./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label51.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d1fd059c-aa18-4dec-b179-e5051fb5a487/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d1fd059c-aa18-4dec-b179-e5051fb5a487/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d1fd059c-aa18-4dec-b179-e5051fb5a487/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d1fd059c-aa18-4dec-b179-e5051fb5a487/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label51.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d1fd059c-aa18-4dec-b179-e5051fb5a487/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d1fd059c-aa18-4dec-b179-e5051fb5a487/bin/utaipan --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 9b662101800a9cac954243c459de117719237e24 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:05:29,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:05:29,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:05:29,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:05:29,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:05:29,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:05:29,267 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:05:29,271 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:05:29,273 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:05:29,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:05:29,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:05:29,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:05:29,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:05:29,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:05:29,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:05:29,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:05:29,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:05:29,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:05:29,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:05:29,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:05:29,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:05:29,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:05:29,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:05:29,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:05:29,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:05:29,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:05:29,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:05:29,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:05:29,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:05:29,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:05:29,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:05:29,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:05:29,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:05:29,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:05:29,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:05:29,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:05:29,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:05:29,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:05:29,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:05:29,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:05:29,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:05:29,325 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d1fd059c-aa18-4dec-b179-e5051fb5a487/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:05:29,363 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:05:29,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:05:29,365 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:05:29,365 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:05:29,365 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:05:29,366 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:05:29,366 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:05:29,366 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:05:29,366 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:05:29,367 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:05:29,368 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:05:29,368 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:05:29,368 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:05:29,368 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:05:29,369 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:05:29,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:05:29,370 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:05:29,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:05:29,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:05:29,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:05:29,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:05:29,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:05:29,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:05:29,371 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:05:29,371 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:05:29,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:05:29,372 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:05:29,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:05:29,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:05:29,374 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:05:29,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:05:29,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:05:29,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:05:29,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:05:29,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:05:29,376 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:05:29,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:05:29,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:05:29,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:05:29,376 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:05:29,377 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-vcloud-master/worker/run_dir_d1fd059c-aa18-4dec-b179-e5051fb5a487/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d1fd059c-aa18-4dec-b179-e5051fb5a487/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b662101800a9cac954243c459de117719237e24 [2020-11-22 13:05:29,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:05:29,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:05:29,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:05:29,727 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:05:29,728 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:05:29,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d1fd059c-aa18-4dec-b179-e5051fb5a487/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label51.c [2020-11-22 13:05:29,808 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d1fd059c-aa18-4dec-b179-e5051fb5a487/bin/utaipan/data/05b0df297/2cb37c5821714909965691fdb0435827/FLAGa6f8128e9 [2020-11-22 13:05:30,464 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:05:30,464 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d1fd059c-aa18-4dec-b179-e5051fb5a487/sv-benchmarks/c/eca-rers2012/Problem01_label51.c [2020-11-22 13:05:30,493 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d1fd059c-aa18-4dec-b179-e5051fb5a487/bin/utaipan/data/05b0df297/2cb37c5821714909965691fdb0435827/FLAGa6f8128e9 [2020-11-22 13:05:30,724 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d1fd059c-aa18-4dec-b179-e5051fb5a487/bin/utaipan/data/05b0df297/2cb37c5821714909965691fdb0435827 [2020-11-22 13:05:30,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:05:30,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:05:30,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:05:30,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:05:30,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:05:30,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:05:30" (1/1) ... [2020-11-22 13:05:30,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e4aff27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:30, skipping insertion in model container [2020-11-22 13:05:30,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:05:30" (1/1) ... [2020-11-22 13:05:30,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:05:30,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:05:31,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:05:31,231 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:05:31,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:05:31,388 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:05:31,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:31 WrapperNode [2020-11-22 13:05:31,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:05:31,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:05:31,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:05:31,392 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:05:31,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:31" (1/1) ... [2020-11-22 13:05:31,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:31" (1/1) ... [2020-11-22 13:05:31,484 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:05:31,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:05:31,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:05:31,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:05:31,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:31" (1/1) ... [2020-11-22 13:05:31,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:31" (1/1) ... [2020-11-22 13:05:31,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:31" (1/1) ... [2020-11-22 13:05:31,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:31" (1/1) ... [2020-11-22 13:05:31,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:31" (1/1) ... [2020-11-22 13:05:31,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:31" (1/1) ... [2020-11-22 13:05:31,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:31" (1/1) ... [2020-11-22 13:05:31,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:05:31,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:05:31,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:05:31,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:05:31,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1fd059c-aa18-4dec-b179-e5051fb5a487/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:05:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:05:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:05:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:05:31,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:05:34,158 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:05:34,158 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-22 13:05:34,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:34 BoogieIcfgContainer [2020-11-22 13:05:34,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:05:34,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:05:34,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:05:34,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:05:34,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:05:30" (1/3) ... [2020-11-22 13:05:34,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25bf3a70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:05:34, skipping insertion in model container [2020-11-22 13:05:34,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:31" (2/3) ... [2020-11-22 13:05:34,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25bf3a70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:05:34, skipping insertion in model container [2020-11-22 13:05:34,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:34" (3/3) ... [2020-11-22 13:05:34,169 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label51.c [2020-11-22 13:05:34,180 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:05:34,184 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 13:05:34,196 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 13:05:34,232 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:05:34,232 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:05:34,233 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:05:34,233 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:05:34,233 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:05:34,233 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:05:34,234 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:05:34,234 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:05:34,251 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-22 13:05:34,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-22 13:05:34,257 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:34,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:34,258 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:34,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:34,264 INFO L82 PathProgramCache]: Analyzing trace with hash 2004384300, now seen corresponding path program 1 times [2020-11-22 13:05:34,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:34,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448281524] [2020-11-22 13:05:34,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:34,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448281524] [2020-11-22 13:05:34,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:34,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:05:34,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992104724] [2020-11-22 13:05:34,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:34,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:34,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:34,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:34,747 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-22 13:05:35,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:35,441 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-22 13:05:35,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:35,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-22 13:05:35,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:35,453 INFO L225 Difference]: With dead ends: 224 [2020-11-22 13:05:35,453 INFO L226 Difference]: Without dead ends: 145 [2020-11-22 13:05:35,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:35,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-22 13:05:35,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-22 13:05:35,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-22 13:05:35,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2020-11-22 13:05:35,502 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2020-11-22 13:05:35,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:35,503 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2020-11-22 13:05:35,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:35,503 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2020-11-22 13:05:35,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-22 13:05:35,507 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:35,507 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:35,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:05:35,508 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:35,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:35,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1988670015, now seen corresponding path program 1 times [2020-11-22 13:05:35,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:35,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75515411] [2020-11-22 13:05:35,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:35,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75515411] [2020-11-22 13:05:35,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:35,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:05:35,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037546196] [2020-11-22 13:05:35,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:35,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:35,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:35,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:35,581 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2020-11-22 13:05:36,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:36,150 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2020-11-22 13:05:36,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:36,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-11-22 13:05:36,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:36,154 INFO L225 Difference]: With dead ends: 431 [2020-11-22 13:05:36,154 INFO L226 Difference]: Without dead ends: 287 [2020-11-22 13:05:36,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:36,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-22 13:05:36,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-11-22 13:05:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-22 13:05:36,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 468 transitions. [2020-11-22 13:05:36,190 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 468 transitions. Word has length 77 [2020-11-22 13:05:36,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:36,191 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 468 transitions. [2020-11-22 13:05:36,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:36,191 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 468 transitions. [2020-11-22 13:05:36,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-22 13:05:36,198 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:36,198 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:36,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:05:36,198 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:36,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:36,199 INFO L82 PathProgramCache]: Analyzing trace with hash 2043360669, now seen corresponding path program 1 times [2020-11-22 13:05:36,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:36,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884483744] [2020-11-22 13:05:36,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:36,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884483744] [2020-11-22 13:05:36,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:36,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:05:36,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267154634] [2020-11-22 13:05:36,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:05:36,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:36,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:05:36,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:36,510 INFO L87 Difference]: Start difference. First operand 287 states and 468 transitions. Second operand 4 states. [2020-11-22 13:05:37,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:37,117 INFO L93 Difference]: Finished difference Result 784 states and 1255 transitions. [2020-11-22 13:05:37,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:05:37,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-11-22 13:05:37,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:37,121 INFO L225 Difference]: With dead ends: 784 [2020-11-22 13:05:37,121 INFO L226 Difference]: Without dead ends: 429 [2020-11-22 13:05:37,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:37,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-11-22 13:05:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 358. [2020-11-22 13:05:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-11-22 13:05:37,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 482 transitions. [2020-11-22 13:05:37,157 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 482 transitions. Word has length 78 [2020-11-22 13:05:37,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:37,157 INFO L481 AbstractCegarLoop]: Abstraction has 358 states and 482 transitions. [2020-11-22 13:05:37,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:05:37,158 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 482 transitions. [2020-11-22 13:05:37,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-22 13:05:37,160 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:37,160 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:37,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:05:37,161 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:37,161 INFO L82 PathProgramCache]: Analyzing trace with hash 2117707289, now seen corresponding path program 1 times [2020-11-22 13:05:37,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:37,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654226695] [2020-11-22 13:05:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:37,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654226695] [2020-11-22 13:05:37,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:37,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:05:37,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774382561] [2020-11-22 13:05:37,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:05:37,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:37,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:05:37,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:37,310 INFO L87 Difference]: Start difference. First operand 358 states and 482 transitions. Second operand 4 states. [2020-11-22 13:05:37,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:37,759 INFO L93 Difference]: Finished difference Result 928 states and 1284 transitions. [2020-11-22 13:05:37,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:05:37,760 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2020-11-22 13:05:37,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:37,763 INFO L225 Difference]: With dead ends: 928 [2020-11-22 13:05:37,763 INFO L226 Difference]: Without dead ends: 571 [2020-11-22 13:05:37,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:37,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-11-22 13:05:37,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2020-11-22 13:05:37,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-22 13:05:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 774 transitions. [2020-11-22 13:05:37,789 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 774 transitions. Word has length 86 [2020-11-22 13:05:37,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:37,790 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 774 transitions. [2020-11-22 13:05:37,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:05:37,790 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 774 transitions. [2020-11-22 13:05:37,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-22 13:05:37,792 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:37,792 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:37,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:05:37,793 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:37,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:37,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1196143196, now seen corresponding path program 1 times [2020-11-22 13:05:37,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:37,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713015292] [2020-11-22 13:05:37,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-22 13:05:37,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713015292] [2020-11-22 13:05:37,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:37,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:05:37,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293092340] [2020-11-22 13:05:37,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:37,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:37,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:37,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:37,851 INFO L87 Difference]: Start difference. First operand 571 states and 774 transitions. Second operand 3 states. [2020-11-22 13:05:38,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:38,185 INFO L93 Difference]: Finished difference Result 1496 states and 1992 transitions. [2020-11-22 13:05:38,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:38,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-11-22 13:05:38,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:38,190 INFO L225 Difference]: With dead ends: 1496 [2020-11-22 13:05:38,190 INFO L226 Difference]: Without dead ends: 926 [2020-11-22 13:05:38,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:38,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-11-22 13:05:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 713. [2020-11-22 13:05:38,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-11-22 13:05:38,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 952 transitions. [2020-11-22 13:05:38,218 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 952 transitions. Word has length 97 [2020-11-22 13:05:38,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:38,219 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 952 transitions. [2020-11-22 13:05:38,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:38,219 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 952 transitions. [2020-11-22 13:05:38,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-11-22 13:05:38,221 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:38,222 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:38,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:05:38,222 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:38,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:38,223 INFO L82 PathProgramCache]: Analyzing trace with hash -2060732981, now seen corresponding path program 1 times [2020-11-22 13:05:38,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:38,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39321032] [2020-11-22 13:05:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-22 13:05:38,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39321032] [2020-11-22 13:05:38,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49513] [2020-11-22 13:05:38,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1fd059c-aa18-4dec-b179-e5051fb5a487/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:05:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:38,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-22 13:05:38,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:05:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-22 13:05:38,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:05:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-22 13:05:38,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 13:05:38,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2020-11-22 13:05:38,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958321318] [2020-11-22 13:05:38,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:38,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:38,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:38,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:05:38,610 INFO L87 Difference]: Start difference. First operand 713 states and 952 transitions. Second operand 3 states. [2020-11-22 13:05:39,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:39,006 INFO L93 Difference]: Finished difference Result 1922 states and 2565 transitions. [2020-11-22 13:05:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:39,007 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 103 [2020-11-22 13:05:39,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:39,014 INFO L225 Difference]: With dead ends: 1922 [2020-11-22 13:05:39,014 INFO L226 Difference]: Without dead ends: 1139 [2020-11-22 13:05:39,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 203 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:05:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-22 13:05:39,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1068. [2020-11-22 13:05:39,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-11-22 13:05:39,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1357 transitions. [2020-11-22 13:05:39,056 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1357 transitions. Word has length 103 [2020-11-22 13:05:39,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:39,056 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1357 transitions. [2020-11-22 13:05:39,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:39,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1357 transitions. [2020-11-22 13:05:39,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-11-22 13:05:39,059 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:39,060 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:39,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-22 13:05:39,288 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:39,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:39,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1527561765, now seen corresponding path program 1 times [2020-11-22 13:05:39,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:39,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438783265] [2020-11-22 13:05:39,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-22 13:05:39,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438783265] [2020-11-22 13:05:39,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:39,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:05:39,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420299161] [2020-11-22 13:05:39,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:05:39,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:39,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:05:39,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:39,420 INFO L87 Difference]: Start difference. First operand 1068 states and 1357 transitions. Second operand 4 states. [2020-11-22 13:05:39,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:39,954 INFO L93 Difference]: Finished difference Result 2490 states and 3198 transitions. [2020-11-22 13:05:39,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:05:39,954 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2020-11-22 13:05:39,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:39,962 INFO L225 Difference]: With dead ends: 2490 [2020-11-22 13:05:39,962 INFO L226 Difference]: Without dead ends: 1423 [2020-11-22 13:05:39,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:39,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2020-11-22 13:05:39,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1139. [2020-11-22 13:05:39,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-22 13:05:39,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1445 transitions. [2020-11-22 13:05:39,997 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1445 transitions. Word has length 120 [2020-11-22 13:05:39,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:39,998 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1445 transitions. [2020-11-22 13:05:39,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:05:39,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1445 transitions. [2020-11-22 13:05:40,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-11-22 13:05:40,004 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:40,004 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:40,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 13:05:40,004 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:40,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:40,005 INFO L82 PathProgramCache]: Analyzing trace with hash 489839672, now seen corresponding path program 1 times [2020-11-22 13:05:40,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:40,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707777564] [2020-11-22 13:05:40,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-11-22 13:05:40,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707777564] [2020-11-22 13:05:40,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:40,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:05:40,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065134031] [2020-11-22 13:05:40,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:05:40,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:40,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:05:40,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:40,154 INFO L87 Difference]: Start difference. First operand 1139 states and 1445 transitions. Second operand 4 states. [2020-11-22 13:05:40,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:40,636 INFO L93 Difference]: Finished difference Result 2277 states and 2889 transitions. [2020-11-22 13:05:40,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:05:40,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-11-22 13:05:40,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:40,642 INFO L225 Difference]: With dead ends: 2277 [2020-11-22 13:05:40,643 INFO L226 Difference]: Without dead ends: 1139 [2020-11-22 13:05:40,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:40,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-22 13:05:40,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2020-11-22 13:05:40,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-22 13:05:40,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1422 transitions. [2020-11-22 13:05:40,674 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1422 transitions. Word has length 134 [2020-11-22 13:05:40,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:40,675 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1422 transitions. [2020-11-22 13:05:40,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:05:40,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1422 transitions. [2020-11-22 13:05:40,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-11-22 13:05:40,679 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:40,679 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:40,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-22 13:05:40,681 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:40,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:40,682 INFO L82 PathProgramCache]: Analyzing trace with hash -836348496, now seen corresponding path program 1 times [2020-11-22 13:05:40,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:40,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601580798] [2020-11-22 13:05:40,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-22 13:05:40,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601580798] [2020-11-22 13:05:40,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:40,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:05:40,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969436410] [2020-11-22 13:05:40,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:05:40,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:40,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:05:40,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:40,855 INFO L87 Difference]: Start difference. First operand 1139 states and 1422 transitions. Second operand 4 states. [2020-11-22 13:05:41,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:41,371 INFO L93 Difference]: Finished difference Result 2490 states and 3098 transitions. [2020-11-22 13:05:41,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:05:41,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-11-22 13:05:41,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:41,378 INFO L225 Difference]: With dead ends: 2490 [2020-11-22 13:05:41,379 INFO L226 Difference]: Without dead ends: 1352 [2020-11-22 13:05:41,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-11-22 13:05:41,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1068. [2020-11-22 13:05:41,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-11-22 13:05:41,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1276 transitions. [2020-11-22 13:05:41,418 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1276 transitions. Word has length 151 [2020-11-22 13:05:41,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:41,418 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1276 transitions. [2020-11-22 13:05:41,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:05:41,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1276 transitions. [2020-11-22 13:05:41,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-11-22 13:05:41,422 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:41,423 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:41,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-22 13:05:41,425 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:41,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:41,426 INFO L82 PathProgramCache]: Analyzing trace with hash 159363178, now seen corresponding path program 1 times [2020-11-22 13:05:41,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:41,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323952991] [2020-11-22 13:05:41,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-11-22 13:05:41,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323952991] [2020-11-22 13:05:41,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:41,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:05:41,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603082853] [2020-11-22 13:05:41,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:41,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:41,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:41,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:41,574 INFO L87 Difference]: Start difference. First operand 1068 states and 1276 transitions. Second operand 3 states. [2020-11-22 13:05:41,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:41,937 INFO L93 Difference]: Finished difference Result 2277 states and 2704 transitions. [2020-11-22 13:05:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:41,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2020-11-22 13:05:41,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:41,944 INFO L225 Difference]: With dead ends: 2277 [2020-11-22 13:05:41,944 INFO L226 Difference]: Without dead ends: 1210 [2020-11-22 13:05:41,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-11-22 13:05:41,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1139. [2020-11-22 13:05:41,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-22 13:05:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1328 transitions. [2020-11-22 13:05:41,979 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1328 transitions. Word has length 194 [2020-11-22 13:05:41,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:41,980 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1328 transitions. [2020-11-22 13:05:41,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:41,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1328 transitions. [2020-11-22 13:05:41,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-11-22 13:05:41,984 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:41,984 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:41,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-22 13:05:41,985 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:41,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:41,985 INFO L82 PathProgramCache]: Analyzing trace with hash 594684591, now seen corresponding path program 1 times [2020-11-22 13:05:41,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:41,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84094485] [2020-11-22 13:05:41,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 194 proven. 38 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-11-22 13:05:42,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84094485] [2020-11-22 13:05:42,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053778230] [2020-11-22 13:05:42,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1fd059c-aa18-4dec-b179-e5051fb5a487/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:05:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:42,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-22 13:05:42,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:05:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-11-22 13:05:42,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:05:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-11-22 13:05:42,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 13:05:42,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-11-22 13:05:42,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259153907] [2020-11-22 13:05:42,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:42,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:42,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:42,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:05:42,572 INFO L87 Difference]: Start difference. First operand 1139 states and 1328 transitions. Second operand 3 states. [2020-11-22 13:05:42,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:42,904 INFO L93 Difference]: Finished difference Result 2277 states and 2655 transitions. [2020-11-22 13:05:42,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:42,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2020-11-22 13:05:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:42,911 INFO L225 Difference]: With dead ends: 2277 [2020-11-22 13:05:42,911 INFO L226 Difference]: Without dead ends: 1139 [2020-11-22 13:05:42,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 411 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:05:42,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-22 13:05:42,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1068. [2020-11-22 13:05:42,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-11-22 13:05:42,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1238 transitions. [2020-11-22 13:05:42,943 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1238 transitions. Word has length 207 [2020-11-22 13:05:42,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:42,944 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1238 transitions. [2020-11-22 13:05:42,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:42,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1238 transitions. [2020-11-22 13:05:42,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-11-22 13:05:42,948 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:42,949 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:43,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:05:43,176 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:43,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:43,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1705216461, now seen corresponding path program 1 times [2020-11-22 13:05:43,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:43,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805519239] [2020-11-22 13:05:43,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 86 proven. 141 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-11-22 13:05:43,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805519239] [2020-11-22 13:05:43,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208501899] [2020-11-22 13:05:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1fd059c-aa18-4dec-b179-e5051fb5a487/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:05:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:43,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-22 13:05:43,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:05:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-11-22 13:05:43,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:05:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-11-22 13:05:43,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 13:05:43,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-11-22 13:05:43,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750048511] [2020-11-22 13:05:43,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:43,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:43,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:43,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:05:43,845 INFO L87 Difference]: Start difference. First operand 1068 states and 1238 transitions. Second operand 3 states. [2020-11-22 13:05:44,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:44,171 INFO L93 Difference]: Finished difference Result 2348 states and 2730 transitions. [2020-11-22 13:05:44,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:44,171 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2020-11-22 13:05:44,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:44,177 INFO L225 Difference]: With dead ends: 2348 [2020-11-22 13:05:44,177 INFO L226 Difference]: Without dead ends: 997 [2020-11-22 13:05:44,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:05:44,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-11-22 13:05:44,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 855. [2020-11-22 13:05:44,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 855 states. [2020-11-22 13:05:44,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 958 transitions. [2020-11-22 13:05:44,202 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 958 transitions. Word has length 216 [2020-11-22 13:05:44,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:44,203 INFO L481 AbstractCegarLoop]: Abstraction has 855 states and 958 transitions. [2020-11-22 13:05:44,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:44,203 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 958 transitions. [2020-11-22 13:05:44,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-11-22 13:05:44,208 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:44,208 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:44,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-22 13:05:44,436 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:44,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:44,436 INFO L82 PathProgramCache]: Analyzing trace with hash 590824356, now seen corresponding path program 1 times [2020-11-22 13:05:44,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:44,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541313395] [2020-11-22 13:05:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 200 proven. 180 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-11-22 13:05:44,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541313395] [2020-11-22 13:05:44,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569104217] [2020-11-22 13:05:44,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1fd059c-aa18-4dec-b179-e5051fb5a487/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:05:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:44,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-22 13:05:44,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:05:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-11-22 13:05:45,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:05:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-11-22 13:05:45,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 13:05:45,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-11-22 13:05:45,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834130768] [2020-11-22 13:05:45,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:45,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:45,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:45,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:05:45,155 INFO L87 Difference]: Start difference. First operand 855 states and 958 transitions. Second operand 3 states. [2020-11-22 13:05:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:45,447 INFO L93 Difference]: Finished difference Result 1778 states and 1997 transitions. [2020-11-22 13:05:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:45,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 263 [2020-11-22 13:05:45,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:45,449 INFO L225 Difference]: With dead ends: 1778 [2020-11-22 13:05:45,449 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:05:45,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 523 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:05:45,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:05:45,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:05:45,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:05:45,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:05:45,451 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 263 [2020-11-22 13:05:45,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:45,452 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:05:45,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:45,452 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:05:45,452 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:05:45,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:05:45,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 13:05:46,046 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-11-22 13:05:46,329 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-11-22 13:05:46,331 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-22 13:05:46,331 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-22 13:05:46,331 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-22 13:05:46,331 INFO L274 CegarLoopResult]: For program point L500-1(lines 40 585) no Hoare annotation was computed. [2020-11-22 13:05:46,331 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-22 13:05:46,331 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-22 13:05:46,331 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-22 13:05:46,331 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-22 13:05:46,331 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-22 13:05:46,331 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-22 13:05:46,331 INFO L274 CegarLoopResult]: For program point L503-1(lines 40 585) no Hoare annotation was computed. [2020-11-22 13:05:46,331 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-22 13:05:46,331 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-22 13:05:46,332 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-22 13:05:46,332 INFO L274 CegarLoopResult]: For program point L504(line 504) no Hoare annotation was computed. [2020-11-22 13:05:46,332 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-22 13:05:46,332 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-22 13:05:46,332 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-22 13:05:46,332 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-22 13:05:46,332 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-22 13:05:46,332 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-22 13:05:46,332 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-22 13:05:46,332 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-22 13:05:46,332 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-22 13:05:46,332 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-22 13:05:46,332 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-22 13:05:46,332 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-22 13:05:46,332 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-22 13:05:46,332 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-22 13:05:46,332 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-22 13:05:46,332 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-22 13:05:46,332 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-22 13:05:46,333 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-22 13:05:46,333 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-22 13:05:46,333 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-22 13:05:46,333 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-22 13:05:46,333 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-22 13:05:46,333 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-22 13:05:46,333 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-22 13:05:46,333 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 13:05:46,333 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-22 13:05:46,333 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-22 13:05:46,333 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-22 13:05:46,333 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse0 (= ~a7~0 1))) (let ((.cse6 (<= ~a16~0 4)) (.cse2 (= ~a20~0 1)) (.cse7 (= ~a17~0 1)) (.cse1 (= ~a16~0 6)) (.cse4 (not .cse0)) (.cse5 (<= 15 ~a8~0)) (.cse9 (<= ~a20~0 0)) (.cse3 (= ~a21~0 1)) (.cse8 (<= ~a16~0 5))) (or (and .cse0 .cse1 .cse2) (and .cse3 .cse2 .cse4 .cse5) (and .cse3 .cse6 .cse2) (and .cse0 .cse6 .cse7) (and .cse0 .cse6 .cse2) (and .cse3 (= ~a12~0 8) .cse2 .cse4 .cse7) (and .cse3 .cse8 .cse9) (and .cse0 .cse8 .cse2 .cse7) (and .cse3 .cse1 .cse4 .cse5 .cse9) (and .cse0 .cse3 .cse8)))) [2020-11-22 13:05:46,333 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-22 13:05:46,334 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-22 13:05:46,334 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-22 13:05:46,334 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-22 13:05:46,334 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-22 13:05:46,334 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-22 13:05:46,334 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-22 13:05:46,334 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 13:05:46,334 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-22 13:05:46,334 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-22 13:05:46,334 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-22 13:05:46,334 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-22 13:05:46,334 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-22 13:05:46,334 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-22 13:05:46,334 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-22 13:05:46,334 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-22 13:05:46,334 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-22 13:05:46,334 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-22 13:05:46,334 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-22 13:05:46,334 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-22 13:05:46,335 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-22 13:05:46,335 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-22 13:05:46,335 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-22 13:05:46,335 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse0 (= ~a7~0 1))) (let ((.cse6 (<= ~a16~0 4)) (.cse2 (= ~a20~0 1)) (.cse7 (= ~a17~0 1)) (.cse1 (= ~a16~0 6)) (.cse4 (not .cse0)) (.cse5 (<= 15 ~a8~0)) (.cse9 (<= ~a20~0 0)) (.cse3 (= ~a21~0 1)) (.cse8 (<= ~a16~0 5))) (or (and .cse0 .cse1 .cse2) (and .cse3 .cse2 .cse4 .cse5) (and .cse3 .cse6 .cse2) (and .cse0 .cse6 .cse7) (and .cse0 .cse6 .cse2) (and .cse3 (= ~a12~0 8) .cse2 .cse4 .cse7) (and .cse3 .cse8 .cse9) (and .cse0 .cse8 .cse2 .cse7) (and .cse3 .cse1 .cse4 .cse5 .cse9) (and .cse0 .cse3 .cse8)))) [2020-11-22 13:05:46,335 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-22 13:05:46,335 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-22 13:05:46,335 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-22 13:05:46,335 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-22 13:05:46,335 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-22 13:05:46,335 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-22 13:05:46,335 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-22 13:05:46,335 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-22 13:05:46,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:05:46 BoogieIcfgContainer [2020-11-22 13:05:46,367 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:05:46,368 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:05:46,368 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:05:46,370 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:05:46,370 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:34" (3/4) ... [2020-11-22 13:05:46,373 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:05:46,403 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 102 nodes and edges [2020-11-22 13:05:46,405 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-11-22 13:05:46,406 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-22 13:05:46,408 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-22 13:05:46,574 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d1fd059c-aa18-4dec-b179-e5051fb5a487/bin/utaipan/witness.graphml [2020-11-22 13:05:46,574 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:05:46,575 INFO L168 Benchmark]: Toolchain (without parser) took 15847.73 ms. Allocated memory was 102.8 MB in the beginning and 375.4 MB in the end (delta: 272.6 MB). Free memory was 66.3 MB in the beginning and 233.5 MB in the end (delta: -167.2 MB). Peak memory consumption was 106.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:46,576 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 102.8 MB. Free memory was 76.2 MB in the beginning and 84.8 MB in the end (delta: -8.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:46,576 INFO L168 Benchmark]: CACSL2BoogieTranslator took 660.79 ms. Allocated memory is still 102.8 MB. Free memory was 66.1 MB in the beginning and 63.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:46,576 INFO L168 Benchmark]: Boogie Procedure Inliner took 92.72 ms. Allocated memory is still 102.8 MB. Free memory was 63.2 MB in the beginning and 57.6 MB in the end (delta: 5.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:46,577 INFO L168 Benchmark]: Boogie Preprocessor took 79.00 ms. Allocated memory is still 102.8 MB. Free memory was 57.6 MB in the beginning and 53.1 MB in the end (delta: 4.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:46,577 INFO L168 Benchmark]: RCFGBuilder took 2595.39 ms. Allocated memory was 102.8 MB in the beginning and 142.6 MB in the end (delta: 39.8 MB). Free memory was 53.1 MB in the beginning and 79.3 MB in the end (delta: -26.2 MB). Peak memory consumption was 49.7 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:46,578 INFO L168 Benchmark]: TraceAbstraction took 12205.90 ms. Allocated memory was 142.6 MB in the beginning and 375.4 MB in the end (delta: 232.8 MB). Free memory was 78.2 MB in the beginning and 249.2 MB in the end (delta: -171.0 MB). Peak memory consumption was 191.8 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:46,578 INFO L168 Benchmark]: Witness Printer took 206.33 ms. Allocated memory is still 375.4 MB. Free memory was 249.2 MB in the beginning and 233.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:46,580 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 102.8 MB. Free memory was 76.2 MB in the beginning and 84.8 MB in the end (delta: -8.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 660.79 ms. Allocated memory is still 102.8 MB. Free memory was 66.1 MB in the beginning and 63.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 92.72 ms. Allocated memory is still 102.8 MB. Free memory was 63.2 MB in the beginning and 57.6 MB in the end (delta: 5.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 79.00 ms. Allocated memory is still 102.8 MB. Free memory was 57.6 MB in the beginning and 53.1 MB in the end (delta: 4.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2595.39 ms. Allocated memory was 102.8 MB in the beginning and 142.6 MB in the end (delta: 39.8 MB). Free memory was 53.1 MB in the beginning and 79.3 MB in the end (delta: -26.2 MB). Peak memory consumption was 49.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12205.90 ms. Allocated memory was 142.6 MB in the beginning and 375.4 MB in the end (delta: 232.8 MB). Free memory was 78.2 MB in the beginning and 249.2 MB in the end (delta: -171.0 MB). Peak memory consumption was 191.8 MB. Max. memory is 16.1 GB. * Witness Printer took 206.33 ms. Allocated memory is still 375.4 MB. Free memory was 249.2 MB in the beginning and 233.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((a7 == 1 && a16 == 6) && a20 == 1) || (((a21 == 1 && a20 == 1) && !(a7 == 1)) && 15 <= a8)) || ((a21 == 1 && a16 <= 4) && a20 == 1)) || ((a7 == 1 && a16 <= 4) && a17 == 1)) || ((a7 == 1 && a16 <= 4) && a20 == 1)) || ((((a21 == 1 && a12 == 8) && a20 == 1) && !(a7 == 1)) && a17 == 1)) || ((a21 == 1 && a16 <= 5) && a20 <= 0)) || (((a7 == 1 && a16 <= 5) && a20 == 1) && a17 == 1)) || ((((a21 == 1 && a16 == 6) && !(a7 == 1)) && 15 <= a8) && a20 <= 0)) || ((a7 == 1 && a21 == 1) && a16 <= 5) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((((a7 == 1 && a16 == 6) && a20 == 1) || (((a21 == 1 && a20 == 1) && !(a7 == 1)) && 15 <= a8)) || ((a21 == 1 && a16 <= 4) && a20 == 1)) || ((a7 == 1 && a16 <= 4) && a17 == 1)) || ((a7 == 1 && a16 <= 4) && a20 == 1)) || ((((a21 == 1 && a12 == 8) && a20 == 1) && !(a7 == 1)) && a17 == 1)) || ((a21 == 1 && a16 <= 5) && a20 <= 0)) || (((a7 == 1 && a16 <= 5) && a20 == 1) && a17 == 1)) || ((((a21 == 1 && a16 == 6) && !(a7 == 1)) && 15 <= a8) && a20 <= 0)) || ((a7 == 1 && a21 == 1) && a16 <= 5) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.4s, OverallIterations: 13, TraceHistogramMax: 6, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 684 SDtfs, 1141 SDslu, 63 SDs, 0 SdLazy, 3018 SolverSat, 730 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1613 GetRequests, 1579 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1139occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 13 MinimizatonAttempts, 1207 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 43 NumberOfFragments, 245 HoareAnnotationTreeSize, 3 FomulaSimplifications, 1988 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 190 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 2586 NumberOfCodeBlocks, 2586 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 3354 ConstructedInterpolants, 0 QuantifiedInterpolants, 2428780 SizeOfPredicates, 2 NumberOfNonLiveVariables, 1769 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 21 InterpolantComputations, 17 PerfectInterpolantSequences, 3312/3674 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...