./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_140ae8e4-1b34-40fe-846d-2a1527667b9c/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_140ae8e4-1b34-40fe-846d-2a1527667b9c/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_140ae8e4-1b34-40fe-846d-2a1527667b9c/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_140ae8e4-1b34-40fe-846d-2a1527667b9c/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_140ae8e4-1b34-40fe-846d-2a1527667b9c/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_140ae8e4-1b34-40fe-846d-2a1527667b9c/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 940a677bfde7dbbc79e036121bd0ec6fd3518c0f58a02d336e5d42fafb098792 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:11:25,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:11:25,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:11:25,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:11:25,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:11:25,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:11:25,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:11:25,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:11:25,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:11:25,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:11:25,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:11:25,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:11:25,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:11:25,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:11:25,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:11:25,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:11:25,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:11:25,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:11:25,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:11:25,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:11:25,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:11:25,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:11:25,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:11:25,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:11:25,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:11:25,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:11:25,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:11:25,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:11:25,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:11:25,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:11:25,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:11:25,836 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:11:25,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:11:25,838 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:11:25,839 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:11:25,840 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:11:25,840 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:11:25,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:11:25,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:11:25,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:11:25,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:11:25,844 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_140ae8e4-1b34-40fe-846d-2a1527667b9c/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:11:25,870 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:11:25,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:11:25,875 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:11:25,876 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:11:25,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:11:25,880 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:11:25,880 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:11:25,880 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:11:25,880 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:11:25,881 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:11:25,882 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:11:25,882 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:11:25,882 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:11:25,882 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:11:25,883 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:11:25,883 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:11:25,883 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:11:25,883 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:11:25,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:11:25,884 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:11:25,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:11:25,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:11:25,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:11:25,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:11:25,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:11:25,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:11:25,887 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:11:25,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:11:25,888 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:11:25,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:11:25,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:11:25,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:11:25,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:11:25,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:11:25,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:11:25,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:11:25,890 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:11:25,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:11:25,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:11:25,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:11:25,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:11:25,891 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_140ae8e4-1b34-40fe-846d-2a1527667b9c/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_140ae8e4-1b34-40fe-846d-2a1527667b9c/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 940a677bfde7dbbc79e036121bd0ec6fd3518c0f58a02d336e5d42fafb098792 [2021-11-21 01:11:26,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:11:26,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:11:26,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:11:26,209 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:11:26,209 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:11:26,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_140ae8e4-1b34-40fe-846d-2a1527667b9c/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/systemc/transmitter.11.cil.c [2021-11-21 01:11:26,277 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_140ae8e4-1b34-40fe-846d-2a1527667b9c/bin/utaipan-TEXQjIfE4P/data/444b0e2ac/6d6c9a70cb984ea69737cf5a42dd29ce/FLAG364469bf6 [2021-11-21 01:11:26,845 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:11:26,845 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_140ae8e4-1b34-40fe-846d-2a1527667b9c/sv-benchmarks/c/systemc/transmitter.11.cil.c [2021-11-21 01:11:26,862 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_140ae8e4-1b34-40fe-846d-2a1527667b9c/bin/utaipan-TEXQjIfE4P/data/444b0e2ac/6d6c9a70cb984ea69737cf5a42dd29ce/FLAG364469bf6 [2021-11-21 01:11:27,157 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_140ae8e4-1b34-40fe-846d-2a1527667b9c/bin/utaipan-TEXQjIfE4P/data/444b0e2ac/6d6c9a70cb984ea69737cf5a42dd29ce [2021-11-21 01:11:27,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:11:27,173 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:11:27,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:11:27,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:11:27,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:11:27,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:11:27" (1/1) ... [2021-11-21 01:11:27,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@594c6bb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:27, skipping insertion in model container [2021-11-21 01:11:27,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:11:27" (1/1) ... [2021-11-21 01:11:27,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:11:27,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:11:27,443 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_140ae8e4-1b34-40fe-846d-2a1527667b9c/sv-benchmarks/c/systemc/transmitter.11.cil.c[706,719] [2021-11-21 01:11:27,591 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:11:27,608 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:11:27,626 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_140ae8e4-1b34-40fe-846d-2a1527667b9c/sv-benchmarks/c/systemc/transmitter.11.cil.c[706,719] [2021-11-21 01:11:27,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:11:27,757 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:11:27,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:27 WrapperNode [2021-11-21 01:11:27,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:11:27,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:11:27,758 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:11:27,758 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:11:27,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:27" (1/1) ... [2021-11-21 01:11:27,798 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:27" (1/1) ... [2021-11-21 01:11:27,850 INFO L137 Inliner]: procedures = 50, calls = 63, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 777 [2021-11-21 01:11:27,850 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:11:27,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:11:27,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:11:27,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:11:27,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:27" (1/1) ... [2021-11-21 01:11:27,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:27" (1/1) ... [2021-11-21 01:11:27,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:27" (1/1) ... [2021-11-21 01:11:27,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:27" (1/1) ... [2021-11-21 01:11:27,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:27" (1/1) ... [2021-11-21 01:11:27,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:27" (1/1) ... [2021-11-21 01:11:27,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:27" (1/1) ... [2021-11-21 01:11:27,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:11:27,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:11:27,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:11:27,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:11:27,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:27" (1/1) ... [2021-11-21 01:11:27,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:11:27,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_140ae8e4-1b34-40fe-846d-2a1527667b9c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:11:27,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_140ae8e4-1b34-40fe-846d-2a1527667b9c/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:11:27,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_140ae8e4-1b34-40fe-846d-2a1527667b9c/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:11:28,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:11:28,033 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-21 01:11:28,033 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-21 01:11:28,034 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-21 01:11:28,034 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-21 01:11:28,034 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-21 01:11:28,034 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-21 01:11:28,034 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-21 01:11:28,034 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-21 01:11:28,034 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-21 01:11:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-21 01:11:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-21 01:11:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-21 01:11:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:11:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:11:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:11:28,174 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:11:28,175 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:11:28,962 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:11:29,372 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:11:29,373 INFO L301 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-21 01:11:29,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:11:29 BoogieIcfgContainer [2021-11-21 01:11:29,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:11:29,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:11:29,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:11:29,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:11:29,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:11:27" (1/3) ... [2021-11-21 01:11:29,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3b4aff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:11:29, skipping insertion in model container [2021-11-21 01:11:29,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:27" (2/3) ... [2021-11-21 01:11:29,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3b4aff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:11:29, skipping insertion in model container [2021-11-21 01:11:29,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:11:29" (3/3) ... [2021-11-21 01:11:29,387 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.11.cil.c [2021-11-21 01:11:29,392 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:11:29,393 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:11:29,444 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:11:29,451 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:11:29,451 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:11:29,473 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 143 states have (on average 1.5594405594405594) internal successors, (223), 145 states have internal predecessors, (223), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-21 01:11:29,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 01:11:29,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:29,490 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] [2021-11-21 01:11:29,498 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:11:29,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:29,503 INFO L85 PathProgramCache]: Analyzing trace with hash 626698193, now seen corresponding path program 1 times [2021-11-21 01:11:29,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:29,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843161950] [2021-11-21 01:11:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:29,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:11:29,939 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:29,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843161950] [2021-11-21 01:11:29,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843161950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:29,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:29,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:11:29,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350221748] [2021-11-21 01:11:29,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:29,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:11:29,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:29,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:11:29,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:11:29,987 INFO L87 Difference]: Start difference. First operand has 175 states, 143 states have (on average 1.5594405594405594) internal successors, (223), 145 states have internal predecessors, (223), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:11:30,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:30,545 INFO L93 Difference]: Finished difference Result 512 states and 807 transitions. [2021-11-21 01:11:30,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:11:30,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 73 [2021-11-21 01:11:30,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:30,568 INFO L225 Difference]: With dead ends: 512 [2021-11-21 01:11:30,569 INFO L226 Difference]: Without dead ends: 338 [2021-11-21 01:11:30,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:11:30,583 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 474 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:30,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 746 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:11:30,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-21 01:11:30,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 334. [2021-11-21 01:11:30,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 277 states have (on average 1.51985559566787) internal successors, (421), 279 states have internal predecessors, (421), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2021-11-21 01:11:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 509 transitions. [2021-11-21 01:11:30,692 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 509 transitions. Word has length 73 [2021-11-21 01:11:30,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:30,692 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 509 transitions. [2021-11-21 01:11:30,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:11:30,693 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 509 transitions. [2021-11-21 01:11:30,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 01:11:30,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:30,698 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] [2021-11-21 01:11:30,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:11:30,698 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:11:30,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:30,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1203626834, now seen corresponding path program 1 times [2021-11-21 01:11:30,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:30,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291319593] [2021-11-21 01:11:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:30,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:30,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:11:30,806 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:30,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291319593] [2021-11-21 01:11:30,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291319593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:30,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:30,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:11:30,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044117127] [2021-11-21 01:11:30,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:30,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:11:30,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:30,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:11:30,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:11:30,811 INFO L87 Difference]: Start difference. First operand 334 states and 509 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:11:31,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:31,654 INFO L93 Difference]: Finished difference Result 1945 states and 3133 transitions. [2021-11-21 01:11:31,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:11:31,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 73 [2021-11-21 01:11:31,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:31,685 INFO L225 Difference]: With dead ends: 1945 [2021-11-21 01:11:31,685 INFO L226 Difference]: Without dead ends: 1616 [2021-11-21 01:11:31,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:11:31,695 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 1115 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:31,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1129 Valid, 1214 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:11:31,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-11-21 01:11:31,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1580. [2021-11-21 01:11:31,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1327 states have (on average 1.5169555388093443) internal successors, (2013), 1335 states have internal predecessors, (2013), 192 states have call successors, (192), 60 states have call predecessors, (192), 60 states have return successors, (298), 185 states have call predecessors, (298), 192 states have call successors, (298) [2021-11-21 01:11:31,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2503 transitions. [2021-11-21 01:11:31,900 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2503 transitions. Word has length 73 [2021-11-21 01:11:31,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:31,902 INFO L470 AbstractCegarLoop]: Abstraction has 1580 states and 2503 transitions. [2021-11-21 01:11:31,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:11:31,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2503 transitions. [2021-11-21 01:11:31,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 01:11:31,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:31,918 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] [2021-11-21 01:11:31,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:11:31,918 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:11:31,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:31,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1443894163, now seen corresponding path program 1 times [2021-11-21 01:11:31,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:31,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640795369] [2021-11-21 01:11:31,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:31,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:11:32,070 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:32,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640795369] [2021-11-21 01:11:32,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640795369] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:32,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:32,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:11:32,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28882270] [2021-11-21 01:11:32,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:32,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:11:32,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:32,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:11:32,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:11:32,072 INFO L87 Difference]: Start difference. First operand 1580 states and 2503 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:11:33,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:33,090 INFO L93 Difference]: Finished difference Result 6243 states and 10199 transitions. [2021-11-21 01:11:33,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:11:33,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 73 [2021-11-21 01:11:33,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:33,131 INFO L225 Difference]: With dead ends: 6243 [2021-11-21 01:11:33,131 INFO L226 Difference]: Without dead ends: 4668 [2021-11-21 01:11:33,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:11:33,142 INFO L933 BasicCegarLoop]: 604 mSDtfsCounter, 1118 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:33,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1124 Valid, 1226 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:11:33,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2021-11-21 01:11:33,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 4382. [2021-11-21 01:11:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 3775 states have (on average 1.5282119205298013) internal successors, (5769), 3725 states have internal predecessors, (5769), 442 states have call successors, (442), 148 states have call predecessors, (442), 164 states have return successors, (900), 509 states have call predecessors, (900), 442 states have call successors, (900) [2021-11-21 01:11:33,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 7111 transitions. [2021-11-21 01:11:33,491 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 7111 transitions. Word has length 73 [2021-11-21 01:11:33,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:33,491 INFO L470 AbstractCegarLoop]: Abstraction has 4382 states and 7111 transitions. [2021-11-21 01:11:33,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:11:33,491 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 7111 transitions. [2021-11-21 01:11:33,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 01:11:33,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:33,494 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] [2021-11-21 01:11:33,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:11:33,495 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:11:33,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:33,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1546695410, now seen corresponding path program 1 times [2021-11-21 01:11:33,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:33,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868933835] [2021-11-21 01:11:33,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:33,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:11:33,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:33,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868933835] [2021-11-21 01:11:33,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868933835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:33,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:33,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:11:33,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290492764] [2021-11-21 01:11:33,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:33,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:11:33,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:33,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:11:33,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:11:33,577 INFO L87 Difference]: Start difference. First operand 4382 states and 7111 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:11:34,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:34,252 INFO L93 Difference]: Finished difference Result 13053 states and 21820 transitions. [2021-11-21 01:11:34,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:11:34,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 73 [2021-11-21 01:11:34,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:34,328 INFO L225 Difference]: With dead ends: 13053 [2021-11-21 01:11:34,328 INFO L226 Difference]: Without dead ends: 8676 [2021-11-21 01:11:34,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:11:34,357 INFO L933 BasicCegarLoop]: 415 mSDtfsCounter, 483 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:34,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 744 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:11:34,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8676 states. [2021-11-21 01:11:34,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8676 to 8644. [2021-11-21 01:11:34,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8644 states, 7457 states have (on average 1.5187072549282554) internal successors, (11325), 7364 states have internal predecessors, (11325), 858 states have call successors, (858), 296 states have call predecessors, (858), 328 states have return successors, (1738), 984 states have call predecessors, (1738), 858 states have call successors, (1738) [2021-11-21 01:11:35,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8644 states to 8644 states and 13921 transitions. [2021-11-21 01:11:35,026 INFO L78 Accepts]: Start accepts. Automaton has 8644 states and 13921 transitions. Word has length 73 [2021-11-21 01:11:35,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:35,026 INFO L470 AbstractCegarLoop]: Abstraction has 8644 states and 13921 transitions. [2021-11-21 01:11:35,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:11:35,027 INFO L276 IsEmpty]: Start isEmpty. Operand 8644 states and 13921 transitions. [2021-11-21 01:11:35,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 01:11:35,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:35,030 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] [2021-11-21 01:11:35,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:11:35,030 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:11:35,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:35,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1315437167, now seen corresponding path program 1 times [2021-11-21 01:11:35,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:35,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357627371] [2021-11-21 01:11:35,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:35,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:35,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:11:35,104 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:35,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357627371] [2021-11-21 01:11:35,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357627371] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:35,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:35,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:11:35,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648316526] [2021-11-21 01:11:35,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:35,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:11:35,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:35,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:11:35,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:11:35,113 INFO L87 Difference]: Start difference. First operand 8644 states and 13921 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:11:36,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:36,896 INFO L93 Difference]: Finished difference Result 31731 states and 53021 transitions. [2021-11-21 01:11:36,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:11:36,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 73 [2021-11-21 01:11:36,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:37,110 INFO L225 Difference]: With dead ends: 31731 [2021-11-21 01:11:37,110 INFO L226 Difference]: Without dead ends: 23092 [2021-11-21 01:11:37,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:11:37,178 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 1108 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:37,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1116 Valid, 1220 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:11:37,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23092 states. [2021-11-21 01:11:38,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23092 to 21824. [2021-11-21 01:11:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21824 states, 19065 states have (on average 1.529976396538159) internal successors, (29169), 18612 states have internal predecessors, (29169), 1918 states have call successors, (1918), 696 states have call predecessors, (1918), 840 states have return successors, (4950), 2516 states have call predecessors, (4950), 1918 states have call successors, (4950) [2021-11-21 01:11:38,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21824 states to 21824 states and 36037 transitions. [2021-11-21 01:11:38,615 INFO L78 Accepts]: Start accepts. Automaton has 21824 states and 36037 transitions. Word has length 73 [2021-11-21 01:11:38,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:38,616 INFO L470 AbstractCegarLoop]: Abstraction has 21824 states and 36037 transitions. [2021-11-21 01:11:38,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:11:38,617 INFO L276 IsEmpty]: Start isEmpty. Operand 21824 states and 36037 transitions. [2021-11-21 01:11:38,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 01:11:38,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:38,622 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] [2021-11-21 01:11:38,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:11:38,622 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:11:38,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:38,624 INFO L85 PathProgramCache]: Analyzing trace with hash 824015728, now seen corresponding path program 1 times [2021-11-21 01:11:38,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:38,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054233011] [2021-11-21 01:11:38,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:38,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:11:38,726 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:38,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054233011] [2021-11-21 01:11:38,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054233011] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:38,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:38,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:11:38,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854084164] [2021-11-21 01:11:38,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:38,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:11:38,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:38,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:11:38,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:11:38,729 INFO L87 Difference]: Start difference. First operand 21824 states and 36037 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:11:41,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:41,637 INFO L93 Difference]: Finished difference Result 78571 states and 135821 transitions. [2021-11-21 01:11:41,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:11:41,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 73 [2021-11-21 01:11:41,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:42,163 INFO L225 Difference]: With dead ends: 78571 [2021-11-21 01:11:42,163 INFO L226 Difference]: Without dead ends: 56752 [2021-11-21 01:11:42,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:11:42,268 INFO L933 BasicCegarLoop]: 588 mSDtfsCounter, 1103 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:42,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1122 Valid, 1207 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:11:42,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56752 states. [2021-11-21 01:11:45,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56752 to 54052. [2021-11-21 01:11:45,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54052 states, 47601 states have (on average 1.543265897775257) internal successors, (73461), 46028 states have internal predecessors, (73461), 4298 states have call successors, (4298), 1640 states have call predecessors, (4298), 2152 states have return successors, (13986), 6384 states have call predecessors, (13986), 4298 states have call successors, (13986) [2021-11-21 01:11:45,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54052 states to 54052 states and 91745 transitions. [2021-11-21 01:11:45,544 INFO L78 Accepts]: Start accepts. Automaton has 54052 states and 91745 transitions. Word has length 73 [2021-11-21 01:11:45,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:45,545 INFO L470 AbstractCegarLoop]: Abstraction has 54052 states and 91745 transitions. [2021-11-21 01:11:45,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:11:45,545 INFO L276 IsEmpty]: Start isEmpty. Operand 54052 states and 91745 transitions. [2021-11-21 01:11:45,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 01:11:45,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:45,547 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] [2021-11-21 01:11:45,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:11:45,547 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:11:45,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:45,548 INFO L85 PathProgramCache]: Analyzing trace with hash -940800881, now seen corresponding path program 1 times [2021-11-21 01:11:45,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:45,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507806945] [2021-11-21 01:11:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:45,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:11:45,627 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:45,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507806945] [2021-11-21 01:11:45,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507806945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:45,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:45,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:11:45,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715531096] [2021-11-21 01:11:45,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:45,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:11:45,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:45,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:11:45,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:11:45,629 INFO L87 Difference]: Start difference. First operand 54052 states and 91745 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:11:50,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:50,937 INFO L93 Difference]: Finished difference Result 195177 states and 351170 transitions. [2021-11-21 01:11:50,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:11:50,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 73 [2021-11-21 01:11:50,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:51,956 INFO L225 Difference]: With dead ends: 195177 [2021-11-21 01:11:51,957 INFO L226 Difference]: Without dead ends: 141130 [2021-11-21 01:11:52,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:11:52,162 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 1101 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:52,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1122 Valid, 1208 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:11:52,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141130 states. [2021-11-21 01:11:59,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141130 to 134828. [2021-11-21 01:11:59,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134828 states, 119193 states have (on average 1.5529854941145873) internal successors, (185105), 113668 states have internal predecessors, (185105), 9994 states have call successors, (9994), 3960 states have call predecessors, (9994), 5640 states have return successors, (40894), 17200 states have call predecessors, (40894), 9994 states have call successors, (40894) [2021-11-21 01:12:00,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134828 states to 134828 states and 235993 transitions. [2021-11-21 01:12:00,610 INFO L78 Accepts]: Start accepts. Automaton has 134828 states and 235993 transitions. Word has length 73 [2021-11-21 01:12:00,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:12:00,611 INFO L470 AbstractCegarLoop]: Abstraction has 134828 states and 235993 transitions. [2021-11-21 01:12:00,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:12:00,611 INFO L276 IsEmpty]: Start isEmpty. Operand 134828 states and 235993 transitions. [2021-11-21 01:12:00,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-21 01:12:00,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:12:00,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:12:00,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:12:00,615 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:12:00,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:12:00,616 INFO L85 PathProgramCache]: Analyzing trace with hash 606133631, now seen corresponding path program 1 times [2021-11-21 01:12:00,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:12:00,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668638314] [2021-11-21 01:12:00,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:00,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:12:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:00,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:12:00,713 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:12:00,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668638314] [2021-11-21 01:12:00,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668638314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:12:00,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:12:00,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:12:00,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171744873] [2021-11-21 01:12:00,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:12:00,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:12:00,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:12:00,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:12:00,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:12:00,716 INFO L87 Difference]: Start difference. First operand 134828 states and 235993 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 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) [2021-11-21 01:12:09,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:12:09,223 INFO L93 Difference]: Finished difference Result 380015 states and 667814 transitions. [2021-11-21 01:12:09,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:12:09,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 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 76 [2021-11-21 01:12:09,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:12:10,805 INFO L225 Difference]: With dead ends: 380015 [2021-11-21 01:12:10,806 INFO L226 Difference]: Without dead ends: 245193 [2021-11-21 01:12:11,117 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 [2021-11-21 01:12:11,117 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 1021 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:12:11,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1028 Valid, 662 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:12:11,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245193 states.