./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.16.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e8ec5d-ebaa-438f-87ba-e2331b879f39/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e8ec5d-ebaa-438f-87ba-e2331b879f39/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e8ec5d-ebaa-438f-87ba-e2331b879f39/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e8ec5d-ebaa-438f-87ba-e2331b879f39/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.16.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e8ec5d-ebaa-438f-87ba-e2331b879f39/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e8ec5d-ebaa-438f-87ba-e2331b879f39/bin/utaipan-UbGMyvGFUs --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 45519c8273c53879cf6a170ed74d5bc0be814b1f3243ce6c30d1d3efe9a3cf32 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:44:32,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:44:32,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:44:32,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:44:32,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:44:32,860 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:44:32,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:44:32,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:44:32,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:44:32,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:44:32,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:44:32,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:44:32,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:44:32,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:44:32,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:44:32,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:44:32,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:44:32,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:44:32,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:44:32,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:44:32,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:44:32,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:44:32,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:44:32,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:44:32,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:44:32,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:44:32,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:44:32,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:44:32,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:44:32,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:44:32,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:44:32,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:44:32,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:44:32,905 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:44:32,907 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:44:32,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:44:32,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:44:32,910 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:44:32,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:44:32,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:44:32,912 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:44:32,913 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e8ec5d-ebaa-438f-87ba-e2331b879f39/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:44:32,965 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:44:32,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:44:32,967 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:44:32,967 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:44:32,967 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:44:32,967 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:44:32,968 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:44:32,968 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:44:32,968 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:44:32,968 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:44:32,969 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:44:32,969 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:44:32,969 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:44:32,969 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:44:32,970 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:44:32,970 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:44:32,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:44:32,971 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:44:32,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:44:32,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:44:32,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:44:32,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:44:32,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:44:32,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:44:32,973 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:44:32,973 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:44:32,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:44:32,973 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:44:32,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:44:32,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:44:32,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:44:32,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:44:32,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:44:32,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:44:32,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:44:32,976 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:44:32,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:44:32,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:44:32,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:44:32,977 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:44:32,977 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_50e8ec5d-ebaa-438f-87ba-e2331b879f39/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e8ec5d-ebaa-438f-87ba-e2331b879f39/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45519c8273c53879cf6a170ed74d5bc0be814b1f3243ce6c30d1d3efe9a3cf32 [2021-11-19 15:44:33,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:44:33,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:44:33,278 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:44:33,279 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:44:33,280 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:44:33,282 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e8ec5d-ebaa-438f-87ba-e2331b879f39/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/systemc/transmitter.16.cil.c [2021-11-19 15:44:33,359 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e8ec5d-ebaa-438f-87ba-e2331b879f39/bin/utaipan-UbGMyvGFUs/data/a28474788/939a6641fac04b1dae13cfbf2e94c554/FLAG44cc7298d [2021-11-19 15:44:33,880 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:44:33,881 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e8ec5d-ebaa-438f-87ba-e2331b879f39/sv-benchmarks/c/systemc/transmitter.16.cil.c [2021-11-19 15:44:33,902 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e8ec5d-ebaa-438f-87ba-e2331b879f39/bin/utaipan-UbGMyvGFUs/data/a28474788/939a6641fac04b1dae13cfbf2e94c554/FLAG44cc7298d [2021-11-19 15:44:34,212 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e8ec5d-ebaa-438f-87ba-e2331b879f39/bin/utaipan-UbGMyvGFUs/data/a28474788/939a6641fac04b1dae13cfbf2e94c554 [2021-11-19 15:44:34,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:44:34,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:44:34,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:44:34,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:44:34,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:44:34,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:44:34" (1/1) ... [2021-11-19 15:44:34,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a10e3f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:34, skipping insertion in model container [2021-11-19 15:44:34,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:44:34" (1/1) ... [2021-11-19 15:44:34,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:44:34,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:44:34,484 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_50e8ec5d-ebaa-438f-87ba-e2331b879f39/sv-benchmarks/c/systemc/transmitter.16.cil.c[706,719] [2021-11-19 15:44:34,694 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:44:34,706 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:44:34,722 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_50e8ec5d-ebaa-438f-87ba-e2331b879f39/sv-benchmarks/c/systemc/transmitter.16.cil.c[706,719] [2021-11-19 15:44:34,824 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:44:34,856 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:44:34,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:34 WrapperNode [2021-11-19 15:44:34,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:44:34,858 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:44:34,858 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:44:34,858 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:44:34,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:34" (1/1) ... [2021-11-19 15:44:34,883 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:34" (1/1) ... [2021-11-19 15:44:34,939 INFO L137 Inliner]: procedures = 56, calls = 71, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 945 [2021-11-19 15:44:34,939 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:44:34,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:44:34,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:44:34,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:44:34,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:34" (1/1) ... [2021-11-19 15:44:34,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:34" (1/1) ... [2021-11-19 15:44:34,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:34" (1/1) ... [2021-11-19 15:44:34,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:34" (1/1) ... [2021-11-19 15:44:34,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:34" (1/1) ... [2021-11-19 15:44:35,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:34" (1/1) ... [2021-11-19 15:44:35,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:34" (1/1) ... [2021-11-19 15:44:35,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:44:35,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:44:35,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:44:35,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:44:35,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:34" (1/1) ... [2021-11-19 15:44:35,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:44:35,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e8ec5d-ebaa-438f-87ba-e2331b879f39/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:44:35,062 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e8ec5d-ebaa-438f-87ba-e2331b879f39/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:44:35,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50e8ec5d-ebaa-438f-87ba-e2331b879f39/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:44:35,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:44:35,118 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-19 15:44:35,118 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-19 15:44:35,118 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-19 15:44:35,119 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-19 15:44:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-19 15:44:35,119 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-19 15:44:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-19 15:44:35,119 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-19 15:44:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-19 15:44:35,119 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-19 15:44:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-19 15:44:35,120 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-19 15:44:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 15:44:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:44:35,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:44:35,302 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:44:35,304 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:44:36,263 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:44:36,765 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:44:36,765 INFO L301 CfgBuilder]: Removed 18 assume(true) statements. [2021-11-19 15:44:36,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:44:36 BoogieIcfgContainer [2021-11-19 15:44:36,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:44:36,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:44:36,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:44:36,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:44:36,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:44:34" (1/3) ... [2021-11-19 15:44:36,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4615ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:44:36, skipping insertion in model container [2021-11-19 15:44:36,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:34" (2/3) ... [2021-11-19 15:44:36,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4615ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:44:36, skipping insertion in model container [2021-11-19 15:44:36,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:44:36" (3/3) ... [2021-11-19 15:44:36,806 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.16.cil.c [2021-11-19 15:44:36,812 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:44:36,813 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:44:36,884 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:44:36,890 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 [2021-11-19 15:44:36,891 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:44:36,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 197 states, 163 states have (on average 1.5521472392638036) internal successors, (253), 165 states have internal predecessors, (253), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-19 15:44:36,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 15:44:36,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:36,941 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] [2021-11-19 15:44:36,942 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:44:36,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:36,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1439967137, now seen corresponding path program 1 times [2021-11-19 15:44:36,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:44:36,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383645283] [2021-11-19 15:44:36,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:36,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:44:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:44:37,390 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:44:37,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383645283] [2021-11-19 15:44:37,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383645283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:37,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:44:37,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 15:44:37,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102936421] [2021-11-19 15:44:37,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:37,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:44:37,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:44:37,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:44:37,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:44:37,430 INFO L87 Difference]: Start difference. First operand has 197 states, 163 states have (on average 1.5521472392638036) internal successors, (253), 165 states have internal predecessors, (253), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2021-11-19 15:44:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:37,917 INFO L93 Difference]: Finished difference Result 578 states and 911 transitions. [2021-11-19 15:44:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:44:37,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 70 [2021-11-19 15:44:37,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:37,934 INFO L225 Difference]: With dead ends: 578 [2021-11-19 15:44:37,934 INFO L226 Difference]: Without dead ends: 382 [2021-11-19 15:44:37,941 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 [2021-11-19 15:44:37,945 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 533 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:37,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 850 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 15:44:37,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-19 15:44:38,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 378. [2021-11-19 15:44:38,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 317 states have (on average 1.5173501577287065) internal successors, (481), 319 states have internal predecessors, (481), 48 states have call successors, (48), 12 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-19 15:44:38,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 577 transitions. [2021-11-19 15:44:38,051 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 577 transitions. Word has length 70 [2021-11-19 15:44:38,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:38,052 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 577 transitions. [2021-11-19 15:44:38,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2021-11-19 15:44:38,052 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 577 transitions. [2021-11-19 15:44:38,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 15:44:38,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:38,056 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] [2021-11-19 15:44:38,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 15:44:38,056 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:44:38,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:38,057 INFO L85 PathProgramCache]: Analyzing trace with hash -466517056, now seen corresponding path program 1 times [2021-11-19 15:44:38,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:44:38,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444588417] [2021-11-19 15:44:38,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:38,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:44:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:44:38,225 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:44:38,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444588417] [2021-11-19 15:44:38,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444588417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:38,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:44:38,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 15:44:38,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038827620] [2021-11-19 15:44:38,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:38,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:44:38,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:44:38,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:44:38,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:44:38,229 INFO L87 Difference]: Start difference. First operand 378 states and 577 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-19 15:44:39,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:39,309 INFO L93 Difference]: Finished difference Result 2209 states and 3569 transitions. [2021-11-19 15:44:39,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:44:39,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 70 [2021-11-19 15:44:39,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:39,341 INFO L225 Difference]: With dead ends: 2209 [2021-11-19 15:44:39,342 INFO L226 Difference]: Without dead ends: 1836 [2021-11-19 15:44:39,350 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 [2021-11-19 15:44:39,352 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 1393 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1409 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:39,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1409 Valid, 1179 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:44:39,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2021-11-19 15:44:39,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1798. [2021-11-19 15:44:39,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1525 states have (on average 1.5140983606557377) internal successors, (2309), 1533 states have internal predecessors, (2309), 212 states have call successors, (212), 60 states have call predecessors, (212), 60 states have return successors, (334), 205 states have call predecessors, (334), 212 states have call successors, (334) [2021-11-19 15:44:39,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2855 transitions. [2021-11-19 15:44:39,547 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2855 transitions. Word has length 70 [2021-11-19 15:44:39,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:39,548 INFO L470 AbstractCegarLoop]: Abstraction has 1798 states and 2855 transitions. [2021-11-19 15:44:39,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-19 15:44:39,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2855 transitions. [2021-11-19 15:44:39,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 15:44:39,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:39,551 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] [2021-11-19 15:44:39,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 15:44:39,552 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:44:39,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:39,553 INFO L85 PathProgramCache]: Analyzing trace with hash -363715809, now seen corresponding path program 1 times [2021-11-19 15:44:39,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:44:39,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146012733] [2021-11-19 15:44:39,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:39,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:44:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:44:39,694 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:44:39,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146012733] [2021-11-19 15:44:39,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146012733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:39,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:44:39,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 15:44:39,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862395137] [2021-11-19 15:44:39,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:39,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:44:39,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:44:39,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:44:39,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:44:39,699 INFO L87 Difference]: Start difference. First operand 1798 states and 2855 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-19 15:44:40,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:40,890 INFO L93 Difference]: Finished difference Result 7117 states and 11663 transitions. [2021-11-19 15:44:40,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:44:40,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 70 [2021-11-19 15:44:40,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:40,942 INFO L225 Difference]: With dead ends: 7117 [2021-11-19 15:44:40,942 INFO L226 Difference]: Without dead ends: 5324 [2021-11-19 15:44:40,956 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 [2021-11-19 15:44:40,957 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 1400 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1406 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:40,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1406 Valid, 1186 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:44:40,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5324 states. [2021-11-19 15:44:41,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5324 to 5012. [2021-11-19 15:44:41,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5012 states, 4361 states have (on average 1.5228158679202017) internal successors, (6641), 4295 states have internal predecessors, (6641), 486 states have call successors, (486), 148 states have call predecessors, (486), 164 states have return successors, (1016), 569 states have call predecessors, (1016), 486 states have call successors, (1016) [2021-11-19 15:44:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 8143 transitions. [2021-11-19 15:44:41,323 INFO L78 Accepts]: Start accepts. Automaton has 5012 states and 8143 transitions. Word has length 70 [2021-11-19 15:44:41,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:41,323 INFO L470 AbstractCegarLoop]: Abstraction has 5012 states and 8143 transitions. [2021-11-19 15:44:41,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-19 15:44:41,324 INFO L276 IsEmpty]: Start isEmpty. Operand 5012 states and 8143 transitions. [2021-11-19 15:44:41,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 15:44:41,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:41,326 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] [2021-11-19 15:44:41,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 15:44:41,327 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:44:41,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:41,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1830410272, now seen corresponding path program 1 times [2021-11-19 15:44:41,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:44:41,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006189318] [2021-11-19 15:44:41,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:41,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:44:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:44:41,448 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:44:41,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006189318] [2021-11-19 15:44:41,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006189318] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:41,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:44:41,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 15:44:41,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477632557] [2021-11-19 15:44:41,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:41,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:44:41,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:44:41,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:44:41,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:44:41,454 INFO L87 Difference]: Start difference. First operand 5012 states and 8143 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-19 15:44:42,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:42,917 INFO L93 Difference]: Finished difference Result 18573 states and 31325 transitions. [2021-11-19 15:44:42,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:44:42,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 70 [2021-11-19 15:44:42,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:43,065 INFO L225 Difference]: With dead ends: 18573 [2021-11-19 15:44:43,066 INFO L226 Difference]: Without dead ends: 13566 [2021-11-19 15:44:43,104 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 [2021-11-19 15:44:43,114 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 1364 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:43,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1383 Valid, 1225 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:44:43,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13566 states. [2021-11-19 15:44:44,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13566 to 12864. [2021-11-19 15:44:44,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12864 states, 11367 states have (on average 1.5308348728776282) internal successors, (17401), 11051 states have internal predecessors, (17401), 1076 states have call successors, (1076), 348 states have call predecessors, (1076), 420 states have return successors, (2912), 1465 states have call predecessors, (2912), 1076 states have call successors, (2912) [2021-11-19 15:44:44,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12864 states to 12864 states and 21389 transitions. [2021-11-19 15:44:44,136 INFO L78 Accepts]: Start accepts. Automaton has 12864 states and 21389 transitions. Word has length 70 [2021-11-19 15:44:44,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:44,136 INFO L470 AbstractCegarLoop]: Abstraction has 12864 states and 21389 transitions. [2021-11-19 15:44:44,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-19 15:44:44,137 INFO L276 IsEmpty]: Start isEmpty. Operand 12864 states and 21389 transitions. [2021-11-19 15:44:44,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 15:44:44,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:44,139 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] [2021-11-19 15:44:44,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 15:44:44,139 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:44:44,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:44,140 INFO L85 PathProgramCache]: Analyzing trace with hash 956932577, now seen corresponding path program 1 times [2021-11-19 15:44:44,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:44:44,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224803125] [2021-11-19 15:44:44,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:44,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:44:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:44:44,217 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:44:44,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224803125] [2021-11-19 15:44:44,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224803125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:44,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:44:44,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 15:44:44,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542817114] [2021-11-19 15:44:44,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:44,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:44:44,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:44:44,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:44:44,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:44:44,220 INFO L87 Difference]: Start difference. First operand 12864 states and 21389 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-19 15:44:46,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:46,724 INFO L93 Difference]: Finished difference Result 46885 states and 81599 transitions. [2021-11-19 15:44:46,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:44:46,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 70 [2021-11-19 15:44:46,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:47,024 INFO L225 Difference]: With dead ends: 46885 [2021-11-19 15:44:47,024 INFO L226 Difference]: Without dead ends: 34026 [2021-11-19 15:44:47,135 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 [2021-11-19 15:44:47,138 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 1341 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:47,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1361 Valid, 1252 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:44:47,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34026 states. [2021-11-19 15:44:49,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34026 to 32540. [2021-11-19 15:44:49,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32540 states, 29077 states have (on average 1.539945661519414) internal successors, (44777), 27971 states have internal predecessors, (44777), 2386 states have call successors, (2386), 820 states have call predecessors, (2386), 1076 states have return successors, (8280), 3749 states have call predecessors, (8280), 2386 states have call successors, (8280) [2021-11-19 15:44:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32540 states to 32540 states and 55443 transitions. [2021-11-19 15:44:49,647 INFO L78 Accepts]: Start accepts. Automaton has 32540 states and 55443 transitions. Word has length 70 [2021-11-19 15:44:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:49,648 INFO L470 AbstractCegarLoop]: Abstraction has 32540 states and 55443 transitions. [2021-11-19 15:44:49,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-19 15:44:49,649 INFO L276 IsEmpty]: Start isEmpty. Operand 32540 states and 55443 transitions. [2021-11-19 15:44:49,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 15:44:49,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:49,655 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] [2021-11-19 15:44:49,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 15:44:49,655 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:44:49,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:49,656 INFO L85 PathProgramCache]: Analyzing trace with hash 4194, now seen corresponding path program 1 times [2021-11-19 15:44:49,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:44:49,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937789211] [2021-11-19 15:44:49,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:49,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:44:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:44:49,764 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:44:49,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937789211] [2021-11-19 15:44:49,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937789211] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:49,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:44:49,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 15:44:49,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864728953] [2021-11-19 15:44:49,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:49,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:44:49,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:44:49,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:44:49,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:44:49,767 INFO L87 Difference]: Start difference. First operand 32540 states and 55443 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-19 15:44:53,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:53,680 INFO L93 Difference]: Finished difference Result 118557 states and 213161 transitions. [2021-11-19 15:44:53,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:44:53,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 70 [2021-11-19 15:44:53,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:54,326 INFO L225 Difference]: With dead ends: 118557 [2021-11-19 15:44:54,326 INFO L226 Difference]: Without dead ends: 86022 [2021-11-19 15:44:54,478 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 [2021-11-19 15:44:54,479 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 1318 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1339 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:54,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1339 Valid, 1279 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:44:54,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86022 states. [2021-11-19 15:44:59,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86022 to 82948. [2021-11-19 15:44:59,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82948 states, 74719 states have (on average 1.5505694669361207) internal successors, (115857), 71227 states have internal predecessors, (115857), 5408 states have call successors, (5408), 1980 states have call predecessors, (5408), 2820 states have return successors, (23664), 9741 states have call predecessors, (23664), 5408 states have call successors, (23664) [2021-11-19 15:44:59,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82948 states to 82948 states and 144929 transitions. [2021-11-19 15:44:59,954 INFO L78 Accepts]: Start accepts. Automaton has 82948 states and 144929 transitions. Word has length 70 [2021-11-19 15:44:59,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:59,955 INFO L470 AbstractCegarLoop]: Abstraction has 82948 states and 144929 transitions. [2021-11-19 15:44:59,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-19 15:44:59,955 INFO L276 IsEmpty]: Start isEmpty. Operand 82948 states and 144929 transitions. [2021-11-19 15:44:59,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 15:44:59,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:59,957 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] [2021-11-19 15:44:59,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 15:44:59,957 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:44:59,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:59,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1576553565, now seen corresponding path program 1 times [2021-11-19 15:44:59,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:44:59,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957267302] [2021-11-19 15:44:59,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:59,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:44:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:00,375 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:45:00,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957267302] [2021-11-19 15:45:00,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957267302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:00,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:00,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 15:45:00,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953108366] [2021-11-19 15:45:00,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:00,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:45:00,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:45:00,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:45:00,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:45:00,378 INFO L87 Difference]: Start difference. First operand 82948 states and 144929 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-19 15:45:07,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:07,815 INFO L93 Difference]: Finished difference Result 303477 states and 563595 transitions. [2021-11-19 15:45:07,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:45:07,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 70 [2021-11-19 15:45:07,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:09,556 INFO L225 Difference]: With dead ends: 303477 [2021-11-19 15:45:09,556 INFO L226 Difference]: Without dead ends: 220534 [2021-11-19 15:45:10,119 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 [2021-11-19 15:45:10,120 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 1295 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:10,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1317 Valid, 1306 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 15:45:10,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220534 states. [2021-11-19 15:45:21,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220534 to 214208. [2021-11-19 15:45:21,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214208 states, 193917 states have (on average 1.5628593676676104) internal successors, (303065), 183443 states have internal predecessors, (303065), 12686 states have call successors, (12686), 4948 states have call predecessors, (12686), 7604 states have return successors, (68104), 25817 states have call predecessors, (68104), 12686 states have call successors, (68104) [2021-11-19 15:45:23,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214208 states to 214208 states and 383855 transitions. [2021-11-19 15:45:23,254 INFO L78 Accepts]: Start accepts. Automaton has 214208 states and 383855 transitions. Word has length 70 [2021-11-19 15:45:23,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:23,255 INFO L470 AbstractCegarLoop]: Abstraction has 214208 states and 383855 transitions. [2021-11-19 15:45:23,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-19 15:45:23,256 INFO L276 IsEmpty]: Start isEmpty. Operand 214208 states and 383855 transitions. [2021-11-19 15:45:23,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 15:45:23,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:23,257 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] [2021-11-19 15:45:23,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 15:45:23,257 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:23,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:23,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1045896100, now seen corresponding path program 1 times [2021-11-19 15:45:23,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:45:23,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355460598] [2021-11-19 15:45:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:23,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:45:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:23,334 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:45:23,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355460598] [2021-11-19 15:45:23,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355460598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:23,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:23,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 15:45:23,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485922765] [2021-11-19 15:45:23,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:23,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:45:23,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:45:23,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:45:23,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:45:23,336 INFO L87 Difference]: Start difference. First operand 214208 states and 383855 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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)