./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.12.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae8c82f3-bb30-408e-b368-7047aa0f2a95/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae8c82f3-bb30-408e-b368-7047aa0f2a95/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae8c82f3-bb30-408e-b368-7047aa0f2a95/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae8c82f3-bb30-408e-b368-7047aa0f2a95/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.12.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae8c82f3-bb30-408e-b368-7047aa0f2a95/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae8c82f3-bb30-408e-b368-7047aa0f2a95/bin/utaipan-aC7eJsxGYH --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 77cf875508681ac6cd10c9abdb1e13245d05aed7023a63f25ccba3f799b7f1bf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:39:10,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:39:10,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:39:10,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:39:10,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:39:10,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:39:10,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:39:10,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:39:10,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:39:10,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:39:10,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:39:10,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:39:10,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:39:10,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:39:10,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:39:10,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:39:10,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:39:10,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:39:10,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:39:10,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:39:10,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:39:10,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:39:10,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:39:10,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:39:10,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:39:10,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:39:10,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:39:10,384 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:39:10,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:39:10,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:39:10,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:39:10,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:39:10,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:39:10,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:39:10,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:39:10,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:39:10,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:39:10,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:39:10,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:39:10,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:39:10,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:39:10,399 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae8c82f3-bb30-408e-b368-7047aa0f2a95/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:39:10,445 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:39:10,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:39:10,446 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:39:10,447 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:39:10,447 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:39:10,447 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:39:10,447 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:39:10,447 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:39:10,454 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:39:10,454 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:39:10,455 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:39:10,455 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:39:10,456 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:39:10,456 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:39:10,456 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:39:10,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:39:10,457 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:39:10,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:39:10,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:39:10,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:39:10,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:39:10,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:39:10,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:39:10,459 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:39:10,459 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:39:10,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:39:10,459 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:39:10,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:39:10,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:39:10,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:39:10,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:39:10,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:39:10,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:39:10,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:39:10,463 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:39:10,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:39:10,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:39:10,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:39:10,464 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:39:10,464 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_ae8c82f3-bb30-408e-b368-7047aa0f2a95/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae8c82f3-bb30-408e-b368-7047aa0f2a95/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77cf875508681ac6cd10c9abdb1e13245d05aed7023a63f25ccba3f799b7f1bf [2021-11-03 04:39:10,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:39:10,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:39:10,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:39:10,812 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:39:10,812 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:39:10,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae8c82f3-bb30-408e-b368-7047aa0f2a95/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/systemc/transmitter.12.cil.c [2021-11-03 04:39:10,881 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae8c82f3-bb30-408e-b368-7047aa0f2a95/bin/utaipan-aC7eJsxGYH/data/0639f83fd/983dda34107d4d388d24b7f30e2ccc24/FLAG30167bb24 [2021-11-03 04:39:11,460 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:39:11,461 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae8c82f3-bb30-408e-b368-7047aa0f2a95/sv-benchmarks/c/systemc/transmitter.12.cil.c [2021-11-03 04:39:11,478 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae8c82f3-bb30-408e-b368-7047aa0f2a95/bin/utaipan-aC7eJsxGYH/data/0639f83fd/983dda34107d4d388d24b7f30e2ccc24/FLAG30167bb24 [2021-11-03 04:39:11,755 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae8c82f3-bb30-408e-b368-7047aa0f2a95/bin/utaipan-aC7eJsxGYH/data/0639f83fd/983dda34107d4d388d24b7f30e2ccc24 [2021-11-03 04:39:11,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:39:11,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:39:11,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:39:11,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:39:11,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:39:11,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:39:11" (1/1) ... [2021-11-03 04:39:11,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d26f18d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:11, skipping insertion in model container [2021-11-03 04:39:11,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:39:11" (1/1) ... [2021-11-03 04:39:11,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:39:11,857 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:39:12,024 WARN L228 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_ae8c82f3-bb30-408e-b368-7047aa0f2a95/sv-benchmarks/c/systemc/transmitter.12.cil.c[401,414] [2021-11-03 04:39:12,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:39:12,171 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:39:12,182 WARN L228 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_ae8c82f3-bb30-408e-b368-7047aa0f2a95/sv-benchmarks/c/systemc/transmitter.12.cil.c[401,414] [2021-11-03 04:39:12,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:39:12,296 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:39:12,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:12 WrapperNode [2021-11-03 04:39:12,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:39:12,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:39:12,297 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:39:12,298 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:39:12,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:12" (1/1) ... [2021-11-03 04:39:12,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:12" (1/1) ... [2021-11-03 04:39:12,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:39:12,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:39:12,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:39:12,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:39:12,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:12" (1/1) ... [2021-11-03 04:39:12,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:12" (1/1) ... [2021-11-03 04:39:12,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:12" (1/1) ... [2021-11-03 04:39:12,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:12" (1/1) ... [2021-11-03 04:39:12,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:12" (1/1) ... [2021-11-03 04:39:12,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:12" (1/1) ... [2021-11-03 04:39:12,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:12" (1/1) ... [2021-11-03 04:39:12,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:39:12,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:39:12,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:39:12,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:39:12,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:12" (1/1) ... [2021-11-03 04:39:12,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:39:12,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae8c82f3-bb30-408e-b368-7047aa0f2a95/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:39:12,709 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae8c82f3-bb30-408e-b368-7047aa0f2a95/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:39:12,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae8c82f3-bb30-408e-b368-7047aa0f2a95/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:39:12,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:39:12,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:39:12,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:39:12,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:39:19,113 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:39:19,114 INFO L299 CfgBuilder]: Removed 524 assume(true) statements. [2021-11-03 04:39:19,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:39:19 BoogieIcfgContainer [2021-11-03 04:39:19,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:39:19,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:39:19,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:39:19,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:39:19,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:39:11" (1/3) ... [2021-11-03 04:39:19,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@552cf863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:39:19, skipping insertion in model container [2021-11-03 04:39:19,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:12" (2/3) ... [2021-11-03 04:39:19,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@552cf863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:39:19, skipping insertion in model container [2021-11-03 04:39:19,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:39:19" (3/3) ... [2021-11-03 04:39:19,129 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.12.cil.c [2021-11-03 04:39:19,134 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:39:19,134 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:39:19,199 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:39:19,205 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 [2021-11-03 04:39:19,205 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:39:19,250 INFO L276 IsEmpty]: Start isEmpty. Operand has 858 states, 856 states have (on average 1.5257009345794392) internal successors, (1306), 857 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:19,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:39:19,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:19,262 INFO L513 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] [2021-11-03 04:39:19,263 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:39:19,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:19,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1243385993, now seen corresponding path program 1 times [2021-11-03 04:39:19,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:39:19,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077594527] [2021-11-03 04:39:19,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:19,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:39:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:39:19,569 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:39:19,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077594527] [2021-11-03 04:39:19,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077594527] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:19,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:19,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:39:19,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129413467] [2021-11-03 04:39:19,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:39:19,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:39:19,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:39:19,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:39:19,602 INFO L87 Difference]: Start difference. First operand has 858 states, 856 states have (on average 1.5257009345794392) internal successors, (1306), 857 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:20,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:20,014 INFO L93 Difference]: Finished difference Result 3225 states and 4893 transitions. [2021-11-03 04:39:20,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:39:20,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 04:39:20,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:20,051 INFO L225 Difference]: With dead ends: 3225 [2021-11-03 04:39:20,051 INFO L226 Difference]: Without dead ends: 2363 [2021-11-03 04:39:20,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:39:20,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2021-11-03 04:39:20,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2259. [2021-11-03 04:39:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 2258 states have (on average 1.496014171833481) internal successors, (3378), 2258 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 3378 transitions. [2021-11-03 04:39:20,239 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 3378 transitions. Word has length 60 [2021-11-03 04:39:20,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:20,240 INFO L470 AbstractCegarLoop]: Abstraction has 2259 states and 3378 transitions. [2021-11-03 04:39:20,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:20,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 3378 transitions. [2021-11-03 04:39:20,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:39:20,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:20,252 INFO L513 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] [2021-11-03 04:39:20,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:39:20,252 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:39:20,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:20,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1235635434, now seen corresponding path program 1 times [2021-11-03 04:39:20,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:39:20,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765738237] [2021-11-03 04:39:20,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:20,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:39:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:39:20,359 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:39:20,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765738237] [2021-11-03 04:39:20,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765738237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:20,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:20,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:39:20,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243375215] [2021-11-03 04:39:20,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:39:20,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:39:20,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:39:20,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:39:20,363 INFO L87 Difference]: Start difference. First operand 2259 states and 3378 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:20,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:20,783 INFO L93 Difference]: Finished difference Result 8632 states and 12873 transitions. [2021-11-03 04:39:20,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:39:20,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 04:39:20,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:20,819 INFO L225 Difference]: With dead ends: 8632 [2021-11-03 04:39:20,819 INFO L226 Difference]: Without dead ends: 6385 [2021-11-03 04:39:20,824 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:39:20,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6385 states. [2021-11-03 04:39:21,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6385 to 6148. [2021-11-03 04:39:21,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6148 states, 6147 states have (on average 1.475191150154547) internal successors, (9068), 6147 states have internal predecessors, (9068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:21,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6148 states to 6148 states and 9068 transitions. [2021-11-03 04:39:21,093 INFO L78 Accepts]: Start accepts. Automaton has 6148 states and 9068 transitions. Word has length 60 [2021-11-03 04:39:21,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:21,094 INFO L470 AbstractCegarLoop]: Abstraction has 6148 states and 9068 transitions. [2021-11-03 04:39:21,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:21,094 INFO L276 IsEmpty]: Start isEmpty. Operand 6148 states and 9068 transitions. [2021-11-03 04:39:21,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:39:21,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:21,096 INFO L513 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] [2021-11-03 04:39:21,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 04:39:21,097 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:39:21,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:21,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1328994805, now seen corresponding path program 1 times [2021-11-03 04:39:21,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:39:21,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649381002] [2021-11-03 04:39:21,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:21,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:39:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:39:21,221 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:39:21,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649381002] [2021-11-03 04:39:21,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649381002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:21,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:21,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:39:21,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945711066] [2021-11-03 04:39:21,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:39:21,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:39:21,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:39:21,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:39:21,228 INFO L87 Difference]: Start difference. First operand 6148 states and 9068 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:21,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:21,957 INFO L93 Difference]: Finished difference Result 23592 states and 34704 transitions. [2021-11-03 04:39:21,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:39:21,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 04:39:21,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:22,051 INFO L225 Difference]: With dead ends: 23592 [2021-11-03 04:39:22,052 INFO L226 Difference]: Without dead ends: 17463 [2021-11-03 04:39:22,060 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:39:22,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17463 states. [2021-11-03 04:39:22,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17463 to 16933. [2021-11-03 04:39:22,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16933 states, 16932 states have (on average 1.4552326954878336) internal successors, (24640), 16932 states have internal predecessors, (24640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:22,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16933 states to 16933 states and 24640 transitions. [2021-11-03 04:39:22,836 INFO L78 Accepts]: Start accepts. Automaton has 16933 states and 24640 transitions. Word has length 60 [2021-11-03 04:39:22,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:22,837 INFO L470 AbstractCegarLoop]: Abstraction has 16933 states and 24640 transitions. [2021-11-03 04:39:22,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:22,837 INFO L276 IsEmpty]: Start isEmpty. Operand 16933 states and 24640 transitions. [2021-11-03 04:39:22,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:39:22,839 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:22,840 INFO L513 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] [2021-11-03 04:39:22,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 04:39:22,840 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:39:22,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:22,841 INFO L85 PathProgramCache]: Analyzing trace with hash 53892116, now seen corresponding path program 1 times [2021-11-03 04:39:22,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:39:22,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755552982] [2021-11-03 04:39:22,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:22,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:39:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:39:22,934 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:39:22,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755552982] [2021-11-03 04:39:22,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755552982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:22,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:22,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:39:22,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252720196] [2021-11-03 04:39:22,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:39:22,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:39:22,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:39:22,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:39:22,939 INFO L87 Difference]: Start difference. First operand 16933 states and 24640 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:24,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:24,266 INFO L93 Difference]: Finished difference Result 64891 states and 94185 transitions. [2021-11-03 04:39:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:39:24,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 04:39:24,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:24,400 INFO L225 Difference]: With dead ends: 64891 [2021-11-03 04:39:24,400 INFO L226 Difference]: Without dead ends: 47984 [2021-11-03 04:39:24,551 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:39:24,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47984 states. [2021-11-03 04:39:25,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47984 to 46834. [2021-11-03 04:39:25,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46834 states, 46833 states have (on average 1.4360813955971217) internal successors, (67256), 46833 states have internal predecessors, (67256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:26,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46834 states to 46834 states and 67256 transitions. [2021-11-03 04:39:26,006 INFO L78 Accepts]: Start accepts. Automaton has 46834 states and 67256 transitions. Word has length 60 [2021-11-03 04:39:26,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:26,007 INFO L470 AbstractCegarLoop]: Abstraction has 46834 states and 67256 transitions. [2021-11-03 04:39:26,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:26,008 INFO L276 IsEmpty]: Start isEmpty. Operand 46834 states and 67256 transitions. [2021-11-03 04:39:26,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:39:26,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:26,011 INFO L513 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] [2021-11-03 04:39:26,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 04:39:26,012 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:39:26,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:26,012 INFO L85 PathProgramCache]: Analyzing trace with hash 577212787, now seen corresponding path program 1 times [2021-11-03 04:39:26,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:39:26,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058180387] [2021-11-03 04:39:26,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:26,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:39:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:39:26,066 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:39:26,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058180387] [2021-11-03 04:39:26,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058180387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:26,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:26,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:39:26,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931907864] [2021-11-03 04:39:26,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:39:26,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:39:26,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:39:26,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:39:26,069 INFO L87 Difference]: Start difference. First operand 46834 states and 67256 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:29,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:29,013 INFO L93 Difference]: Finished difference Result 179086 states and 256574 transitions. [2021-11-03 04:39:29,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:39:29,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 04:39:29,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:29,383 INFO L225 Difference]: With dead ends: 179086 [2021-11-03 04:39:29,383 INFO L226 Difference]: Without dead ends: 132281 [2021-11-03 04:39:29,631 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:39:29,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132281 states. [2021-11-03 04:39:32,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132281 to 129607. [2021-11-03 04:39:32,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129607 states, 129606 states have (on average 1.4176504174189466) internal successors, (183736), 129606 states have internal predecessors, (183736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:33,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129607 states to 129607 states and 183736 transitions. [2021-11-03 04:39:33,318 INFO L78 Accepts]: Start accepts. Automaton has 129607 states and 183736 transitions. Word has length 60 [2021-11-03 04:39:33,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:33,319 INFO L470 AbstractCegarLoop]: Abstraction has 129607 states and 183736 transitions. [2021-11-03 04:39:33,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:33,319 INFO L276 IsEmpty]: Start isEmpty. Operand 129607 states and 183736 transitions. [2021-11-03 04:39:33,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:39:33,321 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:33,321 INFO L513 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] [2021-11-03 04:39:33,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 04:39:33,322 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:39:33,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:33,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1628661876, now seen corresponding path program 1 times [2021-11-03 04:39:33,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:39:33,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701055931] [2021-11-03 04:39:33,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:33,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:39:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:39:33,374 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:39:33,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701055931] [2021-11-03 04:39:33,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701055931] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:33,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:33,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:39:33,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339063646] [2021-11-03 04:39:33,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:39:33,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:39:33,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:39:33,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:39:33,377 INFO L87 Difference]: Start difference. First operand 129607 states and 183736 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:40,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:40,212 INFO L93 Difference]: Finished difference Result 492885 states and 697171 transitions. [2021-11-03 04:39:40,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:39:40,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 04:39:40,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:40,963 INFO L225 Difference]: With dead ends: 492885 [2021-11-03 04:39:40,963 INFO L226 Difference]: Without dead ends: 363314 [2021-11-03 04:39:41,122 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:39:41,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363314 states. [2021-11-03 04:39:49,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363314 to 358140. [2021-11-03 04:39:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358140 states, 358139 states have (on average 1.3998922206182516) internal successors, (501356), 358139 states have internal predecessors, (501356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:51,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358140 states to 358140 states and 501356 transitions. [2021-11-03 04:39:51,670 INFO L78 Accepts]: Start accepts. Automaton has 358140 states and 501356 transitions. Word has length 60 [2021-11-03 04:39:51,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:51,671 INFO L470 AbstractCegarLoop]: Abstraction has 358140 states and 501356 transitions. [2021-11-03 04:39:51,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:51,672 INFO L276 IsEmpty]: Start isEmpty. Operand 358140 states and 501356 transitions. [2021-11-03 04:39:51,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:39:51,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:51,674 INFO L513 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] [2021-11-03 04:39:51,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 04:39:51,675 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:39:51,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:51,678 INFO L85 PathProgramCache]: Analyzing trace with hash 656987189, now seen corresponding path program 1 times [2021-11-03 04:39:51,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:39:51,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481860540] [2021-11-03 04:39:51,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:51,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:39:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:39:51,731 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:39:51,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481860540] [2021-11-03 04:39:51,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481860540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:51,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:51,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:39:51,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523528920] [2021-11-03 04:39:51,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:39:51,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:39:51,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:39:51,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:39:51,733 INFO L87 Difference]: Start difference. First operand 358140 states and 501356 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)