23 02:50:33,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:33,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:50:33,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:33,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:50:33,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:50:33,871 INFO L87 Difference]: Start difference. First operand 2680 states and 4027 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2021-11-23 02:50:34,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:34,451 INFO L93 Difference]: Finished difference Result 7973 states and 12179 transitions. [2021-11-23 02:50:34,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:50:34,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 69 [2021-11-23 02:50:34,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:34,500 INFO L225 Difference]: With dead ends: 7973 [2021-11-23 02:50:34,501 INFO L226 Difference]: Without dead ends: 5298 [2021-11-23 02:50:34,514 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 [2021-11-23 02:50:34,515 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 454 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:34,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 684 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:50:34,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5298 states. [2021-11-23 02:50:34,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5298 to 5276. [2021-11-23 02:50:34,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5276 states, 4503 states have (on average 1.4779036198090163) internal successors, (6655), 4476 states have internal predecessors, (6655), 548 states have call successors, (548), 200 states have call predecessors, (548), 224 states have return successors, (664), 600 states have call predecessors, (664), 548 states have call successors, (664) [2021-11-23 02:50:34,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5276 states to 5276 states and 7867 transitions. [2021-11-23 02:50:34,893 INFO L78 Accepts]: Start accepts. Automaton has 5276 states and 7867 transitions. Word has length 69 [2021-11-23 02:50:34,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:34,893 INFO L470 AbstractCegarLoop]: Abstraction has 5276 states and 7867 transitions. [2021-11-23 02:50:34,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2021-11-23 02:50:34,894 INFO L276 IsEmpty]: Start isEmpty. Operand 5276 states and 7867 transitions. [2021-11-23 02:50:34,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 02:50:34,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:34,896 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] [2021-11-23 02:50:34,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:50:34,896 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:34,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:34,897 INFO L85 PathProgramCache]: Analyzing trace with hash 635803550, now seen corresponding path program 1 times [2021-11-23 02:50:34,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:34,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047034612] [2021-11-23 02:50:34,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:34,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:50:34,969 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:34,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047034612] [2021-11-23 02:50:34,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047034612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:34,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:34,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:50:34,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895291513] [2021-11-23 02:50:34,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:34,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:50:34,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:34,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:50:34,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:50:34,972 INFO L87 Difference]: Start difference. First operand 5276 states and 7867 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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) [2021-11-23 02:50:36,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:36,081 INFO L93 Difference]: Finished difference Result 17809 states and 27018 transitions. [2021-11-23 02:50:36,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:50:36,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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 69 [2021-11-23 02:50:36,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:36,184 INFO L225 Difference]: With dead ends: 17809 [2021-11-23 02:50:36,185 INFO L226 Difference]: Without dead ends: 12210 [2021-11-23 02:50:36,215 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 [2021-11-23 02:50:36,218 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 908 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:36,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 902 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:50:36,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12210 states. [2021-11-23 02:50:37,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12210 to 10144. [2021-11-23 02:50:37,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 8651 states have (on average 1.4753207721650676) internal successors, (12763), 8640 states have internal predecessors, (12763), 1044 states have call successors, (1044), 392 states have call predecessors, (1044), 448 states have return successors, (1304), 1112 states have call predecessors, (1304), 1044 states have call successors, (1304) [2021-11-23 02:50:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 15111 transitions. [2021-11-23 02:50:37,109 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 15111 transitions. Word has length 69 [2021-11-23 02:50:37,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:37,110 INFO L470 AbstractCegarLoop]: Abstraction has 10144 states and 15111 transitions. [2021-11-23 02:50:37,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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) [2021-11-23 02:50:37,111 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 15111 transitions. [2021-11-23 02:50:37,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 02:50:37,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:37,119 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] [2021-11-23 02:50:37,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:50:37,120 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:37,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:37,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1554778173, now seen corresponding path program 1 times [2021-11-23 02:50:37,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:37,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134361079] [2021-11-23 02:50:37,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:37,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:50:37,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:37,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134361079] [2021-11-23 02:50:37,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134361079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:37,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:37,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:50:37,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292294506] [2021-11-23 02:50:37,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:37,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:50:37,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:37,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:50:37,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:50:37,237 INFO L87 Difference]: Start difference. First operand 10144 states and 15111 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:50:38,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:38,865 INFO L93 Difference]: Finished difference Result 31616 states and 47145 transitions. [2021-11-23 02:50:38,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:50:38,866 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (5), 2 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 69 [2021-11-23 02:50:38,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:39,040 INFO L225 Difference]: With dead ends: 31616 [2021-11-23 02:50:39,040 INFO L226 Difference]: Without dead ends: 21478 [2021-11-23 02:50:39,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:50:39,091 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 927 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:39,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 612 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:50:39,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21478 states. [2021-11-23 02:50:40,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21478 to 17148. [2021-11-23 02:50:40,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17148 states, 14791 states have (on average 1.4616320735582449) internal successors, (21619), 14768 states have internal predecessors, (21619), 1588 states have call successors, (1588), 656 states have call predecessors, (1588), 768 states have return successors, (2108), 1724 states have call predecessors, (2108), 1588 states have call successors, (2108) [2021-11-23 02:50:40,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17148 states to 17148 states and 25315 transitions. [2021-11-23 02:50:40,634 INFO L78 Accepts]: Start accepts. Automaton has 17148 states and 25315 transitions. Word has length 69 [2021-11-23 02:50:40,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:40,635 INFO L470 AbstractCegarLoop]: Abstraction has 17148 states and 25315 transitions. [2021-11-23 02:50:40,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:50:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 17148 states and 25315 transitions. [2021-11-23 02:50:40,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 02:50:40,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:40,638 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] [2021-11-23 02:50:40,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:50:40,639 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:40,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:40,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1973817297, now seen corresponding path program 1 times [2021-11-23 02:50:40,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:40,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768294046] [2021-11-23 02:50:40,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:40,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:50:40,768 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:40,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768294046] [2021-11-23 02:50:40,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768294046] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:40,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:40,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:50:40,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742935507] [2021-11-23 02:50:40,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:40,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:50:40,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:40,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:50:40,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:50:40,775 INFO L87 Difference]: Start difference. First operand 17148 states and 25315 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:50:43,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:43,492 INFO L93 Difference]: Finished difference Result 63632 states and 94046 transitions. [2021-11-23 02:50:43,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:50:43,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (5), 2 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 70 [2021-11-23 02:50:43,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:43,749 INFO L225 Difference]: With dead ends: 63632 [2021-11-23 02:50:43,749 INFO L226 Difference]: Without dead ends: 46490 [2021-11-23 02:50:43,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:50:43,828 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 907 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:43,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 683 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:50:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46490 states. [2021-11-23 02:50:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46490 to 33672. [2021-11-23 02:50:46,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33672 states, 29059 states have (on average 1.4559000653842182) internal successors, (42307), 29020 states have internal predecessors, (42307), 3076 states have call successors, (3076), 1312 states have call predecessors, (3076), 1536 states have return successors, (4060), 3340 states have call predecessors, (4060), 3076 states have call successors, (4060) [2021-11-23 02:50:46,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33672 states to 33672 states and 49443 transitions. [2021-11-23 02:50:46,367 INFO L78 Accepts]: Start accepts. Automaton has 33672 states and 49443 transitions. Word has length 70 [2021-11-23 02:50:46,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:46,367 INFO L470 AbstractCegarLoop]: Abstraction has 33672 states and 49443 transitions. [2021-11-23 02:50:46,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:50:46,368 INFO L276 IsEmpty]: Start isEmpty. Operand 33672 states and 49443 transitions. [2021-11-23 02:50:46,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:50:46,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:46,370 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] [2021-11-23 02:50:46,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:50:46,371 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:46,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:46,372 INFO L85 PathProgramCache]: Analyzing trace with hash 996325652, now seen corresponding path program 1 times [2021-11-23 02:50:46,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:46,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642905493] [2021-11-23 02:50:46,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:46,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:50:46,512 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:46,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642905493] [2021-11-23 02:50:46,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642905493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:46,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:46,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:50:46,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042571059] [2021-11-23 02:50:46,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:46,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:50:46,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:46,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:50:46,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:50:46,515 INFO L87 Difference]: Start difference. First operand 33672 states and 49443 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:50:49,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:49,716 INFO L93 Difference]: Finished difference Result 96636 states and 142253 transitions. [2021-11-23 02:50:49,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:50:49,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (5), 2 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 71 [2021-11-23 02:50:49,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:50,041 INFO L225 Difference]: With dead ends: 96636 [2021-11-23 02:50:50,041 INFO L226 Difference]: Without dead ends: 62970 [2021-11-23 02:50:50,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:50:50,434 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 834 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:50,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 641 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:50:50,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62970 states. [2021-11-23 02:50:53,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62970 to 50072. [2021-11-23 02:50:54,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50072 states, 43171 states have (on average 1.4510435245882654) internal successors, (62643), 43044 states have internal predecessors, (62643), 4596 states have call successors, (4596), 1984 states have call predecessors, (4596), 2304 states have return successors, (5972), 5044 states have call predecessors, (5972), 4596 states have call successors, (5972) [2021-11-23 02:50:54,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50072 states to 50072 states and 73211 transitions. [2021-11-23 02:50:54,359 INFO L78 Accepts]: Start accepts. Automaton has 50072 states and 73211 transitions. Word has length 71 [2021-11-23 02:50:54,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:54,360 INFO L470 AbstractCegarLoop]: Abstraction has 50072 states and 73211 transitions. [2021-11-23 02:50:54,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:50:54,360 INFO L276 IsEmpty]: Start isEmpty. Operand 50072 states and 73211 transitions. [2021-11-23 02:50:54,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 02:50:54,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:54,363 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] [2021-11-23 02:50:54,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:50:54,364 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:54,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:54,365 INFO L85 PathProgramCache]: Analyzing trace with hash -447451731, now seen corresponding path program 1 times [2021-11-23 02:50:54,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:54,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061468952] [2021-11-23 02:50:54,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:54,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:50:54,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:54,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061468952] [2021-11-23 02:50:54,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061468952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:54,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:54,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:50:54,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355704748] [2021-11-23 02:50:54,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:54,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:50:54,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:54,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:50:54,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:50:54,482 INFO L87 Difference]: Start difference. First operand 50072 states and 73211 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:50:59,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:59,332 INFO L93 Difference]: Finished difference Result 141300 states and 207293 transitions. [2021-11-23 02:50:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:50:59,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (5), 2 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 72 [2021-11-23 02:50:59,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:59,744 INFO L225 Difference]: With dead ends: 141300 [2021-11-23 02:50:59,744 INFO L226 Difference]: Without dead ends: 91234 [2021-11-23 02:51:00,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:51:00,241 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 769 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:00,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 774 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:51:00,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91234 states. [2021-11-23 02:51:04,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91234 to 74624. [2021-11-23 02:51:04,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74624 states, 64283 states have (on average 1.4461521708694367) internal successors, (92963), 63980 states have internal predecessors, (92963), 6884 states have call successors, (6884), 3008 states have call predecessors, (6884), 3456 states have return successors, (8772), 7636 states have call predecessors, (8772), 6884 states have call successors, (8772) [2021-11-23 02:51:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74624 states to 74624 states and 108619 transitions. [2021-11-23 02:51:05,573 INFO L78 Accepts]: Start accepts. Automaton has 74624 states and 108619 transitions. Word has length 72 [2021-11-23 02:51:05,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:05,590 INFO L470 AbstractCegarLoop]: Abstraction has 74624 states and 108619 transitions. [2021-11-23 02:51:05,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:51:05,591 INFO L276 IsEmpty]: Start isEmpty. Operand 74624 states and 108619 transitions. [2021-11-23 02:51:05,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 02:51:05,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:05,594 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] [2021-11-23 02:51:05,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:51:05,594 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:05,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:05,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1862629176, now seen corresponding path program 1 times [2021-11-23 02:51:05,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:05,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356689210] [2021-11-23 02:51:05,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:05,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:05,723 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:05,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356689210] [2021-11-23 02:51:05,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356689210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:05,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:05,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:51:05,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022670535] [2021-11-23 02:51:05,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:05,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:51:05,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:05,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:51:05,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:51:05,727 INFO L87 Difference]: Start difference. First operand 74624 states and 108619 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:51:14,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:14,919 INFO L93 Difference]: Finished difference Result 259796 states and 379566 transitions. [2021-11-23 02:51:14,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:51:14,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (5), 2 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 73 [2021-11-23 02:51:14,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:15,929 INFO L225 Difference]: With dead ends: 259796 [2021-11-23 02:51:15,929 INFO L226 Difference]: Without dead ends: 185178 [2021-11-23 02:51:16,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:51:16,125 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 853 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:16,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 565 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:51:16,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185178 states. [2021-11-23 02:51:24,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185178 to 146328. [2021-11-23 02:51:24,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146328 states, 126083 states have (on average 1.4397103495316577) internal successors, (181523), 125540 states have internal predecessors, (181523), 13332 states have call successors, (13332), 6016 states have call predecessors, (13332), 6912 states have return successors, (16884), 14772 states have call predecessors, (16884), 13332 states have call successors, (16884) [2021-11-23 02:51:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146328 states to 146328 states and 211739 transitions. [2021-11-23 02:51:26,320 INFO L78 Accepts]: Start accepts. Automaton has 146328 states and 211739 transitions. Word has length 73 [2021-11-23 02:51:26,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:26,321 INFO L470 AbstractCegarLoop]: Abstraction has 146328 states and 211739 transitions. [2021-11-23 02:51:26,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:51:26,322 INFO L276 IsEmpty]: Start isEmpty. Operand 146328 states and 211739 transitions. [2021-11-23 02:51:26,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 02:51:26,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:26,327 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] [2021-11-23 02:51:26,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:51:26,328 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:26,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:26,328 INFO L85 PathProgramCache]: Analyzing trace with hash -99220599, now seen corresponding path program 1 times [2021-11-23 02:51:26,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:26,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134106085] [2021-11-23 02:51:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:26,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:26,446 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:26,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134106085] [2021-11-23 02:51:26,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134106085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:26,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:26,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:51:26,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945898068] [2021-11-23 02:51:26,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:26,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:51:26,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:26,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:51:26,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:51:26,449 INFO L87 Difference]: Start difference. First operand 146328 states and 211739 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)