./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label54.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_8a9db0a6-c98d-4444-b8ce-3baa86d53b0b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8a9db0a6-c98d-4444-b8ce-3baa86d53b0b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8a9db0a6-c98d-4444-b8ce-3baa86d53b0b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8a9db0a6-c98d-4444-b8ce-3baa86d53b0b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label54.c -s /tmp/vcloud-vcloud-master/worker/run_dir_8a9db0a6-c98d-4444-b8ce-3baa86d53b0b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8a9db0a6-c98d-4444-b8ce-3baa86d53b0b/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 82dff1713e271abdc8f24172a0abd315632e3f42 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 07:25:41,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:25:41,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:25:41,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:25:41,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:25:41,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:25:41,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:25:41,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:25:41,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:25:41,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:25:41,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:25:41,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:25:41,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:25:41,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:25:41,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:25:41,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:25:41,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:25:41,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:25:41,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:25:41,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:25:41,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:25:41,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:25:41,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:25:41,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:25:41,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:25:41,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:25:41,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:25:41,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:25:41,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:25:41,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:25:41,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:25:41,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:25:41,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:25:41,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:25:41,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:25:41,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:25:41,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:25:41,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:25:41,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:25:41,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:25:41,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:25:41,482 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8a9db0a6-c98d-4444-b8ce-3baa86d53b0b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:25:41,522 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:25:41,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:25:41,524 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:25:41,524 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:25:41,524 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:25:41,525 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:25:41,525 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:25:41,525 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:25:41,526 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:25:41,526 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:25:41,527 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:25:41,527 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:25:41,528 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:25:41,528 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:25:41,528 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:25:41,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:25:41,530 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:25:41,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:25:41,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:25:41,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:25:41,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:25:41,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:25:41,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:25:41,531 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:25:41,532 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:25:41,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:25:41,532 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:25:41,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:25:41,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:25:41,533 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:25:41,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:25:41,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:25:41,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:25:41,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:25:41,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:25:41,535 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:25:41,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:25:41,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:25:41,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:25:41,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:25:41,536 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_8a9db0a6-c98d-4444-b8ce-3baa86d53b0b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8a9db0a6-c98d-4444-b8ce-3baa86d53b0b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82dff1713e271abdc8f24172a0abd315632e3f42 [2020-11-28 07:25:41,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:25:41,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:25:41,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:25:41,892 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:25:41,893 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:25:41,894 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8a9db0a6-c98d-4444-b8ce-3baa86d53b0b/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label54.c [2020-11-28 07:25:41,972 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8a9db0a6-c98d-4444-b8ce-3baa86d53b0b/bin/utaipan/data/88a5fc5ba/0f9c1283823342c1a503b08635e806f2/FLAGdd99718f5 [2020-11-28 07:25:42,669 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:25:42,670 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8a9db0a6-c98d-4444-b8ce-3baa86d53b0b/sv-benchmarks/c/eca-rers2012/Problem01_label54.c [2020-11-28 07:25:42,691 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8a9db0a6-c98d-4444-b8ce-3baa86d53b0b/bin/utaipan/data/88a5fc5ba/0f9c1283823342c1a503b08635e806f2/FLAGdd99718f5 [2020-11-28 07:25:42,871 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8a9db0a6-c98d-4444-b8ce-3baa86d53b0b/bin/utaipan/data/88a5fc5ba/0f9c1283823342c1a503b08635e806f2 [2020-11-28 07:25:42,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:25:42,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:25:42,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:25:42,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:25:42,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:25:42,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:25:42" (1/1) ... [2020-11-28 07:25:42,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fa13999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:42, skipping insertion in model container [2020-11-28 07:25:42,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:25:42" (1/1) ... [2020-11-28 07:25:42,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:25:42,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:25:43,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:25:43,437 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:25:43,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:25:43,575 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:25:43,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:43 WrapperNode [2020-11-28 07:25:43,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:25:43,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:25:43,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:25:43,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:25:43,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:43" (1/1) ... [2020-11-28 07:25:43,608 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:43" (1/1) ... [2020-11-28 07:25:43,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:25:43,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:25:43,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:25:43,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:25:43,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:43" (1/1) ... [2020-11-28 07:25:43,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:43" (1/1) ... [2020-11-28 07:25:43,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:43" (1/1) ... [2020-11-28 07:25:43,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:43" (1/1) ... [2020-11-28 07:25:43,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:43" (1/1) ... [2020-11-28 07:25:43,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:43" (1/1) ... [2020-11-28 07:25:43,734 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:43" (1/1) ... [2020-11-28 07:25:43,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:25:43,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:25:43,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:25:43,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:25:43,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8a9db0a6-c98d-4444-b8ce-3baa86d53b0b/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 07:25:43,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:25:43,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:25:43,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:25:43,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:25:45,981 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:25:45,982 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:25:45,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:25:45 BoogieIcfgContainer [2020-11-28 07:25:45,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:25:45,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:25:45,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:25:45,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:25:45,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:25:42" (1/3) ... [2020-11-28 07:25:45,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ed6967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:25:45, skipping insertion in model container [2020-11-28 07:25:45,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:43" (2/3) ... [2020-11-28 07:25:45,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ed6967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:25:45, skipping insertion in model container [2020-11-28 07:25:45,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:25:45" (3/3) ... [2020-11-28 07:25:45,992 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label54.c [2020-11-28 07:25:46,003 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:25:46,007 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:25:46,019 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:25:46,042 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:25:46,043 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:25:46,043 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:25:46,043 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:25:46,043 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:25:46,044 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:25:46,044 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:25:46,044 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:25:46,059 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-28 07:25:46,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-28 07:25:46,068 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:46,068 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 07:25:46,069 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:25:46,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:46,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1520713069, now seen corresponding path program 1 times [2020-11-28 07:25:46,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:46,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477363998] [2020-11-28 07:25:46,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:46,506 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 07:25:46,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477363998] [2020-11-28 07:25:46,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:25:46,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:25:46,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626779736] [2020-11-28 07:25:46,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:25:46,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:46,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:25:46,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:25:46,534 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-28 07:25:47,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:47,149 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-28 07:25:47,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:25:47,153 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-28 07:25:47,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:47,173 INFO L225 Difference]: With dead ends: 224 [2020-11-28 07:25:47,173 INFO L226 Difference]: Without dead ends: 145 [2020-11-28 07:25:47,179 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 07:25:47,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-28 07:25:47,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-28 07:25:47,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-28 07:25:47,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 253 transitions. [2020-11-28 07:25:47,252 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 253 transitions. Word has length 71 [2020-11-28 07:25:47,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:47,253 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 253 transitions. [2020-11-28 07:25:47,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:25:47,253 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 253 transitions. [2020-11-28 07:25:47,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-11-28 07:25:47,259 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:47,260 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-11-28 07:25:47,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:25:47,260 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:25:47,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:47,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1531539289, now seen corresponding path program 1 times [2020-11-28 07:25:47,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:47,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520100181] [2020-11-28 07:25:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 07:25:47,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520100181] [2020-11-28 07:25:47,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:25:47,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:25:47,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531631153] [2020-11-28 07:25:47,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:25:47,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:47,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:25:47,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:25:47,486 INFO L87 Difference]: Start difference. First operand 145 states and 253 transitions. Second operand 3 states. [2020-11-28 07:25:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:48,038 INFO L93 Difference]: Finished difference Result 431 states and 756 transitions. [2020-11-28 07:25:48,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:25:48,039 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-11-28 07:25:48,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:48,043 INFO L225 Difference]: With dead ends: 431 [2020-11-28 07:25:48,043 INFO L226 Difference]: Without dead ends: 287 [2020-11-28 07:25:48,045 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 07:25:48,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-28 07:25:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-11-28 07:25:48,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-28 07:25:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 467 transitions. [2020-11-28 07:25:48,086 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 467 transitions. Word has length 75 [2020-11-28 07:25:48,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:48,087 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 467 transitions. [2020-11-28 07:25:48,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:25:48,087 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 467 transitions. [2020-11-28 07:25:48,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-28 07:25:48,091 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:48,091 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:25:48,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:25:48,092 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:25:48,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:48,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2064958683, now seen corresponding path program 1 times [2020-11-28 07:25:48,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:48,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790242526] [2020-11-28 07:25:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:25:48,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790242526] [2020-11-28 07:25:48,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:25:48,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:25:48,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359515328] [2020-11-28 07:25:48,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:25:48,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:48,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:25:48,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:25:48,249 INFO L87 Difference]: Start difference. First operand 287 states and 467 transitions. Second operand 4 states. [2020-11-28 07:25:49,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:49,150 INFO L93 Difference]: Finished difference Result 715 states and 1141 transitions. [2020-11-28 07:25:49,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:25:49,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-11-28 07:25:49,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:49,156 INFO L225 Difference]: With dead ends: 715 [2020-11-28 07:25:49,156 INFO L226 Difference]: Without dead ends: 429 [2020-11-28 07:25:49,158 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 07:25:49,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-11-28 07:25:49,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2020-11-28 07:25:49,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-11-28 07:25:49,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 639 transitions. [2020-11-28 07:25:49,186 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 639 transitions. Word has length 105 [2020-11-28 07:25:49,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:49,186 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 639 transitions. [2020-11-28 07:25:49,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:25:49,187 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 639 transitions. [2020-11-28 07:25:49,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-11-28 07:25:49,199 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:49,199 INFO L422 BasicCegarLoop]: trace histogram [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, 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 07:25:49,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:25:49,200 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:25:49,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:49,200 INFO L82 PathProgramCache]: Analyzing trace with hash -480428507, now seen corresponding path program 1 times [2020-11-28 07:25:49,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:49,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097435407] [2020-11-28 07:25:49,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-28 07:25:49,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097435407] [2020-11-28 07:25:49,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:25:49,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:25:49,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536649713] [2020-11-28 07:25:49,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:25:49,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:49,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:25:49,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:25:49,299 INFO L87 Difference]: Start difference. First operand 429 states and 639 transitions. Second operand 3 states. [2020-11-28 07:25:49,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:49,735 INFO L93 Difference]: Finished difference Result 999 states and 1479 transitions. [2020-11-28 07:25:49,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:25:49,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 109 [2020-11-28 07:25:49,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:49,739 INFO L225 Difference]: With dead ends: 999 [2020-11-28 07:25:49,739 INFO L226 Difference]: Without dead ends: 571 [2020-11-28 07:25:49,741 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 07:25:49,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-11-28 07:25:49,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 429. [2020-11-28 07:25:49,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-11-28 07:25:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 627 transitions. [2020-11-28 07:25:49,795 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 627 transitions. Word has length 109 [2020-11-28 07:25:49,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:49,797 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 627 transitions. [2020-11-28 07:25:49,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:25:49,797 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 627 transitions. [2020-11-28 07:25:49,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-11-28 07:25:49,802 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:49,802 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:25:49,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:25:49,804 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:25:49,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:49,805 INFO L82 PathProgramCache]: Analyzing trace with hash -363768353, now seen corresponding path program 1 times [2020-11-28 07:25:49,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:49,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125404119] [2020-11-28 07:25:49,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:49,915 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-28 07:25:49,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125404119] [2020-11-28 07:25:49,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:25:49,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:25:49,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878649196] [2020-11-28 07:25:49,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:25:49,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:49,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:25:49,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:25:49,918 INFO L87 Difference]: Start difference. First operand 429 states and 627 transitions. Second operand 4 states. [2020-11-28 07:25:50,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:50,645 INFO L93 Difference]: Finished difference Result 1354 states and 1955 transitions. [2020-11-28 07:25:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:25:50,646 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2020-11-28 07:25:50,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:50,651 INFO L225 Difference]: With dead ends: 1354 [2020-11-28 07:25:50,651 INFO L226 Difference]: Without dead ends: 784 [2020-11-28 07:25:50,652 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 07:25:50,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2020-11-28 07:25:50,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2020-11-28 07:25:50,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2020-11-28 07:25:50,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 998 transitions. [2020-11-28 07:25:50,690 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 998 transitions. Word has length 113 [2020-11-28 07:25:50,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:50,691 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 998 transitions. [2020-11-28 07:25:50,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:25:50,691 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 998 transitions. [2020-11-28 07:25:50,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-11-28 07:25:50,694 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:50,695 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:25:50,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:25:50,696 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:25:50,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:50,697 INFO L82 PathProgramCache]: Analyzing trace with hash -338581899, now seen corresponding path program 1 times [2020-11-28 07:25:50,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:50,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810823769] [2020-11-28 07:25:50,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-11-28 07:25:50,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810823769] [2020-11-28 07:25:50,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:25:50,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:25:50,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326384596] [2020-11-28 07:25:50,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:25:50,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:50,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:25:50,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:25:50,802 INFO L87 Difference]: Start difference. First operand 784 states and 998 transitions. Second operand 3 states. [2020-11-28 07:25:51,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:51,358 INFO L93 Difference]: Finished difference Result 1851 states and 2333 transitions. [2020-11-28 07:25:51,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:25:51,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-11-28 07:25:51,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:51,369 INFO L225 Difference]: With dead ends: 1851 [2020-11-28 07:25:51,369 INFO L226 Difference]: Without dead ends: 1068 [2020-11-28 07:25:51,370 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 07:25:51,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2020-11-28 07:25:51,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 926. [2020-11-28 07:25:51,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2020-11-28 07:25:51,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1175 transitions. [2020-11-28 07:25:51,401 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1175 transitions. Word has length 122 [2020-11-28 07:25:51,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:51,402 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1175 transitions. [2020-11-28 07:25:51,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:25:51,407 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1175 transitions. [2020-11-28 07:25:51,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-11-28 07:25:51,413 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:51,413 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:25:51,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:25:51,414 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:25:51,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:51,414 INFO L82 PathProgramCache]: Analyzing trace with hash -618939587, now seen corresponding path program 1 times [2020-11-28 07:25:51,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:51,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788871881] [2020-11-28 07:25:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-11-28 07:25:51,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788871881] [2020-11-28 07:25:51,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:25:51,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:25:51,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910312461] [2020-11-28 07:25:51,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:25:51,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:51,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:25:51,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:25:51,553 INFO L87 Difference]: Start difference. First operand 926 states and 1175 transitions. Second operand 3 states. [2020-11-28 07:25:52,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:52,044 INFO L93 Difference]: Finished difference Result 1851 states and 2349 transitions. [2020-11-28 07:25:52,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:25:52,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-11-28 07:25:52,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:52,051 INFO L225 Difference]: With dead ends: 1851 [2020-11-28 07:25:52,051 INFO L226 Difference]: Without dead ends: 926 [2020-11-28 07:25:52,054 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 07:25:52,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-11-28 07:25:52,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 926. [2020-11-28 07:25:52,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2020-11-28 07:25:52,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1161 transitions. [2020-11-28 07:25:52,087 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1161 transitions. Word has length 138 [2020-11-28 07:25:52,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:52,088 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1161 transitions. [2020-11-28 07:25:52,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:25:52,088 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1161 transitions. [2020-11-28 07:25:52,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-11-28 07:25:52,092 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:52,092 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 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] [2020-11-28 07:25:52,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:25:52,092 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:25:52,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:52,093 INFO L82 PathProgramCache]: Analyzing trace with hash -2031263963, now seen corresponding path program 1 times [2020-11-28 07:25:52,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:52,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012466879] [2020-11-28 07:25:52,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-11-28 07:25:52,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012466879] [2020-11-28 07:25:52,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:25:52,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:25:52,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72080497] [2020-11-28 07:25:52,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:25:52,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:52,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:25:52,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:25:52,251 INFO L87 Difference]: Start difference. First operand 926 states and 1161 transitions. Second operand 4 states. [2020-11-28 07:25:52,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:52,949 INFO L93 Difference]: Finished difference Result 1922 states and 2403 transitions. [2020-11-28 07:25:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:25:52,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2020-11-28 07:25:52,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:52,957 INFO L225 Difference]: With dead ends: 1922 [2020-11-28 07:25:52,957 INFO L226 Difference]: Without dead ends: 997 [2020-11-28 07:25:52,959 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 07:25:52,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-11-28 07:25:52,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2020-11-28 07:25:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-11-28 07:25:52,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1230 transitions. [2020-11-28 07:25:52,993 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1230 transitions. Word has length 154 [2020-11-28 07:25:52,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:52,995 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1230 transitions. [2020-11-28 07:25:52,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:25:52,995 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1230 transitions. [2020-11-28 07:25:52,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-11-28 07:25:52,999 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:52,999 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:25:52,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:25:53,001 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:25:53,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:53,002 INFO L82 PathProgramCache]: Analyzing trace with hash -536182670, now seen corresponding path program 1 times [2020-11-28 07:25:53,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:53,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731742270] [2020-11-28 07:25:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-11-28 07:25:53,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731742270] [2020-11-28 07:25:53,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:25:53,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:25:53,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384477545] [2020-11-28 07:25:53,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:25:53,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:53,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:25:53,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:25:53,145 INFO L87 Difference]: Start difference. First operand 997 states and 1230 transitions. Second operand 3 states. [2020-11-28 07:25:53,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:53,549 INFO L93 Difference]: Finished difference Result 2277 states and 2824 transitions. [2020-11-28 07:25:53,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:25:53,550 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2020-11-28 07:25:53,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:53,558 INFO L225 Difference]: With dead ends: 2277 [2020-11-28 07:25:53,559 INFO L226 Difference]: Without dead ends: 1281 [2020-11-28 07:25:53,560 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 07:25:53,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-11-28 07:25:53,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1139. [2020-11-28 07:25:53,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:25:53,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1415 transitions. [2020-11-28 07:25:53,595 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1415 transitions. Word has length 171 [2020-11-28 07:25:53,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:53,595 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1415 transitions. [2020-11-28 07:25:53,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:25:53,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1415 transitions. [2020-11-28 07:25:53,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-28 07:25:53,600 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:53,601 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-28 07:25:53,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 07:25:53,601 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:25:53,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:53,602 INFO L82 PathProgramCache]: Analyzing trace with hash 223932725, now seen corresponding path program 1 times [2020-11-28 07:25:53,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:53,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272198213] [2020-11-28 07:25:53,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:54,012 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 63 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:25:54,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272198213] [2020-11-28 07:25:54,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063409865] [2020-11-28 07:25:54,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8a9db0a6-c98d-4444-b8ce-3baa86d53b0b/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 07:25:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:54,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:25:54,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:25:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-28 07:25:54,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:25:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-28 07:25:54,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:25:54,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-11-28 07:25:54,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211749453] [2020-11-28 07:25:54,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:25:54,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:54,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:25:54,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:25:54,528 INFO L87 Difference]: Start difference. First operand 1139 states and 1415 transitions. Second operand 3 states. [2020-11-28 07:25:55,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:55,025 INFO L93 Difference]: Finished difference Result 2277 states and 2829 transitions. [2020-11-28 07:25:55,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:25:55,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2020-11-28 07:25:55,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:55,034 INFO L225 Difference]: With dead ends: 2277 [2020-11-28 07:25:55,034 INFO L226 Difference]: Without dead ends: 1139 [2020-11-28 07:25:55,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:25:55,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-28 07:25:55,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 997. [2020-11-28 07:25:55,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-11-28 07:25:55,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1184 transitions. [2020-11-28 07:25:55,072 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1184 transitions. Word has length 175 [2020-11-28 07:25:55,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:55,073 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1184 transitions. [2020-11-28 07:25:55,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:25:55,073 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1184 transitions. [2020-11-28 07:25:55,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-11-28 07:25:55,078 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:55,078 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, 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] [2020-11-28 07:25:55,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-28 07:25:55,288 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:25:55,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:55,289 INFO L82 PathProgramCache]: Analyzing trace with hash 677814523, now seen corresponding path program 1 times [2020-11-28 07:25:55,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:55,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018406592] [2020-11-28 07:25:55,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-11-28 07:25:55,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018406592] [2020-11-28 07:25:55,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:25:55,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:25:55,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714159193] [2020-11-28 07:25:55,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:25:55,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:55,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:25:55,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:25:55,510 INFO L87 Difference]: Start difference. First operand 997 states and 1184 transitions. Second operand 4 states. [2020-11-28 07:25:56,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:56,032 INFO L93 Difference]: Finished difference Result 2238 states and 2639 transitions. [2020-11-28 07:25:56,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:25:56,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 220 [2020-11-28 07:25:56,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:56,041 INFO L225 Difference]: With dead ends: 2238 [2020-11-28 07:25:56,041 INFO L226 Difference]: Without dead ends: 1242 [2020-11-28 07:25:56,043 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 07:25:56,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2020-11-28 07:25:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1139. [2020-11-28 07:25:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:25:56,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1334 transitions. [2020-11-28 07:25:56,086 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1334 transitions. Word has length 220 [2020-11-28 07:25:56,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:56,086 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1334 transitions. [2020-11-28 07:25:56,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:25:56,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1334 transitions. [2020-11-28 07:25:56,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-11-28 07:25:56,092 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:56,092 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 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, 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, 1] [2020-11-28 07:25:56,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 07:25:56,093 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:25:56,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:56,093 INFO L82 PathProgramCache]: Analyzing trace with hash 733156002, now seen corresponding path program 1 times [2020-11-28 07:25:56,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:56,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336236207] [2020-11-28 07:25:56,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-11-28 07:25:56,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336236207] [2020-11-28 07:25:56,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:25:56,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:25:56,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030707832] [2020-11-28 07:25:56,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:25:56,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:56,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:25:56,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:25:56,253 INFO L87 Difference]: Start difference. First operand 1139 states and 1334 transitions. Second operand 3 states. [2020-11-28 07:25:56,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:56,651 INFO L93 Difference]: Finished difference Result 2277 states and 2667 transitions. [2020-11-28 07:25:56,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:25:56,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-11-28 07:25:56,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:56,658 INFO L225 Difference]: With dead ends: 2277 [2020-11-28 07:25:56,659 INFO L226 Difference]: Without dead ends: 1139 [2020-11-28 07:25:56,661 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 07:25:56,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-28 07:25:56,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2020-11-28 07:25:56,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:25:56,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1303 transitions. [2020-11-28 07:25:56,698 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1303 transitions. Word has length 233 [2020-11-28 07:25:56,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:56,699 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1303 transitions. [2020-11-28 07:25:56,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:25:56,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1303 transitions. [2020-11-28 07:25:56,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-11-28 07:25:56,705 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:56,706 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, 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, 1] [2020-11-28 07:25:56,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-28 07:25:56,706 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:25:56,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:56,707 INFO L82 PathProgramCache]: Analyzing trace with hash -995890108, now seen corresponding path program 1 times [2020-11-28 07:25:56,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:56,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171410356] [2020-11-28 07:25:56,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-11-28 07:25:56,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171410356] [2020-11-28 07:25:56,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:25:56,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:25:56,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704139505] [2020-11-28 07:25:56,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:25:56,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:56,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:25:56,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:25:56,928 INFO L87 Difference]: Start difference. First operand 1139 states and 1303 transitions. Second operand 3 states. [2020-11-28 07:25:57,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:57,360 INFO L93 Difference]: Finished difference Result 2488 states and 2834 transitions. [2020-11-28 07:25:57,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:25:57,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 242 [2020-11-28 07:25:57,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:57,363 INFO L225 Difference]: With dead ends: 2488 [2020-11-28 07:25:57,363 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:25:57,365 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 07:25:57,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:25:57,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:25:57,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:25:57,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:25:57,366 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 242 [2020-11-28 07:25:57,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:57,366 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:25:57,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:25:57,367 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:25:57,367 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:25:57,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-28 07:25:57,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:25:58,120 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-11-28 07:25:58,598 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2020-11-28 07:25:58,602 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-28 07:25:58,603 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-28 07:25:58,603 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-28 07:25:58,603 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-28 07:25:58,603 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-28 07:25:58,603 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-28 07:25:58,603 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-28 07:25:58,603 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-28 07:25:58,603 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-28 07:25:58,603 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-28 07:25:58,603 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-28 07:25:58,604 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-28 07:25:58,604 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-28 07:25:58,604 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-28 07:25:58,604 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-28 07:25:58,604 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-28 07:25:58,604 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-28 07:25:58,604 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-28 07:25:58,604 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-28 07:25:58,604 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-28 07:25:58,604 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-28 07:25:58,604 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-28 07:25:58,604 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-28 07:25:58,605 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-28 07:25:58,605 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-28 07:25:58,605 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-28 07:25:58,605 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-28 07:25:58,605 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-28 07:25:58,605 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-28 07:25:58,605 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-28 07:25:58,605 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-28 07:25:58,605 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-28 07:25:58,605 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-28 07:25:58,605 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-28 07:25:58,605 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-28 07:25:58,606 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-28 07:25:58,606 INFO L274 CegarLoopResult]: For program point L548-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:25:58,606 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:25:58,606 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-28 07:25:58,606 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-28 07:25:58,606 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-28 07:25:58,607 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse6 (= ~a20~0 1))) (let ((.cse7 (= ~a16~0 6)) (.cse1 (not (= ~a7~0 1))) (.cse5 (= ~a21~0 1)) (.cse10 (<= ~a16~0 4)) (.cse4 (= ~a17~0 1)) (.cse9 (<= ~a8~0 13)) (.cse3 (<= 15 ~a8~0)) (.cse0 (<= ~a16~0 5)) (.cse8 (<= ~a17~0 0)) (.cse2 (not .cse6))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse5 .cse6 .cse1 .cse4) (and .cse7 .cse8 .cse6 .cse9) (and .cse7 .cse1 .cse2 .cse3 .cse4) (and .cse5 .cse8 .cse6) (and .cse10 .cse8 .cse9) (and .cse5 .cse10 .cse6 .cse4) (and .cse0 .cse4 .cse9) (and .cse8 .cse2 .cse3) (and .cse0 .cse8 .cse2)))) [2020-11-28 07:25:58,607 INFO L274 CegarLoopResult]: For program point L551-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:25:58,607 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-28 07:25:58,607 INFO L274 CegarLoopResult]: For program point L552(line 552) no Hoare annotation was computed. [2020-11-28 07:25:58,607 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-28 07:25:58,607 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-28 07:25:58,607 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-28 07:25:58,607 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-28 07:25:58,607 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-28 07:25:58,607 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-28 07:25:58,607 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:25:58,607 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-28 07:25:58,608 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-28 07:25:58,608 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-28 07:25:58,608 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-28 07:25:58,611 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-28 07:25:58,611 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-28 07:25:58,611 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-28 07:25:58,611 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-28 07:25:58,612 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-28 07:25:58,612 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-28 07:25:58,612 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-28 07:25:58,613 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-28 07:25:58,613 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-28 07:25:58,613 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-28 07:25:58,613 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-28 07:25:58,615 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse6 (= ~a20~0 1))) (let ((.cse7 (= ~a16~0 6)) (.cse1 (not (= ~a7~0 1))) (.cse5 (= ~a21~0 1)) (.cse10 (<= ~a16~0 4)) (.cse4 (= ~a17~0 1)) (.cse9 (<= ~a8~0 13)) (.cse3 (<= 15 ~a8~0)) (.cse0 (<= ~a16~0 5)) (.cse8 (<= ~a17~0 0)) (.cse2 (not .cse6))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse5 .cse6 .cse1 .cse4) (and .cse7 .cse8 .cse6 .cse9) (and .cse7 .cse1 .cse2 .cse3 .cse4) (and .cse5 .cse8 .cse6) (and .cse10 .cse8 .cse9) (and .cse5 .cse10 .cse6 .cse4) (and .cse0 .cse4 .cse9) (and .cse8 .cse2 .cse3) (and .cse0 .cse8 .cse2)))) [2020-11-28 07:25:58,615 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-28 07:25:58,616 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:25:58,616 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-28 07:25:58,616 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-28 07:25:58,616 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-28 07:25:58,616 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-28 07:25:58,616 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-28 07:25:58,616 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-28 07:25:58,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:25:58 BoogieIcfgContainer [2020-11-28 07:25:58,659 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:25:58,660 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:25:58,672 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:25:58,672 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:25:58,673 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:25:45" (3/4) ... [2020-11-28 07:25:58,676 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:25:58,717 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 103 nodes and edges [2020-11-28 07:25:58,720 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-11-28 07:25:58,722 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-28 07:25:58,724 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-28 07:25:58,898 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8a9db0a6-c98d-4444-b8ce-3baa86d53b0b/bin/utaipan/witness.graphml [2020-11-28 07:25:58,898 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:25:58,899 INFO L168 Benchmark]: Toolchain (without parser) took 16023.97 ms. Allocated memory was 86.0 MB in the beginning and 339.7 MB in the end (delta: 253.8 MB). Free memory was 53.9 MB in the beginning and 151.4 MB in the end (delta: -97.5 MB). Peak memory consumption was 155.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:58,899 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 86.0 MB. Free memory was 45.5 MB in the beginning and 45.4 MB in the end (delta: 34.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:25:58,900 INFO L168 Benchmark]: CACSL2BoogieTranslator took 689.68 ms. Allocated memory is still 86.0 MB. Free memory was 53.6 MB in the beginning and 46.9 MB in the end (delta: 6.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:58,900 INFO L168 Benchmark]: Boogie Procedure Inliner took 96.67 ms. Allocated memory is still 86.0 MB. Free memory was 46.9 MB in the beginning and 41.3 MB in the end (delta: 5.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:58,900 INFO L168 Benchmark]: Boogie Preprocessor took 65.18 ms. Allocated memory is still 86.0 MB. Free memory was 41.3 MB in the beginning and 36.8 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:58,901 INFO L168 Benchmark]: RCFGBuilder took 2241.36 ms. Allocated memory was 86.0 MB in the beginning and 140.5 MB in the end (delta: 54.5 MB). Free memory was 36.4 MB in the beginning and 92.8 MB in the end (delta: -56.4 MB). Peak memory consumption was 34.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:58,901 INFO L168 Benchmark]: TraceAbstraction took 12673.22 ms. Allocated memory was 140.5 MB in the beginning and 339.7 MB in the end (delta: 199.2 MB). Free memory was 92.8 MB in the beginning and 167.2 MB in the end (delta: -74.3 MB). Peak memory consumption was 125.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:58,902 INFO L168 Benchmark]: Witness Printer took 238.40 ms. Allocated memory is still 339.7 MB. Free memory was 167.2 MB in the beginning and 151.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:58,905 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 86.0 MB. Free memory was 45.5 MB in the beginning and 45.4 MB in the end (delta: 34.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 689.68 ms. Allocated memory is still 86.0 MB. Free memory was 53.6 MB in the beginning and 46.9 MB in the end (delta: 6.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 96.67 ms. Allocated memory is still 86.0 MB. Free memory was 46.9 MB in the beginning and 41.3 MB in the end (delta: 5.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 65.18 ms. Allocated memory is still 86.0 MB. Free memory was 41.3 MB in the beginning and 36.8 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2241.36 ms. Allocated memory was 86.0 MB in the beginning and 140.5 MB in the end (delta: 54.5 MB). Free memory was 36.4 MB in the beginning and 92.8 MB in the end (delta: -56.4 MB). Peak memory consumption was 34.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12673.22 ms. Allocated memory was 140.5 MB in the beginning and 339.7 MB in the end (delta: 199.2 MB). Free memory was 92.8 MB in the beginning and 167.2 MB in the end (delta: -74.3 MB). Peak memory consumption was 125.9 MB. Max. memory is 16.1 GB. * Witness Printer took 238.40 ms. Allocated memory is still 339.7 MB. Free memory was 167.2 MB in the beginning and 151.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((((a16 <= 5 && !(a7 == 1)) && !(a20 == 1)) && 15 <= a8) && a17 == 1) || (((a21 == 1 && a20 == 1) && !(a7 == 1)) && a17 == 1)) || (((a16 == 6 && a17 <= 0) && a20 == 1) && a8 <= 13)) || ((((a16 == 6 && !(a7 == 1)) && !(a20 == 1)) && 15 <= a8) && a17 == 1)) || ((a21 == 1 && a17 <= 0) && a20 == 1)) || ((a16 <= 4 && a17 <= 0) && a8 <= 13)) || (((a21 == 1 && a16 <= 4) && a20 == 1) && a17 == 1)) || ((a16 <= 5 && a17 == 1) && a8 <= 13)) || ((a17 <= 0 && !(a20 == 1)) && 15 <= a8)) || ((a16 <= 5 && a17 <= 0) && !(a20 == 1)) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((((((a16 <= 5 && !(a7 == 1)) && !(a20 == 1)) && 15 <= a8) && a17 == 1) || (((a21 == 1 && a20 == 1) && !(a7 == 1)) && a17 == 1)) || (((a16 == 6 && a17 <= 0) && a20 == 1) && a8 <= 13)) || ((((a16 == 6 && !(a7 == 1)) && !(a20 == 1)) && 15 <= a8) && a17 == 1)) || ((a21 == 1 && a17 <= 0) && a20 == 1)) || ((a16 <= 4 && a17 <= 0) && a8 <= 13)) || (((a21 == 1 && a16 <= 4) && a20 == 1) && a17 == 1)) || ((a16 <= 5 && a17 == 1) && a8 <= 13)) || ((a17 <= 0 && !(a20 == 1)) && 15 <= a8)) || ((a16 <= 5 && a17 <= 0) && !(a20 == 1)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.3s, OverallIterations: 13, TraceHistogramMax: 7, AutomataDifference: 7.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 692 SDtfs, 914 SDslu, 59 SDs, 0 SdLazy, 3006 SolverSat, 748 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 386 GetRequests, 364 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1139occurred in iteration=9, 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, 671 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 47 NumberOfFragments, 259 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2723 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 479 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 2103 NumberOfCodeBlocks, 2103 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 2263 ConstructedInterpolants, 0 QuantifiedInterpolants, 1352615 SizeOfPredicates, 1 NumberOfNonLiveVariables, 397 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 15 InterpolantComputations, 14 PerfectInterpolantSequences, 2117/2209 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...