./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_c6b50371-2827-4da0-85b3-2d7d3e2dd630/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c6b50371-2827-4da0-85b3-2d7d3e2dd630/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c6b50371-2827-4da0-85b3-2d7d3e2dd630/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c6b50371-2827-4da0-85b3-2d7d3e2dd630/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label51.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c6b50371-2827-4da0-85b3-2d7d3e2dd630/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c6b50371-2827-4da0-85b3-2d7d3e2dd630/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 [2020-11-28 07:41:07,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:41:07,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:41:07,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:41:07,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:41:07,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:41:07,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:41:07,293 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:41:07,295 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:41:07,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:41:07,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:41:07,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:41:07,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:41:07,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:41:07,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:41:07,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:41:07,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:41:07,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:41:07,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:41:07,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:41:07,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:41:07,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:41:07,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:41:07,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:41:07,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:41:07,346 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:41:07,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:41:07,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:41:07,349 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:41:07,351 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:41:07,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:41:07,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:41:07,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:41:07,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:41:07,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:41:07,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:41:07,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:41:07,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:41:07,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:41:07,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:41:07,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:41:07,362 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c6b50371-2827-4da0-85b3-2d7d3e2dd630/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:41:07,386 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:41:07,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:41:07,392 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:41:07,392 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:41:07,392 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:41:07,393 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:41:07,393 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:41:07,394 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:41:07,394 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:41:07,394 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:41:07,395 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:41:07,395 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:41:07,396 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:41:07,396 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:41:07,396 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:41:07,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:41:07,397 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:41:07,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:41:07,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:41:07,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:41:07,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:41:07,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:41:07,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:41:07,399 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:41:07,399 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:41:07,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:41:07,400 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:41:07,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:41:07,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:41:07,402 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:41:07,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:41:07,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:41:07,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:41:07,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:41:07,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:41:07,403 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:41:07,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:41:07,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:41:07,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:41:07,404 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:41:07,405 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_c6b50371-2827-4da0-85b3-2d7d3e2dd630/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c6b50371-2827-4da0-85b3-2d7d3e2dd630/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b662101800a9cac954243c459de117719237e24 [2020-11-28 07:41:07,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:41:07,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:41:07,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:41:07,724 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:41:07,724 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:41:07,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c6b50371-2827-4da0-85b3-2d7d3e2dd630/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label51.c [2020-11-28 07:41:07,811 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c6b50371-2827-4da0-85b3-2d7d3e2dd630/bin/utaipan/data/2cb50a016/4474b99f28654930933415d45647ef36/FLAG0653f52b0 [2020-11-28 07:41:08,397 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:41:08,397 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c6b50371-2827-4da0-85b3-2d7d3e2dd630/sv-benchmarks/c/eca-rers2012/Problem01_label51.c [2020-11-28 07:41:08,407 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c6b50371-2827-4da0-85b3-2d7d3e2dd630/bin/utaipan/data/2cb50a016/4474b99f28654930933415d45647ef36/FLAG0653f52b0 [2020-11-28 07:41:08,634 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c6b50371-2827-4da0-85b3-2d7d3e2dd630/bin/utaipan/data/2cb50a016/4474b99f28654930933415d45647ef36 [2020-11-28 07:41:08,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:41:08,638 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:41:08,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:08,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:41:08,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:41:08,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:08" (1/1) ... [2020-11-28 07:41:08,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72c2f573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:08, skipping insertion in model container [2020-11-28 07:41:08,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:08" (1/1) ... [2020-11-28 07:41:08,654 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:41:08,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:41:09,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:09,156 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:41:09,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:09,356 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:41:09,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:09 WrapperNode [2020-11-28 07:41:09,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:09,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:09,359 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:41:09,359 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:41:09,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:09" (1/1) ... [2020-11-28 07:41:09,385 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:09" (1/1) ... [2020-11-28 07:41:09,447 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:09,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:41:09,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:41:09,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:41:09,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:09" (1/1) ... [2020-11-28 07:41:09,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:09" (1/1) ... [2020-11-28 07:41:09,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:09" (1/1) ... [2020-11-28 07:41:09,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:09" (1/1) ... [2020-11-28 07:41:09,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:09" (1/1) ... [2020-11-28 07:41:09,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:09" (1/1) ... [2020-11-28 07:41:09,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:09" (1/1) ... [2020-11-28 07:41:09,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:41:09,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:41:09,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:41:09,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:41:09,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b50371-2827-4da0-85b3-2d7d3e2dd630/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 [2020-11-28 07:41:09,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:41:09,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:41:09,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:41:09,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:41:11,952 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:41:11,952 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:41:11,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:11 BoogieIcfgContainer [2020-11-28 07:41:11,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:41:11,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:41:11,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:41:11,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:41:11,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:41:08" (1/3) ... [2020-11-28 07:41:11,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4455d748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:11, skipping insertion in model container [2020-11-28 07:41:11,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:09" (2/3) ... [2020-11-28 07:41:11,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4455d748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:11, skipping insertion in model container [2020-11-28 07:41:11,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:11" (3/3) ... [2020-11-28 07:41:11,964 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label51.c [2020-11-28 07:41:11,977 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:41:11,982 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:41:11,993 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:41:12,017 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:41:12,018 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:41:12,018 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:41:12,018 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:41:12,018 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:41:12,019 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:41:12,019 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:41:12,019 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:41:12,037 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-28 07:41:12,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-28 07:41:12,045 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:12,046 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] [2020-11-28 07:41:12,046 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:12,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:12,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2004384300, now seen corresponding path program 1 times [2020-11-28 07:41:12,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:12,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482031611] [2020-11-28 07:41:12,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:12,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482031611] [2020-11-28 07:41:12,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:12,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:41:12,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494496854] [2020-11-28 07:41:12,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:12,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:12,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:12,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:12,561 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-28 07:41:13,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:13,180 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-28 07:41:13,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:13,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-28 07:41:13,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:13,194 INFO L225 Difference]: With dead ends: 224 [2020-11-28 07:41:13,194 INFO L226 Difference]: Without dead ends: 145 [2020-11-28 07:41:13,197 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 [2020-11-28 07:41:13,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-28 07:41:13,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-28 07:41:13,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-28 07:41:13,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2020-11-28 07:41:13,273 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2020-11-28 07:41:13,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:13,274 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2020-11-28 07:41:13,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:13,274 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2020-11-28 07:41:13,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-28 07:41:13,280 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:13,280 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] [2020-11-28 07:41:13,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:41:13,281 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:13,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:13,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1988670015, now seen corresponding path program 1 times [2020-11-28 07:41:13,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:13,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578068412] [2020-11-28 07:41:13,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:13,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578068412] [2020-11-28 07:41:13,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:13,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:41:13,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460909314] [2020-11-28 07:41:13,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:13,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:13,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:13,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:13,365 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2020-11-28 07:41:13,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:13,900 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2020-11-28 07:41:13,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:13,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-11-28 07:41:13,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:13,904 INFO L225 Difference]: With dead ends: 431 [2020-11-28 07:41:13,904 INFO L226 Difference]: Without dead ends: 287 [2020-11-28 07:41:13,906 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 [2020-11-28 07:41:13,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-28 07:41:13,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-11-28 07:41:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-28 07:41:13,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 468 transitions. [2020-11-28 07:41:13,937 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 468 transitions. Word has length 77 [2020-11-28 07:41:13,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:13,937 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 468 transitions. [2020-11-28 07:41:13,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:13,937 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 468 transitions. [2020-11-28 07:41:13,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-28 07:41:13,940 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:13,941 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] [2020-11-28 07:41:13,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:41:13,941 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:13,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:13,942 INFO L82 PathProgramCache]: Analyzing trace with hash 2043360669, now seen corresponding path program 1 times [2020-11-28 07:41:13,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:13,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078562686] [2020-11-28 07:41:13,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:14,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078562686] [2020-11-28 07:41:14,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:14,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:14,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283392844] [2020-11-28 07:41:14,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:14,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:14,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:14,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:14,143 INFO L87 Difference]: Start difference. First operand 287 states and 468 transitions. Second operand 4 states. [2020-11-28 07:41:14,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:14,897 INFO L93 Difference]: Finished difference Result 784 states and 1255 transitions. [2020-11-28 07:41:14,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:14,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-11-28 07:41:14,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:14,901 INFO L225 Difference]: With dead ends: 784 [2020-11-28 07:41:14,901 INFO L226 Difference]: Without dead ends: 429 [2020-11-28 07:41:14,903 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 [2020-11-28 07:41:14,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-11-28 07:41:14,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 358. [2020-11-28 07:41:14,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-11-28 07:41:14,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 482 transitions. [2020-11-28 07:41:14,940 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 482 transitions. Word has length 78 [2020-11-28 07:41:14,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:14,941 INFO L481 AbstractCegarLoop]: Abstraction has 358 states and 482 transitions. [2020-11-28 07:41:14,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:14,941 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 482 transitions. [2020-11-28 07:41:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-28 07:41:14,944 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:14,944 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] [2020-11-28 07:41:14,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:41:14,944 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:14,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:14,945 INFO L82 PathProgramCache]: Analyzing trace with hash 2117707289, now seen corresponding path program 1 times [2020-11-28 07:41:14,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:14,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808190671] [2020-11-28 07:41:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:15,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808190671] [2020-11-28 07:41:15,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:15,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:15,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161508647] [2020-11-28 07:41:15,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:15,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:15,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:15,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:15,116 INFO L87 Difference]: Start difference. First operand 358 states and 482 transitions. Second operand 4 states. [2020-11-28 07:41:15,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:15,702 INFO L93 Difference]: Finished difference Result 928 states and 1284 transitions. [2020-11-28 07:41:15,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:15,703 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2020-11-28 07:41:15,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:15,706 INFO L225 Difference]: With dead ends: 928 [2020-11-28 07:41:15,707 INFO L226 Difference]: Without dead ends: 571 [2020-11-28 07:41:15,708 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 [2020-11-28 07:41:15,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-11-28 07:41:15,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2020-11-28 07:41:15,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-28 07:41:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 774 transitions. [2020-11-28 07:41:15,730 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 774 transitions. Word has length 86 [2020-11-28 07:41:15,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:15,730 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 774 transitions. [2020-11-28 07:41:15,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:15,731 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 774 transitions. [2020-11-28 07:41:15,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-28 07:41:15,734 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:15,734 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] [2020-11-28 07:41:15,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:41:15,735 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:15,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:15,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1196143196, now seen corresponding path program 1 times [2020-11-28 07:41:15,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:15,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416669502] [2020-11-28 07:41:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-28 07:41:15,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416669502] [2020-11-28 07:41:15,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:15,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:15,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762009352] [2020-11-28 07:41:15,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:15,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:15,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:15,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:15,810 INFO L87 Difference]: Start difference. First operand 571 states and 774 transitions. Second operand 3 states. [2020-11-28 07:41:16,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:16,245 INFO L93 Difference]: Finished difference Result 1496 states and 1992 transitions. [2020-11-28 07:41:16,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:16,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-11-28 07:41:16,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:16,251 INFO L225 Difference]: With dead ends: 1496 [2020-11-28 07:41:16,252 INFO L226 Difference]: Without dead ends: 926 [2020-11-28 07:41:16,253 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 [2020-11-28 07:41:16,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-11-28 07:41:16,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 713. [2020-11-28 07:41:16,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-11-28 07:41:16,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 952 transitions. [2020-11-28 07:41:16,278 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 952 transitions. Word has length 97 [2020-11-28 07:41:16,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:16,278 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 952 transitions. [2020-11-28 07:41:16,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:16,278 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 952 transitions. [2020-11-28 07:41:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-11-28 07:41:16,280 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:16,281 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] [2020-11-28 07:41:16,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:41:16,281 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:16,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:16,282 INFO L82 PathProgramCache]: Analyzing trace with hash -2060732981, now seen corresponding path program 1 times [2020-11-28 07:41:16,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:16,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870393526] [2020-11-28 07:41:16,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-28 07:41:16,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870393526] [2020-11-28 07:41:16,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746252682] [2020-11-28 07:41:16,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b50371-2827-4da0-85b3-2d7d3e2dd630/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 [2020-11-28 07:41:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:16,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:41:16,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-28 07:41:16,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:16,714 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-28 07:41:16,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:41:16,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2020-11-28 07:41:16,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331810454] [2020-11-28 07:41:16,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:16,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:16,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:16,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:41:16,716 INFO L87 Difference]: Start difference. First operand 713 states and 952 transitions. Second operand 3 states. [2020-11-28 07:41:17,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:17,198 INFO L93 Difference]: Finished difference Result 1922 states and 2565 transitions. [2020-11-28 07:41:17,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:17,199 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 103 [2020-11-28 07:41:17,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:17,211 INFO L225 Difference]: With dead ends: 1922 [2020-11-28 07:41:17,211 INFO L226 Difference]: Without dead ends: 1139 [2020-11-28 07:41:17,220 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 [2020-11-28 07:41:17,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-28 07:41:17,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1068. [2020-11-28 07:41:17,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-11-28 07:41:17,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1357 transitions. [2020-11-28 07:41:17,292 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1357 transitions. Word has length 103 [2020-11-28 07:41:17,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:17,293 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1357 transitions. [2020-11-28 07:41:17,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:17,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1357 transitions. [2020-11-28 07:41:17,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-11-28 07:41:17,296 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:17,297 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] [2020-11-28 07:41:17,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-28 07:41:17,504 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:17,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:17,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1527561765, now seen corresponding path program 1 times [2020-11-28 07:41:17,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:17,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733100518] [2020-11-28 07:41:17,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-28 07:41:17,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733100518] [2020-11-28 07:41:17,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:17,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:41:17,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524044206] [2020-11-28 07:41:17,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:17,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:17,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:17,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:17,627 INFO L87 Difference]: Start difference. First operand 1068 states and 1357 transitions. Second operand 4 states. [2020-11-28 07:41:18,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:18,372 INFO L93 Difference]: Finished difference Result 2490 states and 3198 transitions. [2020-11-28 07:41:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:18,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2020-11-28 07:41:18,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:18,383 INFO L225 Difference]: With dead ends: 2490 [2020-11-28 07:41:18,384 INFO L226 Difference]: Without dead ends: 1423 [2020-11-28 07:41:18,386 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 [2020-11-28 07:41:18,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2020-11-28 07:41:18,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1139. [2020-11-28 07:41:18,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:41:18,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1445 transitions. [2020-11-28 07:41:18,429 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1445 transitions. Word has length 120 [2020-11-28 07:41:18,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:18,430 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1445 transitions. [2020-11-28 07:41:18,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:18,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1445 transitions. [2020-11-28 07:41:18,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-11-28 07:41:18,438 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:18,439 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] [2020-11-28 07:41:18,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:41:18,439 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:18,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:18,440 INFO L82 PathProgramCache]: Analyzing trace with hash 489839672, now seen corresponding path program 1 times [2020-11-28 07:41:18,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:18,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134429348] [2020-11-28 07:41:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-11-28 07:41:18,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134429348] [2020-11-28 07:41:18,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:18,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:18,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735562081] [2020-11-28 07:41:18,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:18,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:18,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:18,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:18,592 INFO L87 Difference]: Start difference. First operand 1139 states and 1445 transitions. Second operand 4 states. [2020-11-28 07:41:19,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:19,225 INFO L93 Difference]: Finished difference Result 2277 states and 2889 transitions. [2020-11-28 07:41:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:19,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-11-28 07:41:19,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:19,234 INFO L225 Difference]: With dead ends: 2277 [2020-11-28 07:41:19,234 INFO L226 Difference]: Without dead ends: 1139 [2020-11-28 07:41:19,236 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 [2020-11-28 07:41:19,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-28 07:41:19,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2020-11-28 07:41:19,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:41:19,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1422 transitions. [2020-11-28 07:41:19,273 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1422 transitions. Word has length 134 [2020-11-28 07:41:19,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:19,274 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1422 transitions. [2020-11-28 07:41:19,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:19,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1422 transitions. [2020-11-28 07:41:19,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-11-28 07:41:19,296 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:19,296 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] [2020-11-28 07:41:19,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:41:19,299 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:19,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:19,300 INFO L82 PathProgramCache]: Analyzing trace with hash -836348496, now seen corresponding path program 1 times [2020-11-28 07:41:19,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:19,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930687618] [2020-11-28 07:41:19,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-28 07:41:19,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930687618] [2020-11-28 07:41:19,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:19,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:19,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887451817] [2020-11-28 07:41:19,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:19,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:19,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:19,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:19,495 INFO L87 Difference]: Start difference. First operand 1139 states and 1422 transitions. Second operand 4 states. [2020-11-28 07:41:20,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:20,153 INFO L93 Difference]: Finished difference Result 2490 states and 3098 transitions. [2020-11-28 07:41:20,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:20,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-11-28 07:41:20,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:20,163 INFO L225 Difference]: With dead ends: 2490 [2020-11-28 07:41:20,165 INFO L226 Difference]: Without dead ends: 1352 [2020-11-28 07:41:20,167 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 [2020-11-28 07:41:20,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-11-28 07:41:20,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1068. [2020-11-28 07:41:20,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-11-28 07:41:20,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1276 transitions. [2020-11-28 07:41:20,229 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1276 transitions. Word has length 151 [2020-11-28 07:41:20,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:20,230 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1276 transitions. [2020-11-28 07:41:20,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:20,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1276 transitions. [2020-11-28 07:41:20,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-11-28 07:41:20,234 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:20,234 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] [2020-11-28 07:41:20,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 07:41:20,236 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:20,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:20,237 INFO L82 PathProgramCache]: Analyzing trace with hash 159363178, now seen corresponding path program 1 times [2020-11-28 07:41:20,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:20,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568081834] [2020-11-28 07:41:20,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-11-28 07:41:20,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568081834] [2020-11-28 07:41:20,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:20,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:20,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381165883] [2020-11-28 07:41:20,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:20,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:20,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:20,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:20,362 INFO L87 Difference]: Start difference. First operand 1068 states and 1276 transitions. Second operand 3 states. [2020-11-28 07:41:20,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:20,828 INFO L93 Difference]: Finished difference Result 2277 states and 2704 transitions. [2020-11-28 07:41:20,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:20,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2020-11-28 07:41:20,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:20,837 INFO L225 Difference]: With dead ends: 2277 [2020-11-28 07:41:20,837 INFO L226 Difference]: Without dead ends: 1210 [2020-11-28 07:41:20,839 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 [2020-11-28 07:41:20,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-11-28 07:41:20,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1139. [2020-11-28 07:41:20,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:41:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1328 transitions. [2020-11-28 07:41:20,877 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1328 transitions. Word has length 194 [2020-11-28 07:41:20,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:20,877 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1328 transitions. [2020-11-28 07:41:20,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:20,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1328 transitions. [2020-11-28 07:41:20,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-11-28 07:41:20,882 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:20,882 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] [2020-11-28 07:41:20,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 07:41:20,883 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:20,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:20,883 INFO L82 PathProgramCache]: Analyzing trace with hash 594684591, now seen corresponding path program 1 times [2020-11-28 07:41:20,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:20,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830463950] [2020-11-28 07:41:20,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 194 proven. 38 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-11-28 07:41:21,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830463950] [2020-11-28 07:41:21,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127870107] [2020-11-28 07:41:21,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b50371-2827-4da0-85b3-2d7d3e2dd630/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 [2020-11-28 07:41:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:21,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:41:21,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-11-28 07:41:21,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-11-28 07:41:21,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:41:21,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-11-28 07:41:21,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603913642] [2020-11-28 07:41:21,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:21,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:21,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:21,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:41:21,517 INFO L87 Difference]: Start difference. First operand 1139 states and 1328 transitions. Second operand 3 states. [2020-11-28 07:41:21,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:21,990 INFO L93 Difference]: Finished difference Result 2277 states and 2655 transitions. [2020-11-28 07:41:21,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:21,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2020-11-28 07:41:21,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:21,998 INFO L225 Difference]: With dead ends: 2277 [2020-11-28 07:41:21,998 INFO L226 Difference]: Without dead ends: 1139 [2020-11-28 07:41:22,001 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 [2020-11-28 07:41:22,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-28 07:41:22,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1068. [2020-11-28 07:41:22,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-11-28 07:41:22,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1238 transitions. [2020-11-28 07:41:22,038 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1238 transitions. Word has length 207 [2020-11-28 07:41:22,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:22,039 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1238 transitions. [2020-11-28 07:41:22,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:22,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1238 transitions. [2020-11-28 07:41:22,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-11-28 07:41:22,044 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:22,044 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] [2020-11-28 07:41:22,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:22,260 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:22,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:22,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1705216461, now seen corresponding path program 1 times [2020-11-28 07:41:22,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:22,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834270093] [2020-11-28 07:41:22,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 86 proven. 141 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-11-28 07:41:22,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834270093] [2020-11-28 07:41:22,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886193267] [2020-11-28 07:41:22,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b50371-2827-4da0-85b3-2d7d3e2dd630/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 [2020-11-28 07:41:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:22,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:41:22,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-11-28 07:41:22,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-11-28 07:41:22,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:41:22,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-11-28 07:41:22,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542172400] [2020-11-28 07:41:22,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:22,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:22,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:22,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:41:22,953 INFO L87 Difference]: Start difference. First operand 1068 states and 1238 transitions. Second operand 3 states. [2020-11-28 07:41:23,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:23,309 INFO L93 Difference]: Finished difference Result 2348 states and 2730 transitions. [2020-11-28 07:41:23,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:23,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2020-11-28 07:41:23,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:23,314 INFO L225 Difference]: With dead ends: 2348 [2020-11-28 07:41:23,314 INFO L226 Difference]: Without dead ends: 997 [2020-11-28 07:41:23,316 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 [2020-11-28 07:41:23,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-11-28 07:41:23,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 855. [2020-11-28 07:41:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 855 states. [2020-11-28 07:41:23,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 958 transitions. [2020-11-28 07:41:23,340 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 958 transitions. Word has length 216 [2020-11-28 07:41:23,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:23,340 INFO L481 AbstractCegarLoop]: Abstraction has 855 states and 958 transitions. [2020-11-28 07:41:23,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:23,341 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 958 transitions. [2020-11-28 07:41:23,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-11-28 07:41:23,346 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:23,346 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] [2020-11-28 07:41:23,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-28 07:41:23,571 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:23,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:23,572 INFO L82 PathProgramCache]: Analyzing trace with hash 590824356, now seen corresponding path program 1 times [2020-11-28 07:41:23,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:23,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768474252] [2020-11-28 07:41:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 200 proven. 180 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-11-28 07:41:24,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768474252] [2020-11-28 07:41:24,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520049992] [2020-11-28 07:41:24,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b50371-2827-4da0-85b3-2d7d3e2dd630/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 [2020-11-28 07:41:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:24,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:41:24,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-11-28 07:41:24,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-11-28 07:41:24,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:41:24,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-11-28 07:41:24,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272181178] [2020-11-28 07:41:24,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:24,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:24,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:24,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:41:24,427 INFO L87 Difference]: Start difference. First operand 855 states and 958 transitions. Second operand 3 states. [2020-11-28 07:41:24,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:24,780 INFO L93 Difference]: Finished difference Result 1778 states and 1997 transitions. [2020-11-28 07:41:24,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:24,781 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 263 [2020-11-28 07:41:24,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:24,781 INFO L225 Difference]: With dead ends: 1778 [2020-11-28 07:41:24,781 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:41:24,783 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 [2020-11-28 07:41:24,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:41:24,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:41:24,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:41:24,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:41:24,783 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 263 [2020-11-28 07:41:24,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:24,783 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:41:24,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:24,783 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:41:24,783 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:41:24,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:24,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:41:25,464 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-11-28 07:41:25,828 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-11-28 07:41:25,830 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-28 07:41:25,830 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-28 07:41:25,830 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-28 07:41:25,830 INFO L274 CegarLoopResult]: For program point L500-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:41:25,830 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-28 07:41:25,830 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-28 07:41:25,831 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-28 07:41:25,831 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-28 07:41:25,831 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-28 07:41:25,831 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-28 07:41:25,831 INFO L274 CegarLoopResult]: For program point L503-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:41:25,831 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-28 07:41:25,831 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-28 07:41:25,831 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-28 07:41:25,831 INFO L274 CegarLoopResult]: For program point L504(line 504) no Hoare annotation was computed. [2020-11-28 07:41:25,831 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-28 07:41:25,831 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-28 07:41:25,831 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-28 07:41:25,832 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-28 07:41:25,832 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-28 07:41:25,832 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-28 07:41:25,832 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-28 07:41:25,832 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-28 07:41:25,832 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-28 07:41:25,832 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-28 07:41:25,832 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-28 07:41:25,832 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-28 07:41:25,832 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-28 07:41:25,832 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-28 07:41:25,832 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-28 07:41:25,832 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-28 07:41:25,833 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-28 07:41:25,833 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-28 07:41:25,833 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-28 07:41:25,833 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-28 07:41:25,833 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-28 07:41:25,833 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-28 07:41:25,833 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-28 07:41:25,833 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-28 07:41:25,833 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:41:25,833 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-28 07:41:25,833 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-28 07:41:25,833 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-28 07:41:25,834 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)))) [2020-11-28 07:41:25,834 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-28 07:41:25,834 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-28 07:41:25,834 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-28 07:41:25,834 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-28 07:41:25,834 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-28 07:41:25,834 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-28 07:41:25,834 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-28 07:41:25,834 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:41:25,835 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-28 07:41:25,835 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-28 07:41:25,835 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-28 07:41:25,835 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-28 07:41:25,835 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-28 07:41:25,835 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-28 07:41:25,836 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-28 07:41:25,836 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-28 07:41:25,836 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-28 07:41:25,837 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-28 07:41:25,837 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-28 07:41:25,837 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-28 07:41:25,837 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-28 07:41:25,837 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-28 07:41:25,837 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-28 07:41:25,838 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)))) [2020-11-28 07:41:25,838 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-28 07:41:25,838 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:41:25,838 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-28 07:41:25,838 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-28 07:41:25,838 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-28 07:41:25,839 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-28 07:41:25,839 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-28 07:41:25,839 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-28 07:41:25,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:41:25 BoogieIcfgContainer [2020-11-28 07:41:25,860 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:41:25,861 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:41:25,861 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:41:25,861 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:41:25,862 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:11" (3/4) ... [2020-11-28 07:41:25,865 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:41:25,897 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 102 nodes and edges [2020-11-28 07:41:25,898 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-11-28 07:41:25,900 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-28 07:41:25,902 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-28 07:41:26,070 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c6b50371-2827-4da0-85b3-2d7d3e2dd630/bin/utaipan/witness.graphml [2020-11-28 07:41:26,070 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:41:26,071 INFO L168 Benchmark]: Toolchain (without parser) took 17432.91 ms. Allocated memory was 98.6 MB in the beginning and 377.5 MB in the end (delta: 278.9 MB). Free memory was 66.4 MB in the beginning and 328.3 MB in the end (delta: -261.9 MB). Peak memory consumption was 224.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:26,071 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 98.6 MB. Free memory is still 55.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:41:26,072 INFO L168 Benchmark]: CACSL2BoogieTranslator took 715.65 ms. Allocated memory is still 98.6 MB. Free memory was 66.2 MB in the beginning and 58.6 MB in the end (delta: 7.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:26,072 INFO L168 Benchmark]: Boogie Procedure Inliner took 94.85 ms. Allocated memory is still 98.6 MB. Free memory was 58.6 MB in the beginning and 53.1 MB in the end (delta: 5.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:26,072 INFO L168 Benchmark]: Boogie Preprocessor took 123.80 ms. Allocated memory is still 98.6 MB. Free memory was 53.1 MB in the beginning and 48.5 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:26,073 INFO L168 Benchmark]: RCFGBuilder took 2376.39 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 48.5 MB in the beginning and 48.1 MB in the end (delta: 365.9 kB). Peak memory consumption was 38.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:26,073 INFO L168 Benchmark]: TraceAbstraction took 13903.99 ms. Allocated memory was 119.5 MB in the beginning and 377.5 MB in the end (delta: 257.9 MB). Free memory was 47.1 MB in the beginning and 123.9 MB in the end (delta: -76.8 MB). Peak memory consumption was 182.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:26,074 INFO L168 Benchmark]: Witness Printer took 209.24 ms. Allocated memory is still 377.5 MB. Free memory was 123.9 MB in the beginning and 328.3 MB in the end (delta: -204.4 MB). Peak memory consumption was 2.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:26,076 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 98.6 MB. Free memory is still 55.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 715.65 ms. Allocated memory is still 98.6 MB. Free memory was 66.2 MB in the beginning and 58.6 MB in the end (delta: 7.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 94.85 ms. Allocated memory is still 98.6 MB. Free memory was 58.6 MB in the beginning and 53.1 MB in the end (delta: 5.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 123.80 ms. Allocated memory is still 98.6 MB. Free memory was 53.1 MB in the beginning and 48.5 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2376.39 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 48.5 MB in the beginning and 48.1 MB in the end (delta: 365.9 kB). Peak memory consumption was 38.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13903.99 ms. Allocated memory was 119.5 MB in the beginning and 377.5 MB in the end (delta: 257.9 MB). Free memory was 47.1 MB in the beginning and 123.9 MB in the end (delta: -76.8 MB). Peak memory consumption was 182.1 MB. Max. memory is 16.1 GB. * Witness Printer took 209.24 ms. Allocated memory is still 377.5 MB. Free memory was 123.9 MB in the beginning and 328.3 MB in the end (delta: -204.4 MB). Peak memory consumption was 2.2 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: 12.9s, OverallIterations: 13, TraceHistogramMax: 6, AutomataDifference: 7.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 684 SDtfs, 1141 SDslu, 63 SDs, 0 SdLazy, 3018 SolverSat, 730 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1613 GetRequests, 1579 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s 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: 0.4s 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, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 2.0s 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...