./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.08.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5bad7f7-184c-45ab-bca8-0a4e21e0a049/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5bad7f7-184c-45ab-bca8-0a4e21e0a049/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5bad7f7-184c-45ab-bca8-0a4e21e0a049/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5bad7f7-184c-45ab-bca8-0a4e21e0a049/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.08.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5bad7f7-184c-45ab-bca8-0a4e21e0a049/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5bad7f7-184c-45ab-bca8-0a4e21e0a049/bin/utaipan-eEHZpOm5b7 --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 d0fbb3eaba725aed5c3b8bf09c66f0f1daed4feeee0b9a3792dc033de334e501 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:55:04,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:55:04,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:55:04,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:55:04,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:55:04,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:55:04,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:55:04,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:55:04,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:55:04,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:55:04,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:55:04,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:55:04,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:55:04,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:55:04,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:55:04,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:55:04,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:55:04,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:55:05,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:55:05,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:55:05,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:55:05,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:55:05,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:55:05,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:55:05,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:55:05,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:55:05,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:55:05,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:55:05,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:55:05,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:55:05,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:55:05,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:55:05,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:55:05,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:55:05,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:55:05,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:55:05,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:55:05,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:55:05,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:55:05,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:55:05,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:55:05,050 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5bad7f7-184c-45ab-bca8-0a4e21e0a049/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 17:55:05,099 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:55:05,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:55:05,100 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:55:05,100 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:55:05,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:55:05,101 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:55:05,102 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:55:05,102 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:55:05,102 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:55:05,102 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:55:05,103 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:55:05,104 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:55:05,104 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:55:05,104 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:55:05,104 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:55:05,105 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:55:05,105 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:55:05,105 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:55:05,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:55:05,106 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:55:05,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:55:05,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:55:05,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:55:05,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:55:05,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:55:05,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:55:05,109 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:55:05,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:55:05,110 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:55:05,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:55:05,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:55:05,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:55:05,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:55:05,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:55:05,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:55:05,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:55:05,112 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:55:05,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:55:05,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:55:05,113 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:55:05,113 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:55:05,113 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_b5bad7f7-184c-45ab-bca8-0a4e21e0a049/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5bad7f7-184c-45ab-bca8-0a4e21e0a049/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0fbb3eaba725aed5c3b8bf09c66f0f1daed4feeee0b9a3792dc033de334e501 [2021-11-25 17:55:05,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:55:05,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:55:05,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:55:05,427 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:55:05,428 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:55:05,430 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5bad7f7-184c-45ab-bca8-0a4e21e0a049/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/systemc/transmitter.08.cil.c [2021-11-25 17:55:05,516 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5bad7f7-184c-45ab-bca8-0a4e21e0a049/bin/utaipan-eEHZpOm5b7/data/a93469583/4ebe851fad6042de9854d787718d7468/FLAG78dffae58 [2021-11-25 17:55:06,054 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:55:06,060 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5bad7f7-184c-45ab-bca8-0a4e21e0a049/sv-benchmarks/c/systemc/transmitter.08.cil.c [2021-11-25 17:55:06,086 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5bad7f7-184c-45ab-bca8-0a4e21e0a049/bin/utaipan-eEHZpOm5b7/data/a93469583/4ebe851fad6042de9854d787718d7468/FLAG78dffae58 [2021-11-25 17:55:06,368 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5bad7f7-184c-45ab-bca8-0a4e21e0a049/bin/utaipan-eEHZpOm5b7/data/a93469583/4ebe851fad6042de9854d787718d7468 [2021-11-25 17:55:06,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:55:06,372 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:55:06,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:55:06,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:55:06,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:55:06,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:55:06" (1/1) ... [2021-11-25 17:55:06,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f3b9d7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:55:06, skipping insertion in model container [2021-11-25 17:55:06,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:55:06" (1/1) ... [2021-11-25 17:55:06,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:55:06,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:55:06,637 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_b5bad7f7-184c-45ab-bca8-0a4e21e0a049/sv-benchmarks/c/systemc/transmitter.08.cil.c[706,719] [2021-11-25 17:55:06,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:55:06,803 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:55:06,815 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_b5bad7f7-184c-45ab-bca8-0a4e21e0a049/sv-benchmarks/c/systemc/transmitter.08.cil.c[706,719] [2021-11-25 17:55:06,859 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:55:06,879 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:55:06,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:55:06 WrapperNode [2021-11-25 17:55:06,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:55:06,881 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:55:06,882 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:55:06,882 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:55:06,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:55:06" (1/1) ... [2021-11-25 17:55:06,902 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:55:06" (1/1) ... [2021-11-25 17:55:06,947 INFO L137 Inliner]: procedures = 44, calls = 54, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 606 [2021-11-25 17:55:06,948 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:55:06,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:55:06,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:55:06,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:55:06,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:55:06" (1/1) ... [2021-11-25 17:55:06,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:55:06" (1/1) ... [2021-11-25 17:55:06,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:55:06" (1/1) ... [2021-11-25 17:55:06,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:55:06" (1/1) ... [2021-11-25 17:55:06,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:55:06" (1/1) ... [2021-11-25 17:55:06,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:55:06" (1/1) ... [2021-11-25 17:55:06,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:55:06" (1/1) ... [2021-11-25 17:55:07,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:55:07,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:55:07,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:55:07,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:55:07,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:55:06" (1/1) ... [2021-11-25 17:55:07,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:55:07,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5bad7f7-184c-45ab-bca8-0a4e21e0a049/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:55:07,038 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5bad7f7-184c-45ab-bca8-0a4e21e0a049/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:55:07,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5bad7f7-184c-45ab-bca8-0a4e21e0a049/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:55:07,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:55:07,110 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-25 17:55:07,110 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-25 17:55:07,110 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-25 17:55:07,110 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-25 17:55:07,110 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-25 17:55:07,111 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-25 17:55:07,111 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-25 17:55:07,111 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-25 17:55:07,111 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-25 17:55:07,111 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-25 17:55:07,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:55:07,112 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-25 17:55:07,112 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-25 17:55:07,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:55:07,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:55:07,247 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:55:07,249 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:55:07,949 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:55:08,296 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:55:08,296 INFO L301 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-25 17:55:08,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:55:08 BoogieIcfgContainer [2021-11-25 17:55:08,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:55:08,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:55:08,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:55:08,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:55:08,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:55:06" (1/3) ... [2021-11-25 17:55:08,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c806ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:55:08, skipping insertion in model container [2021-11-25 17:55:08,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:55:06" (2/3) ... [2021-11-25 17:55:08,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c806ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:55:08, skipping insertion in model container [2021-11-25 17:55:08,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:55:08" (3/3) ... [2021-11-25 17:55:08,308 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.08.cil.c [2021-11-25 17:55:08,313 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:55:08,314 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 17:55:08,363 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:55:08,370 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 [2021-11-25 17:55:08,371 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 17:55:08,391 INFO L276 IsEmpty]: Start isEmpty. Operand has 142 states, 113 states have (on average 1.5486725663716814) internal successors, (175), 115 states have internal predecessors, (175), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-25 17:55:08,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 17:55:08,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:55:08,402 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] [2021-11-25 17:55:08,403 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:55:08,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:55:08,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1115745721, now seen corresponding path program 1 times [2021-11-25 17:55:08,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:55:08,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477642755] [2021-11-25 17:55:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:55:08,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:55:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:08,769 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:55:08,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477642755] [2021-11-25 17:55:08,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477642755] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:55:08,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:55:08,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:55:08,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614196856] [2021-11-25 17:55:08,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:55:08,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:55:08,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:55:08,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:55:08,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:55:08,813 INFO L87 Difference]: Start difference. First operand has 142 states, 113 states have (on average 1.5486725663716814) internal successors, (175), 115 states have internal predecessors, (175), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-25 17:55:09,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:55:09,326 INFO L93 Difference]: Finished difference Result 413 states and 642 transitions. [2021-11-25 17:55:09,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:55:09,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 61 [2021-11-25 17:55:09,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:55:09,353 INFO L225 Difference]: With dead ends: 413 [2021-11-25 17:55:09,353 INFO L226 Difference]: Without dead ends: 272 [2021-11-25 17:55:09,363 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 [2021-11-25 17:55:09,369 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 375 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:55:09,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 578 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:55:09,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-25 17:55:09,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 268. [2021-11-25 17:55:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 217 states have (on average 1.4976958525345623) internal successors, (325), 219 states have internal predecessors, (325), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2021-11-25 17:55:09,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 401 transitions. [2021-11-25 17:55:09,469 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 401 transitions. Word has length 61 [2021-11-25 17:55:09,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:55:09,469 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 401 transitions. [2021-11-25 17:55:09,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-25 17:55:09,470 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 401 transitions. [2021-11-25 17:55:09,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 17:55:09,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:55:09,473 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] [2021-11-25 17:55:09,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:55:09,474 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:55:09,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:55:09,475 INFO L85 PathProgramCache]: Analyzing trace with hash -985095494, now seen corresponding path program 1 times [2021-11-25 17:55:09,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:55:09,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919891717] [2021-11-25 17:55:09,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:55:09,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:55:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:09,585 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:55:09,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919891717] [2021-11-25 17:55:09,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919891717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:55:09,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:55:09,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:55:09,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753291948] [2021-11-25 17:55:09,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:55:09,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:55:09,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:55:09,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:55:09,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:55:09,589 INFO L87 Difference]: Start difference. First operand 268 states and 401 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-11-25 17:55:10,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:55:10,454 INFO L93 Difference]: Finished difference Result 1549 states and 2443 transitions. [2021-11-25 17:55:10,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:55:10,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 61 [2021-11-25 17:55:10,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:55:10,470 INFO L225 Difference]: With dead ends: 1549 [2021-11-25 17:55:10,470 INFO L226 Difference]: Without dead ends: 1286 [2021-11-25 17:55:10,473 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 [2021-11-25 17:55:10,475 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 941 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 952 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:55:10,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [952 Valid, 809 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 17:55:10,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-11-25 17:55:10,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1250. [2021-11-25 17:55:10,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1027 states have (on average 1.49269717624148) internal successors, (1533), 1035 states have internal predecessors, (1533), 162 states have call successors, (162), 60 states have call predecessors, (162), 60 states have return successors, (244), 155 states have call predecessors, (244), 162 states have call successors, (244) [2021-11-25 17:55:10,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1939 transitions. [2021-11-25 17:55:10,599 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1939 transitions. Word has length 61 [2021-11-25 17:55:10,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:55:10,600 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1939 transitions. [2021-11-25 17:55:10,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-11-25 17:55:10,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1939 transitions. [2021-11-25 17:55:10,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 17:55:10,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:55:10,604 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] [2021-11-25 17:55:10,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 17:55:10,605 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:55:10,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:55:10,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1858573189, now seen corresponding path program 1 times [2021-11-25 17:55:10,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:55:10,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409081717] [2021-11-25 17:55:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:55:10,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:55:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:10,695 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:55:10,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409081717] [2021-11-25 17:55:10,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409081717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:55:10,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:55:10,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:55:10,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098697057] [2021-11-25 17:55:10,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:55:10,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:55:10,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:55:10,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:55:10,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:55:10,698 INFO L87 Difference]: Start difference. First operand 1250 states and 1939 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-11-25 17:55:11,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:55:11,631 INFO L93 Difference]: Finished difference Result 4923 states and 7865 transitions. [2021-11-25 17:55:11,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:55:11,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 61 [2021-11-25 17:55:11,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:55:11,674 INFO L225 Difference]: With dead ends: 4923 [2021-11-25 17:55:11,674 INFO L226 Difference]: Without dead ends: 3678 [2021-11-25 17:55:11,685 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 [2021-11-25 17:55:11,698 INFO L933 BasicCegarLoop]: 399 mSDtfsCounter, 943 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:55:11,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 816 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 17:55:11,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2021-11-25 17:55:12,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 3416. [2021-11-25 17:55:12,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 2875 states have (on average 1.5057391304347827) internal successors, (4329), 2849 states have internal predecessors, (4329), 376 states have call successors, (376), 148 states have call predecessors, (376), 164 states have return successors, (726), 419 states have call predecessors, (726), 376 states have call successors, (726) [2021-11-25 17:55:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 5431 transitions. [2021-11-25 17:55:12,063 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 5431 transitions. Word has length 61 [2021-11-25 17:55:12,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:55:12,064 INFO L470 AbstractCegarLoop]: Abstraction has 3416 states and 5431 transitions. [2021-11-25 17:55:12,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-11-25 17:55:12,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 5431 transitions. [2021-11-25 17:55:12,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 17:55:12,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:55:12,073 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] [2021-11-25 17:55:12,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 17:55:12,074 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:55:12,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:55:12,075 INFO L85 PathProgramCache]: Analyzing trace with hash 280879706, now seen corresponding path program 1 times [2021-11-25 17:55:12,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:55:12,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371086232] [2021-11-25 17:55:12,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:55:12,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:55:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:12,216 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:55:12,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371086232] [2021-11-25 17:55:12,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371086232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:55:12,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:55:12,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:55:12,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258600395] [2021-11-25 17:55:12,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:55:12,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:55:12,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:55:12,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:55:12,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:55:12,220 INFO L87 Difference]: Start difference. First operand 3416 states and 5431 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-11-25 17:55:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:55:13,403 INFO L93 Difference]: Finished difference Result 12583 states and 20719 transitions. [2021-11-25 17:55:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:55:13,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 61 [2021-11-25 17:55:13,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:55:13,514 INFO L225 Difference]: With dead ends: 12583 [2021-11-25 17:55:13,514 INFO L226 Difference]: Without dead ends: 9172 [2021-11-25 17:55:13,541 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 [2021-11-25 17:55:13,552 INFO L933 BasicCegarLoop]: 413 mSDtfsCounter, 912 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:55:13,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [926 Valid, 850 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 17:55:13,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9172 states. [2021-11-25 17:55:14,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9172 to 8584. [2021-11-25 17:55:14,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8584 states, 7317 states have (on average 1.5176985103184366) internal successors, (11105), 7181 states have internal predecessors, (11105), 846 states have call successors, (846), 348 states have call predecessors, (846), 420 states have return successors, (2042), 1055 states have call predecessors, (2042), 846 states have call successors, (2042) [2021-11-25 17:55:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8584 states to 8584 states and 13993 transitions. [2021-11-25 17:55:14,378 INFO L78 Accepts]: Start accepts. Automaton has 8584 states and 13993 transitions. Word has length 61 [2021-11-25 17:55:14,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:55:14,379 INFO L470 AbstractCegarLoop]: Abstraction has 8584 states and 13993 transitions. [2021-11-25 17:55:14,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-11-25 17:55:14,380 INFO L276 IsEmpty]: Start isEmpty. Operand 8584 states and 13993 transitions. [2021-11-25 17:55:14,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 17:55:14,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:55:14,384 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] [2021-11-25 17:55:14,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 17:55:14,385 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:55:14,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:55:14,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1483936903, now seen corresponding path program 1 times [2021-11-25 17:55:14,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:55:14,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999949128] [2021-11-25 17:55:14,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:55:14,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:55:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:14,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:55:14,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999949128] [2021-11-25 17:55:14,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999949128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:55:14,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:55:14,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:55:14,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837983324] [2021-11-25 17:55:14,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:55:14,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:55:14,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:55:14,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:55:14,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:55:14,550 INFO L87 Difference]: Start difference. First operand 8584 states and 13993 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-11-25 17:55:16,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:55:16,482 INFO L93 Difference]: Finished difference Result 30951 states and 52709 transitions. [2021-11-25 17:55:16,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:55:16,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 61 [2021-11-25 17:55:16,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:55:16,761 INFO L225 Difference]: With dead ends: 30951 [2021-11-25 17:55:16,762 INFO L226 Difference]: Without dead ends: 22372 [2021-11-25 17:55:16,903 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 [2021-11-25 17:55:16,909 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 889 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:55:16,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 877 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 17:55:16,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22372 states. [2021-11-25 17:55:18,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22372 to 21128. [2021-11-25 17:55:18,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21128 states, 18135 states have (on average 1.5316790736145576) internal successors, (27777), 17669 states have internal predecessors, (27777), 1916 states have call successors, (1916), 820 states have call predecessors, (1916), 1076 states have return successors, (5710), 2639 states have call predecessors, (5710), 1916 states have call successors, (5710) [2021-11-25 17:55:18,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21128 states to 21128 states and 35403 transitions. [2021-11-25 17:55:18,498 INFO L78 Accepts]: Start accepts. Automaton has 21128 states and 35403 transitions. Word has length 61 [2021-11-25 17:55:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:55:18,499 INFO L470 AbstractCegarLoop]: Abstraction has 21128 states and 35403 transitions. [2021-11-25 17:55:18,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-11-25 17:55:18,500 INFO L276 IsEmpty]: Start isEmpty. Operand 21128 states and 35403 transitions. [2021-11-25 17:55:18,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 17:55:18,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:55:18,502 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] [2021-11-25 17:55:18,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 17:55:18,503 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:55:18,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:55:18,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1541081128, now seen corresponding path program 1 times [2021-11-25 17:55:18,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:55:18,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814876683] [2021-11-25 17:55:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:55:18,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:55:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:18,651 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:55:18,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814876683] [2021-11-25 17:55:18,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814876683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:55:18,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:55:18,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:55:18,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499467472] [2021-11-25 17:55:18,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:55:18,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:55:18,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:55:18,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:55:18,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:55:18,654 INFO L87 Difference]: Start difference. First operand 21128 states and 35403 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2021-11-25 17:55:21,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:55:21,122 INFO L93 Difference]: Finished difference Result 60276 states and 101252 transitions. [2021-11-25 17:55:21,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 17:55:21,123 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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 61 [2021-11-25 17:55:21,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:55:21,374 INFO L225 Difference]: With dead ends: 60276 [2021-11-25 17:55:21,374 INFO L226 Difference]: Without dead ends: 39154 [2021-11-25 17:55:21,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 17:55:21,597 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 772 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:55:21,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 512 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:55:21,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39154 states. [2021-11-25 17:55:24,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39154 to 34038. [2021-11-25 17:55:24,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34038 states, 29329 states have (on average 1.5137236182617886) internal successors, (44396), 28702 states have internal predecessors, (44396), 2872 states have call successors, (2872), 1324 states have call predecessors, (2872), 1836 states have return successors, (8563), 4012 states have call predecessors, (8563), 2872 states have call successors, (8563) [2021-11-25 17:55:24,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34038 states to 34038 states and 55831 transitions. [2021-11-25 17:55:24,634 INFO L78 Accepts]: Start accepts. Automaton has 34038 states and 55831 transitions. Word has length 61 [2021-11-25 17:55:24,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:55:24,635 INFO L470 AbstractCegarLoop]: Abstraction has 34038 states and 55831 transitions. [2021-11-25 17:55:24,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2021-11-25 17:55:24,636 INFO L276 IsEmpty]: Start isEmpty. Operand 34038 states and 55831 transitions. [2021-11-25 17:55:24,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 17:55:24,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:55:24,638 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:55:24,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 17:55:24,638 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:55:24,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:55:24,639 INFO L85 PathProgramCache]: Analyzing trace with hash 479655206, now seen corresponding path program 1 times [2021-11-25 17:55:24,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:55:24,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557673987] [2021-11-25 17:55:24,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:55:24,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:55:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:24,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:55:24,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557673987] [2021-11-25 17:55:24,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557673987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:55:24,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:55:24,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:55:24,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210917319] [2021-11-25 17:55:24,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:55:24,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:55:24,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:55:24,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:55:24,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:55:24,741 INFO L87 Difference]: Start difference. First operand 34038 states and 55831 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-11-25 17:55:28,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:55:28,102 INFO L93 Difference]: Finished difference Result 107960 states and 176708 transitions. [2021-11-25 17:55:28,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 17:55:28,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 62 [2021-11-25 17:55:28,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:55:28,553 INFO L225 Difference]: With dead ends: 107960 [2021-11-25 17:55:28,554 INFO L226 Difference]: Without dead ends: 73928 [2021-11-25 17:55:28,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 17:55:28,844 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 696 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:55:28,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 525 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:55:28,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73928 states. [2021-11-25 17:55:32,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73928 to 62078. [2021-11-25 17:55:32,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62078 states, 53625 states have (on average 1.5112913752913752) internal successors, (81043), 52318 states have internal predecessors, (81043), 5068 states have call successors, (5068), 2348 states have call predecessors, (5068), 3384 states have return successors, (16046), 7412 states have call predecessors, (16046), 5068 states have call successors, (16046) [2021-11-25 17:55:33,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62078 states to 62078 states and 102157 transitions. [2021-11-25 17:55:33,143 INFO L78 Accepts]: Start accepts. Automaton has 62078 states and 102157 transitions. Word has length 62 [2021-11-25 17:55:33,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:55:33,145 INFO L470 AbstractCegarLoop]: Abstraction has 62078 states and 102157 transitions. [2021-11-25 17:55:33,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-11-25 17:55:33,145 INFO L276 IsEmpty]: Start isEmpty. Operand 62078 states and 102157 transitions. [2021-11-25 17:55:33,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-25 17:55:33,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:55:33,148 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] [2021-11-25 17:55:33,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 17:55:33,149 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:55:33,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:55:33,150 INFO L85 PathProgramCache]: Analyzing trace with hash 538184111, now seen corresponding path program 1 times [2021-11-25 17:55:33,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:55:33,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025501548] [2021-11-25 17:55:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:55:33,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:55:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:33,268 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:55:33,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025501548] [2021-11-25 17:55:33,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025501548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:55:33,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:55:33,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:55:33,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319704600] [2021-11-25 17:55:33,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:55:33,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:55:33,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:55:33,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:55:33,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:55:33,275 INFO L87 Difference]: Start difference. First operand 62078 states and 102157 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2021-11-25 17:55:38,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:55:38,150 INFO L93 Difference]: Finished difference Result 175423 states and 294597 transitions. [2021-11-25 17:55:38,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 17:55:38,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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 63 [2021-11-25 17:55:38,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:55:39,195 INFO L225 Difference]: With dead ends: 175423 [2021-11-25 17:55:39,195 INFO L226 Difference]: Without dead ends: 113351 [2021-11-25 17:55:39,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 17:55:39,394 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 641 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:55:39,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 555 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:55:39,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113351 states. [2021-11-25 17:55:44,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113351 to 97221. [2021-11-25 17:55:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97221 states, 83995 states have (on average 1.5123162092981726) internal successors, (127027), 82458 states have internal predecessors, (127027), 8053 states have call successors, (8053), 3832 states have call predecessors, (8053), 5172 states have return successors, (25856), 10931 states have call predecessors, (25856), 8053 states have call successors, (25856) [2021-11-25 17:55:45,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97221 states to 97221 states and 160936 transitions. [2021-11-25 17:55:45,540 INFO L78 Accepts]: Start accepts. Automaton has 97221 states and 160936 transitions. Word has length 63 [2021-11-25 17:55:45,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:55:45,541 INFO L470 AbstractCegarLoop]: Abstraction has 97221 states and 160936 transitions. [2021-11-25 17:55:45,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2021-11-25 17:55:45,542 INFO L276 IsEmpty]: Start isEmpty. Operand 97221 states and 160936 transitions. [2021-11-25 17:55:45,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-25 17:55:45,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:55:45,551 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] [2021-11-25 17:55:45,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 17:55:45,552 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:55:45,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:55:45,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1792666306, now seen corresponding path program 1 times [2021-11-25 17:55:45,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:55:45,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919337518] [2021-11-25 17:55:45,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:55:45,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:55:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:45,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:55:45,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919337518] [2021-11-25 17:55:45,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919337518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:55:45,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:55:45,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:55:45,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459180687] [2021-11-25 17:55:45,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:55:45,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:55:45,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:55:45,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:55:45,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:55:45,677 INFO L87 Difference]: Start difference. First operand 97221 states and 160936 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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) [2021-11-25 17:55:54,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:55:54,050 INFO L93 Difference]: Finished difference Result 274040 states and 464348 transitions. [2021-11-25 17:55:54,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 17:55:54,062 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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 64 [2021-11-25 17:55:54,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:55:55,306 INFO L225 Difference]: With dead ends: 274040 [2021-11-25 17:55:55,306 INFO L226 Difference]: Without dead ends: 176825 [2021-11-25 17:55:55,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 17:55:55,544 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 678 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:55:55,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 522 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:55:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176825 states.