./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Introduction.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Introduction.c -s /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 85017c4a5a64f245bd703090448e8d5785d54b75 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 07:37:42,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:37:42,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:37:42,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:37:42,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:37:42,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:37:42,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:37:42,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:37:42,491 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:37:42,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:37:42,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:37:42,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:37:42,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:37:42,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:37:42,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:37:42,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:37:42,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:37:42,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:37:42,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:37:42,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:37:42,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:37:42,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:37:42,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:37:42,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:37:42,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:37:42,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:37:42,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:37:42,557 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:37:42,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:37:42,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:37:42,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:37:42,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:37:42,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:37:42,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:37:42,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:37:42,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:37:42,566 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:37:42,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:37:42,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:37:42,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:37:42,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:37:42,571 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-11-28 07:37:42,609 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:37:42,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:37:42,611 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:37:42,613 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:37:42,613 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:37:42,613 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:37:42,614 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:37:42,614 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:37:42,614 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:37:42,614 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:37:42,616 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:37:42,616 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:37:42,616 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:37:42,617 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:37:42,617 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:37:42,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:37:42,618 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:37:42,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:37:42,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:37:42,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:37:42,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:37:42,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:37:42,620 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-28 07:37:42,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:37:42,621 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:37:42,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:37:42,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:37:42,622 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:37:42,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:37:42,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:37:42,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:37:42,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:37:42,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:37:42,624 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:37:42,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:37:42,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:37:42,624 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:37:42,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:37:42,625 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_43cdf4de-1206-4c94-807b-9a933e75f6c0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85017c4a5a64f245bd703090448e8d5785d54b75 [2020-11-28 07:37:42,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:37:42,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:37:42,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:37:42,989 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:37:42,996 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:37:42,997 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Introduction.c [2020-11-28 07:37:43,076 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/bin/utaipan/data/8afed957b/7de6b84736b440f098c633b18ebdaba2/FLAGe634ceeff [2020-11-28 07:37:43,608 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:37:43,608 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Introduction.c [2020-11-28 07:37:43,614 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/bin/utaipan/data/8afed957b/7de6b84736b440f098c633b18ebdaba2/FLAGe634ceeff [2020-11-28 07:37:44,005 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/bin/utaipan/data/8afed957b/7de6b84736b440f098c633b18ebdaba2 [2020-11-28 07:37:44,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:37:44,015 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:37:44,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:37:44,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:37:44,024 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:37:44,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:37:44" (1/1) ... [2020-11-28 07:37:44,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6730851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:44, skipping insertion in model container [2020-11-28 07:37:44,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:37:44" (1/1) ... [2020-11-28 07:37:44,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:37:44,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:37:44,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:37:44,206 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:37:44,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:37:44,242 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:37:44,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:44 WrapperNode [2020-11-28 07:37:44,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:37:44,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:37:44,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:37:44,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:37:44,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:44" (1/1) ... [2020-11-28 07:37:44,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:44" (1/1) ... [2020-11-28 07:37:44,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:37:44,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:37:44,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:37:44,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:37:44,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:44" (1/1) ... [2020-11-28 07:37:44,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:44" (1/1) ... [2020-11-28 07:37:44,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:44" (1/1) ... [2020-11-28 07:37:44,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:44" (1/1) ... [2020-11-28 07:37:44,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:44" (1/1) ... [2020-11-28 07:37:44,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:44" (1/1) ... [2020-11-28 07:37:44,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:44" (1/1) ... [2020-11-28 07:37:44,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:37:44,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:37:44,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:37:44,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:37:44,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/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 07:37:44,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:37:44,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:37:44,738 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:37:44,738 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-28 07:37:44,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:37:44 BoogieIcfgContainer [2020-11-28 07:37:44,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:37:44,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:37:44,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:37:44,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:37:44,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:37:44" (1/3) ... [2020-11-28 07:37:44,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ff6677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:37:44, skipping insertion in model container [2020-11-28 07:37:44,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:44" (2/3) ... [2020-11-28 07:37:44,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ff6677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:37:44, skipping insertion in model container [2020-11-28 07:37:44,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:37:44" (3/3) ... [2020-11-28 07:37:44,752 INFO L111 eAbstractionObserver]: Analyzing ICFG BrockschmidtCookFuhs-CAV2013-Introduction.c [2020-11-28 07:37:44,766 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:37:44,784 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-28 07:37:44,799 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-28 07:37:44,828 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:37:44,829 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:37:44,843 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:37:44,844 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:37:44,844 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:37:44,844 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:37:44,845 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:37:44,845 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:37:44,867 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-11-28 07:37:44,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:37:44,872 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:44,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:37:44,874 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:37:44,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:44,882 INFO L82 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2020-11-28 07:37:44,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:44,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311951808] [2020-11-28 07:37:44,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:45,052 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 07:37:45,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311951808] [2020-11-28 07:37:45,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:45,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:37:45,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761907472] [2020-11-28 07:37:45,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:37:45,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:45,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:37:45,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:37:45,086 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-11-28 07:37:45,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:45,195 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2020-11-28 07:37:45,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:37:45,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 07:37:45,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:45,205 INFO L225 Difference]: With dead ends: 16 [2020-11-28 07:37:45,205 INFO L226 Difference]: Without dead ends: 13 [2020-11-28 07:37:45,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 07:37:45,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-28 07:37:45,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-11-28 07:37:45,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 07:37:45,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-28 07:37:45,238 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 3 [2020-11-28 07:37:45,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:45,239 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-28 07:37:45,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:37:45,239 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-28 07:37:45,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:37:45,239 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:45,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:37:45,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:37:45,240 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:37:45,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:45,241 INFO L82 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2020-11-28 07:37:45,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:45,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013315001] [2020-11-28 07:37:45,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:45,291 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 07:37:45,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013315001] [2020-11-28 07:37:45,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:45,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:37:45,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256215756] [2020-11-28 07:37:45,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:37:45,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:45,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:37:45,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:37:45,295 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2020-11-28 07:37:45,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:45,376 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2020-11-28 07:37:45,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:37:45,377 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-28 07:37:45,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:45,377 INFO L225 Difference]: With dead ends: 17 [2020-11-28 07:37:45,377 INFO L226 Difference]: Without dead ends: 15 [2020-11-28 07:37:45,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:37:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-28 07:37:45,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-11-28 07:37:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-28 07:37:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-11-28 07:37:45,382 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 4 [2020-11-28 07:37:45,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:45,382 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-11-28 07:37:45,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:37:45,382 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-11-28 07:37:45,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:37:45,383 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:45,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:37:45,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:37:45,400 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:37:45,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:45,402 INFO L82 PathProgramCache]: Analyzing trace with hash 925739501, now seen corresponding path program 1 times [2020-11-28 07:37:45,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:45,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70317682] [2020-11-28 07:37:45,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:45,442 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 07:37:45,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70317682] [2020-11-28 07:37:45,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:45,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:37:45,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526226306] [2020-11-28 07:37:45,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:37:45,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:45,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:37:45,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:37:45,445 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 3 states. [2020-11-28 07:37:45,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:45,536 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-11-28 07:37:45,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:37:45,537 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-28 07:37:45,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:45,538 INFO L225 Difference]: With dead ends: 14 [2020-11-28 07:37:45,538 INFO L226 Difference]: Without dead ends: 13 [2020-11-28 07:37:45,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 07:37:45,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-28 07:37:45,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-28 07:37:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-28 07:37:45,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-11-28 07:37:45,542 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 6 [2020-11-28 07:37:45,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:45,542 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-11-28 07:37:45,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:37:45,542 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-11-28 07:37:45,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:37:45,543 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:45,543 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:45,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:37:45,543 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:37:45,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:45,544 INFO L82 PathProgramCache]: Analyzing trace with hash 577431471, now seen corresponding path program 1 times [2020-11-28 07:37:45,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:45,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302389131] [2020-11-28 07:37:45,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:45,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302389131] [2020-11-28 07:37:45,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311974335] [2020-11-28 07:37:45,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/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 07:37:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:45,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 07:37:45,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:45,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:45,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:37:45,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2020-11-28 07:37:45,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030925680] [2020-11-28 07:37:45,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:37:45,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:45,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:37:45,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:37:45,831 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-11-28 07:37:45,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:45,917 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-11-28 07:37:45,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:37:45,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-28 07:37:45,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:45,919 INFO L225 Difference]: With dead ends: 14 [2020-11-28 07:37:45,920 INFO L226 Difference]: Without dead ends: 13 [2020-11-28 07:37:45,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2020-11-28 07:37:45,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-28 07:37:45,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-11-28 07:37:45,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 07:37:45,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-28 07:37:45,924 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2020-11-28 07:37:45,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:45,924 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-28 07:37:45,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:37:45,924 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-28 07:37:45,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:37:45,925 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:45,925 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2020-11-28 07:37:46,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:46,136 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:37:46,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:46,137 INFO L82 PathProgramCache]: Analyzing trace with hash 720506461, now seen corresponding path program 1 times [2020-11-28 07:37:46,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:46,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653925895] [2020-11-28 07:37:46,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:46,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653925895] [2020-11-28 07:37:46,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230800508] [2020-11-28 07:37:46,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:46,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 07:37:46,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:46,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:46,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1889762341] [2020-11-28 07:37:46,317 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:37:46,318 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:37:46,324 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:37:46,330 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:37:46,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:37:46,758 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:37:47,021 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-11-28 07:37:47,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:37:47,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 11 [2020-11-28 07:37:47,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918156324] [2020-11-28 07:37:47,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:37:47,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:47,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:37:47,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-11-28 07:37:47,145 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-11-28 07:37:47,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:47,413 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-11-28 07:37:47,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:37:47,414 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-28 07:37:47,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:47,415 INFO L225 Difference]: With dead ends: 12 [2020-11-28 07:37:47,415 INFO L226 Difference]: Without dead ends: 11 [2020-11-28 07:37:47,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-11-28 07:37:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-28 07:37:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-28 07:37:47,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-28 07:37:47,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-11-28 07:37:47,419 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-11-28 07:37:47,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:47,420 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-11-28 07:37:47,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:37:47,420 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-11-28 07:37:47,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:37:47,421 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:47,421 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2020-11-28 07:37:47,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:47,622 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:37:47,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:47,622 INFO L82 PathProgramCache]: Analyzing trace with hash 860863857, now seen corresponding path program 1 times [2020-11-28 07:37:47,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:47,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728476007] [2020-11-28 07:37:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:47,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728476007] [2020-11-28 07:37:47,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854172561] [2020-11-28 07:37:47,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:47,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:37:47,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:47,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:47,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1449521546] [2020-11-28 07:37:47,752 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:37:47,752 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:37:47,752 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:37:47,752 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:37:47,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:37:47,922 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:37:48,197 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:37:48,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:37:48,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-11-28 07:37:48,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105014325] [2020-11-28 07:37:48,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:37:48,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:48,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:37:48,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:37:48,199 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2020-11-28 07:37:48,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:48,253 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-11-28 07:37:48,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:37:48,253 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-28 07:37:48,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:48,254 INFO L225 Difference]: With dead ends: 27 [2020-11-28 07:37:48,254 INFO L226 Difference]: Without dead ends: 26 [2020-11-28 07:37:48,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:37:48,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-28 07:37:48,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-28 07:37:48,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-28 07:37:48,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-11-28 07:37:48,262 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 10 [2020-11-28 07:37:48,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:48,263 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-11-28 07:37:48,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:37:48,263 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-11-28 07:37:48,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 07:37:48,264 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:48,264 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1] [2020-11-28 07:37:48,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-28 07:37:48,484 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:37:48,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:48,484 INFO L82 PathProgramCache]: Analyzing trace with hash -333652957, now seen corresponding path program 2 times [2020-11-28 07:37:48,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:48,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592362474] [2020-11-28 07:37:48,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:48,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592362474] [2020-11-28 07:37:48,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428103659] [2020-11-28 07:37:48,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:48,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-28 07:37:48,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:37:48,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 07:37:48,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:48,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:48,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1245709385] [2020-11-28 07:37:48,720 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:37:48,720 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:37:48,721 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:37:48,721 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:37:48,721 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:37:48,851 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:37:49,089 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-11-28 07:37:49,267 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:37:49,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:37:49,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-11-28 07:37:49,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368994640] [2020-11-28 07:37:49,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 07:37:49,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:49,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 07:37:49,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:37:49,270 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 12 states. [2020-11-28 07:37:49,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:49,403 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-11-28 07:37:49,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 07:37:49,404 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-11-28 07:37:49,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:49,405 INFO L225 Difference]: With dead ends: 57 [2020-11-28 07:37:49,405 INFO L226 Difference]: Without dead ends: 56 [2020-11-28 07:37:49,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:37:49,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-28 07:37:49,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-11-28 07:37:49,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-28 07:37:49,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-11-28 07:37:49,424 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 25 [2020-11-28 07:37:49,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:49,425 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-11-28 07:37:49,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 07:37:49,425 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-11-28 07:37:49,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-28 07:37:49,427 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:49,428 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1] [2020-11-28 07:37:49,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:49,652 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:37:49,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:49,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1266934173, now seen corresponding path program 3 times [2020-11-28 07:37:49,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:49,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521273467] [2020-11-28 07:37:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:49,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521273467] [2020-11-28 07:37:49,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357252781] [2020-11-28 07:37:49,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:49,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 07:37:49,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:37:49,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 07:37:49,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:50,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:50,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [573297644] [2020-11-28 07:37:50,324 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:37:50,325 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:37:50,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:37:50,325 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:37:50,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:37:50,438 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:37:50,906 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:37:50,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:37:50,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2020-11-28 07:37:50,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390103541] [2020-11-28 07:37:50,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-28 07:37:50,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:50,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-28 07:37:50,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-11-28 07:37:50,909 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 24 states. [2020-11-28 07:37:51,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:51,158 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2020-11-28 07:37:51,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-28 07:37:51,158 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-11-28 07:37:51,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:51,161 INFO L225 Difference]: With dead ends: 117 [2020-11-28 07:37:51,161 INFO L226 Difference]: Without dead ends: 116 [2020-11-28 07:37:51,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 136 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-11-28 07:37:51,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-11-28 07:37:51,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-11-28 07:37:51,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-11-28 07:37:51,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2020-11-28 07:37:51,183 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 55 [2020-11-28 07:37:51,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:51,184 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2020-11-28 07:37:51,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-28 07:37:51,184 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2020-11-28 07:37:51,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-28 07:37:51,192 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:51,192 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1] [2020-11-28 07:37:51,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-11-28 07:37:51,412 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:37:51,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:51,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1393971939, now seen corresponding path program 4 times [2020-11-28 07:37:51,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:51,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894305272] [2020-11-28 07:37:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:51,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894305272] [2020-11-28 07:37:51,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795816790] [2020-11-28 07:37:51,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:52,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-28 07:37:52,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:52,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:53,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [242810339] [2020-11-28 07:37:53,116 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:37:53,116 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:37:53,117 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:37:53,117 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:37:53,117 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:37:53,225 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:37:54,370 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:37:54,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:37:54,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2020-11-28 07:37:54,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915408593] [2020-11-28 07:37:54,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-11-28 07:37:54,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:54,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-11-28 07:37:54,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1142, Invalid=1614, Unknown=0, NotChecked=0, Total=2756 [2020-11-28 07:37:54,375 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 48 states. [2020-11-28 07:37:54,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:54,862 INFO L93 Difference]: Finished difference Result 237 states and 260 transitions. [2020-11-28 07:37:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-28 07:37:54,863 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 115 [2020-11-28 07:37:54,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:54,866 INFO L225 Difference]: With dead ends: 237 [2020-11-28 07:37:54,866 INFO L226 Difference]: Without dead ends: 236 [2020-11-28 07:37:54,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 292 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1142, Invalid=1614, Unknown=0, NotChecked=0, Total=2756 [2020-11-28 07:37:54,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-11-28 07:37:54,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2020-11-28 07:37:54,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-11-28 07:37:54,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2020-11-28 07:37:54,914 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 115 [2020-11-28 07:37:54,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:54,915 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2020-11-28 07:37:54,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-11-28 07:37:54,915 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2020-11-28 07:37:54,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-11-28 07:37:54,923 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:54,923 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1] [2020-11-28 07:37:55,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:55,126 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:37:55,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:55,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1923709923, now seen corresponding path program 5 times [2020-11-28 07:37:55,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:55,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289455703] [2020-11-28 07:37:55,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:57,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289455703] [2020-11-28 07:37:57,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869857538] [2020-11-28 07:37:57,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:57,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-28 07:37:57,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:37:57,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 07:37:57,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 737 proven. 21 refuted. 0 times theorem prover too weak. 4601 trivial. 0 not checked. [2020-11-28 07:37:57,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 737 proven. 21 refuted. 0 times theorem prover too weak. 4601 trivial. 0 not checked. [2020-11-28 07:37:58,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1380521470] [2020-11-28 07:37:58,260 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:37:58,260 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:37:58,261 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:37:58,261 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:37:58,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:37:58,379 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:37:58,742 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-11-28 07:38:01,828 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:38:01,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:38:01,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 8, 8] total 62 [2020-11-28 07:38:01,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38503797] [2020-11-28 07:38:01,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-11-28 07:38:01,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:01,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-11-28 07:38:01,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1557, Invalid=2999, Unknown=0, NotChecked=0, Total=4556 [2020-11-28 07:38:01,833 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 63 states. [2020-11-28 07:38:10,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:10,894 INFO L93 Difference]: Finished difference Result 243 states and 244 transitions. [2020-11-28 07:38:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2020-11-28 07:38:10,894 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 235 [2020-11-28 07:38:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:10,896 INFO L225 Difference]: With dead ends: 243 [2020-11-28 07:38:10,896 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:38:10,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 637 SyntacticMatches, 47 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16599 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=12643, Invalid=32089, Unknown=0, NotChecked=0, Total=44732 [2020-11-28 07:38:10,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:38:10,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:38:10,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:38:10,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:38:10,912 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 235 [2020-11-28 07:38:10,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:10,912 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:38:10,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-11-28 07:38:10,912 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:38:10,912 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:38:11,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-11-28 07:38:11,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:38:11,235 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 207 [2020-11-28 07:38:11,552 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 24 [2020-11-28 07:38:11,554 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 19) no Hoare annotation was computed. [2020-11-28 07:38:11,554 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:38:11,554 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-11-28 07:38:11,554 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-11-28 07:38:11,554 INFO L274 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-11-28 07:38:11,554 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 19) no Hoare annotation was computed. [2020-11-28 07:38:11,554 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-11-28 07:38:11,554 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:38:11,554 INFO L274 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-11-28 07:38:11,554 INFO L274 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-11-28 07:38:11,555 INFO L270 CegarLoopResult]: At program point L18-2(lines 18 21) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~y~0 (+ (div (+ (* ULTIMATE.start_main_~x~0 (- 1)) 2147483648) 2) 1)) (<= 2 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 2147483646)) (and (<= 1 ULTIMATE.start_main_~y~0) (<= 0 (+ ULTIMATE.start_main_~x~0 2147483648)) (<= ULTIMATE.start_main_~y~0 1) (<= (+ ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0) 2147483648))) [2020-11-28 07:38:11,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:38:11 BoogieIcfgContainer [2020-11-28 07:38:11,569 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:38:11,570 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:38:11,570 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:38:11,570 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:38:11,571 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:37:44" (3/4) ... [2020-11-28 07:38:11,573 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:38:11,582 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-28 07:38:11,582 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-28 07:38:11,582 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:38:11,612 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_43cdf4de-1206-4c94-807b-9a933e75f6c0/bin/utaipan/witness.graphml [2020-11-28 07:38:11,612 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:38:11,613 INFO L168 Benchmark]: Toolchain (without parser) took 27598.10 ms. Allocated memory was 100.7 MB in the beginning and 302.0 MB in the end (delta: 201.3 MB). Free memory was 74.8 MB in the beginning and 209.8 MB in the end (delta: -135.0 MB). Peak memory consumption was 67.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:11,614 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 100.7 MB. Free memory was 59.9 MB in the beginning and 59.9 MB in the end (delta: 56.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:11,614 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.46 ms. Allocated memory was 100.7 MB in the beginning and 144.7 MB in the end (delta: 44.0 MB). Free memory was 74.6 MB in the beginning and 122.7 MB in the end (delta: -48.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:11,614 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.43 ms. Allocated memory is still 144.7 MB. Free memory was 122.7 MB in the beginning and 121.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:11,615 INFO L168 Benchmark]: Boogie Preprocessor took 33.90 ms. Allocated memory is still 144.7 MB. Free memory was 121.2 MB in the beginning and 120.5 MB in the end (delta: 735.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:11,615 INFO L168 Benchmark]: RCFGBuilder took 392.44 ms. Allocated memory is still 144.7 MB. Free memory was 120.5 MB in the beginning and 110.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:11,616 INFO L168 Benchmark]: TraceAbstraction took 26826.20 ms. Allocated memory was 144.7 MB in the beginning and 302.0 MB in the end (delta: 157.3 MB). Free memory was 110.1 MB in the beginning and 211.8 MB in the end (delta: -101.8 MB). Peak memory consumption was 174.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:11,616 INFO L168 Benchmark]: Witness Printer took 42.32 ms. Allocated memory is still 302.0 MB. Free memory was 211.8 MB in the beginning and 209.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:11,619 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 100.7 MB. Free memory was 59.9 MB in the beginning and 59.9 MB in the end (delta: 56.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 231.46 ms. Allocated memory was 100.7 MB in the beginning and 144.7 MB in the end (delta: 44.0 MB). Free memory was 74.6 MB in the beginning and 122.7 MB in the end (delta: -48.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.43 ms. Allocated memory is still 144.7 MB. Free memory was 122.7 MB in the beginning and 121.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.90 ms. Allocated memory is still 144.7 MB. Free memory was 121.2 MB in the beginning and 120.5 MB in the end (delta: 735.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 392.44 ms. Allocated memory is still 144.7 MB. Free memory was 120.5 MB in the beginning and 110.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 26826.20 ms. Allocated memory was 144.7 MB in the beginning and 302.0 MB in the end (delta: 157.3 MB). Free memory was 110.1 MB in the beginning and 211.8 MB in the end (delta: -101.8 MB). Peak memory consumption was 174.9 MB. Max. memory is 16.1 GB. * Witness Printer took 42.32 ms. Allocated memory is still 302.0 MB. Free memory was 211.8 MB in the beginning and 209.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 19]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 19]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: ((y <= (x * -1 + 2147483648) / 2 + 1 && 2 <= y) && y <= 2147483646) || (((1 <= y && 0 <= x + 2147483648) && y <= 1) && x + y <= 2147483648) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 26.2s, OverallIterations: 10, TraceHistogramMax: 47, AutomataDifference: 10.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 381 SDslu, 83 SDs, 0 SdLazy, 699 SolverSat, 219 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1596 GetRequests, 1164 SyntacticMatches, 91 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19286 ImplicationChecksByTransitivity, 19.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=236occurred 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: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 49 NumberOfFragments, 36 HoareAnnotationTreeSize, 1 FomulaSimplifications, 810 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 1 FomulaSimplificationsInter, 1782 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 927 NumberOfCodeBlocks, 717 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1360 ConstructedInterpolants, 0 QuantifiedInterpolants, 455092 SizeOfPredicates, 6 NumberOfNonLiveVariables, 478 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 24 InterpolantComputations, 4 PerfectInterpolantSequences, 10678/20766 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: OVERALL_TIME[ms]: 441, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 8, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 24, TOOLS_POST_TIME[ms]: 47, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 24, TOOLS_QUANTIFIERELIM_TIME[ms]: 31, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 9, FLUID_QUERY_TIME[ms]: 5, FLUID_QUERIES: 39, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME[ms]: 79, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 191, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 29, DOMAIN_ISBOTTOM_APPLICATIONS: 8, DOMAIN_ISBOTTOM_TIME[ms]: 32, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 257, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 256, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 6, REGEX_TO_DAG_TIME[ms]: 4, DAG_COMPRESSION_TIME[ms]: 11, DAG_COMPRESSION_PROCESSED_NODES: 75, DAG_COMPRESSION_RETAINED_NODES: 27, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...