./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/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 0455ba49274114922cfe1b7739d9cb0a89e6c868 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 11:44:41,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 11:44:41,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 11:44:41,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 11:44:41,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 11:44:41,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 11:44:41,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 11:44:41,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 11:44:41,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 11:44:41,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 11:44:41,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 11:44:41,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 11:44:41,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 11:44:41,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 11:44:41,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 11:44:41,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 11:44:41,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 11:44:41,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 11:44:41,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 11:44:41,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 11:44:41,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 11:44:41,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 11:44:41,050 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 11:44:41,051 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 11:44:41,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 11:44:41,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 11:44:41,053 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 11:44:41,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 11:44:41,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 11:44:41,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 11:44:41,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 11:44:41,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 11:44:41,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 11:44:41,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 11:44:41,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 11:44:41,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 11:44:41,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 11:44:41,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 11:44:41,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 11:44:41,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 11:44:41,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 11:44:41,058 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2019-12-07 11:44:41,068 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 11:44:41,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 11:44:41,069 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 11:44:41,069 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 11:44:41,069 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 11:44:41,069 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 11:44:41,069 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 11:44:41,070 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 11:44:41,070 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 11:44:41,070 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 11:44:41,070 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 11:44:41,070 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 11:44:41,070 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 11:44:41,070 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 11:44:41,070 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 11:44:41,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 11:44:41,071 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 11:44:41,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 11:44:41,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 11:44:41,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 11:44:41,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 11:44:41,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 11:44:41,072 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-12-07 11:44:41,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 11:44:41,072 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 11:44:41,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 11:44:41,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 11:44:41,072 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 11:44:41,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 11:44:41,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 11:44:41,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 11:44:41,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 11:44:41,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 11:44:41,073 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 11:44:41,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 11:44:41,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 11:44:41,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 11:44:41,074 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 11:44:41,074 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_c555c830-51fa-43f2-be86-57f4f6e908ad/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 -> 0455ba49274114922cfe1b7739d9cb0a89e6c868 [2019-12-07 11:44:41,172 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 11:44:41,180 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 11:44:41,182 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 11:44:41,183 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 11:44:41,183 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 11:44:41,184 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a.c [2019-12-07 11:44:41,222 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/bin/utaipan/data/9b3a7a2e6/f6a774be4ec44769bf960b1eea8c2e47/FLAG88ecafae7 [2019-12-07 11:44:41,537 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 11:44:41,538 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a.c [2019-12-07 11:44:41,541 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/bin/utaipan/data/9b3a7a2e6/f6a774be4ec44769bf960b1eea8c2e47/FLAG88ecafae7 [2019-12-07 11:44:41,550 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/bin/utaipan/data/9b3a7a2e6/f6a774be4ec44769bf960b1eea8c2e47 [2019-12-07 11:44:41,552 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 11:44:41,553 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 11:44:41,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 11:44:41,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 11:44:41,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 11:44:41,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:44:41" (1/1) ... [2019-12-07 11:44:41,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@737456d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:44:41, skipping insertion in model container [2019-12-07 11:44:41,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:44:41" (1/1) ... [2019-12-07 11:44:41,563 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 11:44:41,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 11:44:41,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:44:41,671 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 11:44:41,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:44:41,729 INFO L208 MainTranslator]: Completed translation [2019-12-07 11:44:41,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:44:41 WrapperNode [2019-12-07 11:44:41,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 11:44:41,730 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 11:44:41,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 11:44:41,730 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 11:44:41,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:44:41" (1/1) ... [2019-12-07 11:44:41,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:44:41" (1/1) ... [2019-12-07 11:44:41,750 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 11:44:41,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 11:44:41,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 11:44:41,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 11:44:41,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:44:41" (1/1) ... [2019-12-07 11:44:41,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:44:41" (1/1) ... [2019-12-07 11:44:41,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:44:41" (1/1) ... [2019-12-07 11:44:41,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:44:41" (1/1) ... [2019-12-07 11:44:41,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:44:41" (1/1) ... [2019-12-07 11:44:41,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:44:41" (1/1) ... [2019-12-07 11:44:41,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:44:41" (1/1) ... [2019-12-07 11:44:41,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 11:44:41,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 11:44:41,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 11:44:41,762 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 11:44:41,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:44:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/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 [2019-12-07 11:44:41,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 11:44:41,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 11:44:41,918 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 11:44:41,918 INFO L287 CfgBuilder]: Removed 5 assume(true) statements. [2019-12-07 11:44:41,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:44:41 BoogieIcfgContainer [2019-12-07 11:44:41,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 11:44:41,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 11:44:41,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 11:44:41,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 11:44:41,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 11:44:41" (1/3) ... [2019-12-07 11:44:41,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@457a5e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:44:41, skipping insertion in model container [2019-12-07 11:44:41,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:44:41" (2/3) ... [2019-12-07 11:44:41,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@457a5e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:44:41, skipping insertion in model container [2019-12-07 11:44:41,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:44:41" (3/3) ... [2019-12-07 11:44:41,923 INFO L109 eAbstractionObserver]: Analyzing ICFG GopanReps-CAV2006-Fig1a.c [2019-12-07 11:44:41,930 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 11:44:41,934 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-12-07 11:44:41,941 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-12-07 11:44:41,956 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 11:44:41,956 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 11:44:41,956 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 11:44:41,956 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 11:44:41,956 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 11:44:41,956 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 11:44:41,956 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 11:44:41,956 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 11:44:41,966 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-12-07 11:44:41,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 11:44:41,969 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:44:41,969 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 11:44:41,970 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:44:41,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:44:41,973 INFO L82 PathProgramCache]: Analyzing trace with hash 963531, now seen corresponding path program 1 times [2019-12-07 11:44:41,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:44:41,979 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416315691] [2019-12-07 11:44:41,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:44:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:44:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:42,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416315691] [2019-12-07 11:44:42,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:44:42,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 11:44:42,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548316542] [2019-12-07 11:44:42,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 11:44:42,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:44:42,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 11:44:42,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:44:42,073 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2019-12-07 11:44:42,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:44:42,101 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2019-12-07 11:44:42,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 11:44:42,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-12-07 11:44:42,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:44:42,109 INFO L225 Difference]: With dead ends: 40 [2019-12-07 11:44:42,109 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 11:44:42,111 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:44:42,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 11:44:42,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-12-07 11:44:42,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 11:44:42,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-12-07 11:44:42,134 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2019-12-07 11:44:42,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:44:42,134 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-12-07 11:44:42,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 11:44:42,134 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-12-07 11:44:42,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 11:44:42,134 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:44:42,134 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 11:44:42,135 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:44:42,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:44:42,135 INFO L82 PathProgramCache]: Analyzing trace with hash 963339, now seen corresponding path program 1 times [2019-12-07 11:44:42,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:44:42,135 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347981496] [2019-12-07 11:44:42,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:44:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:44:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:42,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347981496] [2019-12-07 11:44:42,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:44:42,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 11:44:42,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292823149] [2019-12-07 11:44:42,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 11:44:42,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:44:42,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 11:44:42,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:44:42,149 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2019-12-07 11:44:42,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:44:42,167 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-12-07 11:44:42,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 11:44:42,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-12-07 11:44:42,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:44:42,168 INFO L225 Difference]: With dead ends: 21 [2019-12-07 11:44:42,168 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 11:44:42,169 INFO L630 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 [2019-12-07 11:44:42,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 11:44:42,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-12-07 11:44:42,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 11:44:42,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-12-07 11:44:42,172 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 4 [2019-12-07 11:44:42,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:44:42,172 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-12-07 11:44:42,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 11:44:42,172 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-12-07 11:44:42,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 11:44:42,173 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:44:42,173 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 11:44:42,173 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:44:42,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:44:42,173 INFO L82 PathProgramCache]: Analyzing trace with hash 29863556, now seen corresponding path program 1 times [2019-12-07 11:44:42,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:44:42,174 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696609098] [2019-12-07 11:44:42,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:44:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:44:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:42,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696609098] [2019-12-07 11:44:42,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:44:42,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 11:44:42,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920132527] [2019-12-07 11:44:42,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 11:44:42,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:44:42,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 11:44:42,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:44:42,187 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 3 states. [2019-12-07 11:44:42,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:44:42,202 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2019-12-07 11:44:42,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 11:44:42,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-07 11:44:42,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:44:42,203 INFO L225 Difference]: With dead ends: 25 [2019-12-07 11:44:42,203 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 11:44:42,203 INFO L630 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 [2019-12-07 11:44:42,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 11:44:42,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2019-12-07 11:44:42,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-12-07 11:44:42,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-12-07 11:44:42,206 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 5 [2019-12-07 11:44:42,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:44:42,206 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-12-07 11:44:42,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 11:44:42,206 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-12-07 11:44:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 11:44:42,206 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:44:42,207 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:44:42,207 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:44:42,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:44:42,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1365891962, now seen corresponding path program 1 times [2019-12-07 11:44:42,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:44:42,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815824128] [2019-12-07 11:44:42,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:44:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:44:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:42,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815824128] [2019-12-07 11:44:42,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:44:42,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 11:44:42,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836758754] [2019-12-07 11:44:42,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 11:44:42,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:44:42,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 11:44:42,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:44:42,224 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 3 states. [2019-12-07 11:44:42,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:44:42,232 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2019-12-07 11:44:42,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 11:44:42,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-12-07 11:44:42,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:44:42,233 INFO L225 Difference]: With dead ends: 18 [2019-12-07 11:44:42,233 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 11:44:42,234 INFO L630 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 [2019-12-07 11:44:42,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 11:44:42,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-12-07 11:44:42,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 11:44:42,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-12-07 11:44:42,237 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 7 [2019-12-07 11:44:42,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:44:42,237 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-12-07 11:44:42,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 11:44:42,237 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-12-07 11:44:42,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 11:44:42,237 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:44:42,237 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:44:42,238 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:44:42,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:44:42,238 INFO L82 PathProgramCache]: Analyzing trace with hash -767237628, now seen corresponding path program 1 times [2019-12-07 11:44:42,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:44:42,238 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587638387] [2019-12-07 11:44:42,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:44:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:44:42,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:42,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587638387] [2019-12-07 11:44:42,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393915546] [2019-12-07 11:44:42,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/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 [2019-12-07 11:44:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:44:42,280 INFO L264 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 11:44:42,283 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:44:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:42,305 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:44:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:42,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-12-07 11:44:42,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 7 [2019-12-07 11:44:42,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170642749] [2019-12-07 11:44:42,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 11:44:42,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:44:42,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 11:44:42,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 11:44:42,322 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2019-12-07 11:44:42,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:44:42,343 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2019-12-07 11:44:42,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 11:44:42,344 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-12-07 11:44:42,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:44:42,345 INFO L225 Difference]: With dead ends: 26 [2019-12-07 11:44:42,345 INFO L226 Difference]: Without dead ends: 24 [2019-12-07 11:44:42,345 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 11:44:42,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-12-07 11:44:42,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-12-07 11:44:42,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-12-07 11:44:42,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-12-07 11:44:42,350 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 10 [2019-12-07 11:44:42,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:44:42,350 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-12-07 11:44:42,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 11:44:42,350 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-12-07 11:44:42,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 11:44:42,350 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:44:42,351 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 11:44:42,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:44:42,552 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:44:42,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:44:42,554 INFO L82 PathProgramCache]: Analyzing trace with hash -767237820, now seen corresponding path program 1 times [2019-12-07 11:44:42,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:44:42,555 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564553927] [2019-12-07 11:44:42,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:44:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:44:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:42,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564553927] [2019-12-07 11:44:42,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315996789] [2019-12-07 11:44:42,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/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 [2019-12-07 11:44:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:44:42,628 INFO L264 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 11:44:42,629 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:44:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:42,631 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:44:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:42,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [327438439] [2019-12-07 11:44:42,664 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-12-07 11:44:42,664 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:44:42,667 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:44:42,672 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:44:42,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:44:42,793 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:44:42,901 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:44:42,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:44:42,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2019-12-07 11:44:42,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385083048] [2019-12-07 11:44:42,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 11:44:42,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:44:42,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 11:44:42,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-12-07 11:44:42,902 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 6 states. [2019-12-07 11:44:42,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:44:42,932 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2019-12-07 11:44:42,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 11:44:42,932 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-07 11:44:42,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:44:42,933 INFO L225 Difference]: With dead ends: 62 [2019-12-07 11:44:42,933 INFO L226 Difference]: Without dead ends: 61 [2019-12-07 11:44:42,934 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-12-07 11:44:42,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-07 11:44:42,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2019-12-07 11:44:42,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 11:44:42,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2019-12-07 11:44:42,941 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 10 [2019-12-07 11:44:42,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:44:42,941 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2019-12-07 11:44:42,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 11:44:42,941 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2019-12-07 11:44:42,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 11:44:42,942 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:44:42,942 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:44:43,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:44:43,143 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:44:43,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:44:43,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1419016103, now seen corresponding path program 1 times [2019-12-07 11:44:43,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:44:43,143 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079726117] [2019-12-07 11:44:43,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:44:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:44:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:43,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079726117] [2019-12-07 11:44:43,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959788567] [2019-12-07 11:44:43,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/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 [2019-12-07 11:44:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:44:43,176 INFO L264 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 11:44:43,177 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:44:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:43,187 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:44:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:43,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [865390718] [2019-12-07 11:44:43,200 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:44:43,200 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:44:43,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:44:43,201 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:44:43,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:44:43,320 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:44:43,513 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:44:43,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:44:43,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-12-07 11:44:43,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804673975] [2019-12-07 11:44:43,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 11:44:43,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:44:43,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 11:44:43,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2019-12-07 11:44:43,517 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 8 states. [2019-12-07 11:44:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:44:43,549 INFO L93 Difference]: Finished difference Result 113 states and 144 transitions. [2019-12-07 11:44:43,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 11:44:43,549 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-07 11:44:43,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:44:43,551 INFO L225 Difference]: With dead ends: 113 [2019-12-07 11:44:43,551 INFO L226 Difference]: Without dead ends: 72 [2019-12-07 11:44:43,552 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2019-12-07 11:44:43,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-12-07 11:44:43,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-12-07 11:44:43,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-07 11:44:43,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2019-12-07 11:44:43,558 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 12 [2019-12-07 11:44:43,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:44:43,559 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2019-12-07 11:44:43,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 11:44:43,559 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2019-12-07 11:44:43,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-07 11:44:43,560 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:44:43,560 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1] [2019-12-07 11:44:43,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:44:43,761 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:44:43,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:44:43,762 INFO L82 PathProgramCache]: Analyzing trace with hash -89664657, now seen corresponding path program 2 times [2019-12-07 11:44:43,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:44:43,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840995817] [2019-12-07 11:44:43,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:44:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:44:43,906 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:43,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840995817] [2019-12-07 11:44:43,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387697326] [2019-12-07 11:44:43,908 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/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 [2019-12-07 11:44:43,936 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 11:44:43,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:44:43,937 INFO L264 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 11:44:43,938 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:44:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:43,943 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:44:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:43,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1855127615] [2019-12-07 11:44:43,987 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-12-07 11:44:43,987 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:44:43,987 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:44:43,987 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:44:43,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:44:44,033 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:44:44,168 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:44:44,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:44:44,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2019-12-07 11:44:44,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620994437] [2019-12-07 11:44:44,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 11:44:44,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:44:44,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 11:44:44,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-07 11:44:44,169 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 12 states. [2019-12-07 11:44:44,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:44:44,238 INFO L93 Difference]: Finished difference Result 299 states and 348 transitions. [2019-12-07 11:44:44,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 11:44:44,239 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2019-12-07 11:44:44,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:44:44,241 INFO L225 Difference]: With dead ends: 299 [2019-12-07 11:44:44,241 INFO L226 Difference]: Without dead ends: 298 [2019-12-07 11:44:44,242 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-07 11:44:44,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2019-12-07 11:44:44,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 213. [2019-12-07 11:44:44,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-07 11:44:44,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 246 transitions. [2019-12-07 11:44:44,260 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 246 transitions. Word has length 28 [2019-12-07 11:44:44,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:44:44,261 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 246 transitions. [2019-12-07 11:44:44,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 11:44:44,261 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 246 transitions. [2019-12-07 11:44:44,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-07 11:44:44,262 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:44:44,263 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 3, 1, 1] [2019-12-07 11:44:44,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:44:44,464 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:44:44,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:44:44,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1800413774, now seen corresponding path program 2 times [2019-12-07 11:44:44,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:44:44,466 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265608080] [2019-12-07 11:44:44,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:44:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:44:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:44,635 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265608080] [2019-12-07 11:44:44,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537072461] [2019-12-07 11:44:44,636 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/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 [2019-12-07 11:44:44,656 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 11:44:44,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:44:44,657 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 11:44:44,658 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:44:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-07 11:44:44,697 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:44:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-07 11:44:44,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [498332907] [2019-12-07 11:44:44,756 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:44:44,756 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:44:44,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:44:44,756 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:44:44,756 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:44:44,838 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:44:45,061 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:44:45,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:44:45,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2019-12-07 11:44:45,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047689632] [2019-12-07 11:44:45,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 11:44:45,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:44:45,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 11:44:45,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2019-12-07 11:44:45,063 INFO L87 Difference]: Start difference. First operand 213 states and 246 transitions. Second operand 19 states. [2019-12-07 11:44:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:44:45,143 INFO L93 Difference]: Finished difference Result 426 states and 506 transitions. [2019-12-07 11:44:45,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 11:44:45,143 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2019-12-07 11:44:45,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:44:45,144 INFO L225 Difference]: With dead ends: 426 [2019-12-07 11:44:45,144 INFO L226 Difference]: Without dead ends: 228 [2019-12-07 11:44:45,145 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2019-12-07 11:44:45,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2019-12-07 11:44:45,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2019-12-07 11:44:45,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2019-12-07 11:44:45,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 258 transitions. [2019-12-07 11:44:45,154 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 258 transitions. Word has length 42 [2019-12-07 11:44:45,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:44:45,155 INFO L462 AbstractCegarLoop]: Abstraction has 228 states and 258 transitions. [2019-12-07 11:44:45,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 11:44:45,155 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 258 transitions. [2019-12-07 11:44:45,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-12-07 11:44:45,156 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:44:45,156 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1] [2019-12-07 11:44:45,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:44:45,357 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:44:45,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:44:45,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1024665989, now seen corresponding path program 3 times [2019-12-07 11:44:45,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:44:45,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390266598] [2019-12-07 11:44:45,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:44:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:44:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:45,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390266598] [2019-12-07 11:44:45,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192152783] [2019-12-07 11:44:45,438 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/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 [2019-12-07 11:44:45,460 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:44:45,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:44:45,460 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 11:44:45,462 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:44:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:45,470 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:44:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:45,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1130958985] [2019-12-07 11:44:45,607 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-12-07 11:44:45,607 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:44:45,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:44:45,607 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:44:45,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:44:45,632 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:44:45,850 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:44:45,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:44:45,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2019-12-07 11:44:45,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692007287] [2019-12-07 11:44:45,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 11:44:45,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:44:45,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 11:44:45,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2019-12-07 11:44:45,852 INFO L87 Difference]: Start difference. First operand 228 states and 258 transitions. Second operand 24 states. [2019-12-07 11:44:46,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:44:46,001 INFO L93 Difference]: Finished difference Result 1565 states and 1824 transitions. [2019-12-07 11:44:46,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 11:44:46,001 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 64 [2019-12-07 11:44:46,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:44:46,010 INFO L225 Difference]: With dead ends: 1565 [2019-12-07 11:44:46,010 INFO L226 Difference]: Without dead ends: 1564 [2019-12-07 11:44:46,011 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 162 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2019-12-07 11:44:46,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2019-12-07 11:44:46,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 891. [2019-12-07 11:44:46,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 891 states. [2019-12-07 11:44:46,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1032 transitions. [2019-12-07 11:44:46,048 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1032 transitions. Word has length 64 [2019-12-07 11:44:46,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:44:46,048 INFO L462 AbstractCegarLoop]: Abstraction has 891 states and 1032 transitions. [2019-12-07 11:44:46,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 11:44:46,048 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1032 transitions. [2019-12-07 11:44:46,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-12-07 11:44:46,054 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:44:46,054 INFO L410 BasicCegarLoop]: trace histogram [18, 17, 17, 10, 10, 10, 8, 8, 8, 1, 1] [2019-12-07 11:44:46,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:44:46,254 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:44:46,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:44:46,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1132994817, now seen corresponding path program 3 times [2019-12-07 11:44:46,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:44:46,255 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58694660] [2019-12-07 11:44:46,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:44:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:44:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 498 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-12-07 11:44:46,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58694660] [2019-12-07 11:44:46,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053466553] [2019-12-07 11:44:46,437 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/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 [2019-12-07 11:44:46,465 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:44:46,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:44:46,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 11:44:46,468 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:44:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 314 proven. 184 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-12-07 11:44:46,575 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:44:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 314 proven. 184 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-12-07 11:44:46,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1789246400] [2019-12-07 11:44:46,689 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:44:46,689 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:44:46,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:44:46,689 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:44:46,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:44:46,764 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:44:47,144 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:44:47,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:44:47,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 37 [2019-12-07 11:44:47,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051814388] [2019-12-07 11:44:47,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-07 11:44:47,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:44:47,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-07 11:44:47,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=1664, Unknown=0, NotChecked=0, Total=2070 [2019-12-07 11:44:47,146 INFO L87 Difference]: Start difference. First operand 891 states and 1032 transitions. Second operand 38 states. [2019-12-07 11:44:47,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:44:47,510 INFO L93 Difference]: Finished difference Result 1410 states and 1637 transitions. [2019-12-07 11:44:47,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-07 11:44:47,510 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 108 [2019-12-07 11:44:47,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:44:47,512 INFO L225 Difference]: With dead ends: 1410 [2019-12-07 11:44:47,512 INFO L226 Difference]: Without dead ends: 564 [2019-12-07 11:44:47,515 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 304 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=988, Invalid=2918, Unknown=0, NotChecked=0, Total=3906 [2019-12-07 11:44:47,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-12-07 11:44:47,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2019-12-07 11:44:47,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2019-12-07 11:44:47,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 639 transitions. [2019-12-07 11:44:47,528 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 639 transitions. Word has length 108 [2019-12-07 11:44:47,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:44:47,528 INFO L462 AbstractCegarLoop]: Abstraction has 564 states and 639 transitions. [2019-12-07 11:44:47,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-07 11:44:47,528 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 639 transitions. [2019-12-07 11:44:47,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-12-07 11:44:47,529 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:44:47,529 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1] [2019-12-07 11:44:47,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:44:47,730 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:44:47,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:44:47,730 INFO L82 PathProgramCache]: Analyzing trace with hash -511517519, now seen corresponding path program 4 times [2019-12-07 11:44:47,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:44:47,731 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811330895] [2019-12-07 11:44:47,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:44:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:44:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:47,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811330895] [2019-12-07 11:44:47,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464488796] [2019-12-07 11:44:47,980 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:44:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:44:48,017 INFO L264 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 11:44:48,021 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:44:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:48,049 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:44:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:48,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1750577667] [2019-12-07 11:44:48,566 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-12-07 11:44:48,566 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:44:48,567 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:44:48,567 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:44:48,567 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:44:48,590 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:44:49,208 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:44:49,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:44:49,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2019-12-07 11:44:49,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692461256] [2019-12-07 11:44:49,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-12-07 11:44:49,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:44:49,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-12-07 11:44:49,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1147, Invalid=1715, Unknown=0, NotChecked=0, Total=2862 [2019-12-07 11:44:49,212 INFO L87 Difference]: Start difference. First operand 564 states and 639 transitions. Second operand 48 states. [2019-12-07 11:44:49,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:44:49,625 INFO L93 Difference]: Finished difference Result 7240 states and 8443 transitions. [2019-12-07 11:44:49,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-12-07 11:44:49,625 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 136 [2019-12-07 11:44:49,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:44:49,649 INFO L225 Difference]: With dead ends: 7240 [2019-12-07 11:44:49,649 INFO L226 Difference]: Without dead ends: 7239 [2019-12-07 11:44:49,650 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 354 SyntacticMatches, 23 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1147, Invalid=1715, Unknown=0, NotChecked=0, Total=2862 [2019-12-07 11:44:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7239 states. [2019-12-07 11:44:49,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7239 to 2469. [2019-12-07 11:44:49,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2469 states. [2019-12-07 11:44:49,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 2874 transitions. [2019-12-07 11:44:49,745 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 2874 transitions. Word has length 136 [2019-12-07 11:44:49,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:44:49,745 INFO L462 AbstractCegarLoop]: Abstraction has 2469 states and 2874 transitions. [2019-12-07 11:44:49,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-12-07 11:44:49,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 2874 transitions. [2019-12-07 11:44:49,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-12-07 11:44:49,747 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:44:49,747 INFO L410 BasicCegarLoop]: trace histogram [29, 28, 28, 19, 19, 19, 10, 10, 10, 1, 1] [2019-12-07 11:44:49,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:44:49,948 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:44:49,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:44:49,948 INFO L82 PathProgramCache]: Analyzing trace with hash -208471244, now seen corresponding path program 4 times [2019-12-07 11:44:49,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:44:49,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231253095] [2019-12-07 11:44:49,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:44:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:44:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 2028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:50,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231253095] [2019-12-07 11:44:50,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360438017] [2019-12-07 11:44:50,298 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:44:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:44:50,331 INFO L264 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 11:44:50,335 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:44:50,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 721 proven. 1064 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-12-07 11:44:50,365 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:44:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 721 proven. 1064 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-12-07 11:44:50,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1947420027] [2019-12-07 11:44:50,842 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:44:50,842 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:44:50,842 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:44:50,843 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:44:50,843 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:44:50,908 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:44:51,375 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:44:51,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:44:51,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 21, 21] total 50 [2019-12-07 11:44:51,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876562921] [2019-12-07 11:44:51,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-12-07 11:44:51,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:44:51,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-12-07 11:44:51,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1301, Invalid=2121, Unknown=0, NotChecked=0, Total=3422 [2019-12-07 11:44:51,378 INFO L87 Difference]: Start difference. First operand 2469 states and 2874 transitions. Second operand 51 states. [2019-12-07 11:44:51,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:44:51,524 INFO L93 Difference]: Finished difference Result 2717 states and 3162 transitions. [2019-12-07 11:44:51,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-12-07 11:44:51,524 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 174 [2019-12-07 11:44:51,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:44:51,526 INFO L225 Difference]: With dead ends: 2717 [2019-12-07 11:44:51,526 INFO L226 Difference]: Without dead ends: 359 [2019-12-07 11:44:51,528 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 482 SyntacticMatches, 10 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1301, Invalid=2121, Unknown=0, NotChecked=0, Total=3422 [2019-12-07 11:44:51,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2019-12-07 11:44:51,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2019-12-07 11:44:51,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2019-12-07 11:44:51,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 369 transitions. [2019-12-07 11:44:51,537 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 369 transitions. Word has length 174 [2019-12-07 11:44:51,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:44:51,537 INFO L462 AbstractCegarLoop]: Abstraction has 357 states and 369 transitions. [2019-12-07 11:44:51,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-12-07 11:44:51,537 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 369 transitions. [2019-12-07 11:44:51,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2019-12-07 11:44:51,541 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:44:51,541 INFO L410 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 1, 1] [2019-12-07 11:44:51,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:44:51,741 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:44:51,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:44:51,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1920966903, now seen corresponding path program 5 times [2019-12-07 11:44:51,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:44:51,742 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502632216] [2019-12-07 11:44:51,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:44:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:44:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6348 backedges. 0 proven. 6348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:52,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502632216] [2019-12-07 11:44:52,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743259529] [2019-12-07 11:44:52,548 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:44:52,628 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2019-12-07 11:44:52,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:44:52,629 INFO L264 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 48 conjunts are in the unsatisfiable core [2019-12-07 11:44:52,632 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:44:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6348 backedges. 0 proven. 6348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:52,708 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:44:54,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6348 backedges. 0 proven. 6348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:54,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [512101190] [2019-12-07 11:44:54,655 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-12-07 11:44:54,655 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:44:54,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:44:54,655 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:44:54,655 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:44:54,676 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:44:57,219 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:44:57,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:44:57,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 94 [2019-12-07 11:44:57,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612588638] [2019-12-07 11:44:57,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-12-07 11:44:57,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:44:57,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-12-07 11:44:57,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4579, Invalid=5723, Unknown=0, NotChecked=0, Total=10302 [2019-12-07 11:44:57,224 INFO L87 Difference]: Start difference. First operand 357 states and 369 transitions. Second operand 96 states. [2019-12-07 11:44:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:44:57,803 INFO L93 Difference]: Finished difference Result 3114 states and 3595 transitions. [2019-12-07 11:44:57,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-12-07 11:44:57,803 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 280 [2019-12-07 11:44:57,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:44:57,813 INFO L225 Difference]: With dead ends: 3114 [2019-12-07 11:44:57,813 INFO L226 Difference]: Without dead ends: 3113 [2019-12-07 11:44:57,816 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 885 GetRequests, 738 SyntacticMatches, 47 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7509 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4579, Invalid=5723, Unknown=0, NotChecked=0, Total=10302 [2019-12-07 11:44:57,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3113 states. [2019-12-07 11:44:57,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3113 to 3012. [2019-12-07 11:44:57,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3012 states. [2019-12-07 11:44:57,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 3483 transitions. [2019-12-07 11:44:57,859 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 3483 transitions. Word has length 280 [2019-12-07 11:44:57,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:44:57,859 INFO L462 AbstractCegarLoop]: Abstraction has 3012 states and 3483 transitions. [2019-12-07 11:44:57,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-12-07 11:44:57,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 3483 transitions. [2019-12-07 11:44:57,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2019-12-07 11:44:57,863 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:44:57,864 INFO L410 BasicCegarLoop]: trace histogram [59, 58, 58, 49, 49, 49, 10, 10, 10, 1, 1] [2019-12-07 11:44:58,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:44:58,065 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:44:58,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:44:58,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1372877790, now seen corresponding path program 5 times [2019-12-07 11:44:58,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:44:58,066 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872653235] [2019-12-07 11:44:58,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:44:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:44:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9228 backedges. 0 proven. 9228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:44:59,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872653235] [2019-12-07 11:44:59,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699126612] [2019-12-07 11:44:59,309 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:44:59,341 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-12-07 11:44:59,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:44:59,341 INFO L264 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 11:44:59,344 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:44:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9228 backedges. 2084 proven. 280 refuted. 0 times theorem prover too weak. 6864 trivial. 0 not checked. [2019-12-07 11:44:59,472 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:44:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9228 backedges. 2084 proven. 280 refuted. 0 times theorem prover too weak. 6864 trivial. 0 not checked. [2019-12-07 11:44:59,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [445586525] [2019-12-07 11:44:59,951 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:44:59,951 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:44:59,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:44:59,952 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:44:59,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:45:00,015 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:45:00,651 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:45:00,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:45:00,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 12, 12] total 73 [2019-12-07 11:45:00,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726430483] [2019-12-07 11:45:00,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-12-07 11:45:00,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:45:00,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-12-07 11:45:00,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2728, Invalid=3914, Unknown=0, NotChecked=0, Total=6642 [2019-12-07 11:45:00,654 INFO L87 Difference]: Start difference. First operand 3012 states and 3483 transitions. Second operand 74 states. [2019-12-07 11:45:01,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:45:01,109 INFO L93 Difference]: Finished difference Result 8049 states and 9761 transitions. [2019-12-07 11:45:01,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-12-07 11:45:01,109 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 354 [2019-12-07 11:45:01,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:45:01,126 INFO L225 Difference]: With dead ends: 8049 [2019-12-07 11:45:01,126 INFO L226 Difference]: Without dead ends: 5328 [2019-12-07 11:45:01,130 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1119 GetRequests, 1029 SyntacticMatches, 10 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2728, Invalid=3914, Unknown=0, NotChecked=0, Total=6642 [2019-12-07 11:45:01,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2019-12-07 11:45:01,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 5328. [2019-12-07 11:45:01,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5328 states. [2019-12-07 11:45:01,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5328 states to 5328 states and 6177 transitions. [2019-12-07 11:45:01,220 INFO L78 Accepts]: Start accepts. Automaton has 5328 states and 6177 transitions. Word has length 354 [2019-12-07 11:45:01,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:45:01,220 INFO L462 AbstractCegarLoop]: Abstraction has 5328 states and 6177 transitions. [2019-12-07 11:45:01,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-12-07 11:45:01,220 INFO L276 IsEmpty]: Start isEmpty. Operand 5328 states and 6177 transitions. [2019-12-07 11:45:01,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2019-12-07 11:45:01,223 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:45:01,223 INFO L410 BasicCegarLoop]: trace histogram [73, 72, 72, 51, 51, 51, 22, 22, 22, 1, 1] [2019-12-07 11:45:01,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:45:01,425 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:45:01,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:45:01,426 INFO L82 PathProgramCache]: Analyzing trace with hash 955487032, now seen corresponding path program 6 times [2019-12-07 11:45:01,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:45:01,427 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448016895] [2019-12-07 11:45:01,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:45:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:45:03,224 INFO L134 CoverageAnalysis]: Checked inductivity of 13452 backedges. 0 proven. 13452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:45:03,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448016895] [2019-12-07 11:45:03,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407619895] [2019-12-07 11:45:03,224 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:45:03,288 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:45:03,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:45:03,290 INFO L264 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 74 conjunts are in the unsatisfiable core [2019-12-07 11:45:03,293 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:45:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 13452 backedges. 144 proven. 13308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:45:06,124 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:45:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 13452 backedges. 144 proven. 13308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:45:12,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [932045188] [2019-12-07 11:45:12,809 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:45:12,809 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:45:12,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:45:12,810 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:45:12,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:45:12,866 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:45:16,632 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:45:16,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:45:16,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 74, 74] total 197 [2019-12-07 11:45:16,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529903189] [2019-12-07 11:45:16,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 198 states [2019-12-07 11:45:16,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:45:16,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2019-12-07 11:45:16,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19530, Invalid=22700, Unknown=0, NotChecked=0, Total=42230 [2019-12-07 11:45:16,659 INFO L87 Difference]: Start difference. First operand 5328 states and 6177 transitions. Second operand 198 states. [2019-12-07 11:45:23,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:45:23,078 INFO L93 Difference]: Finished difference Result 8545 states and 10465 transitions. [2019-12-07 11:45:23,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2019-12-07 11:45:23,079 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 438 [2019-12-07 11:45:23,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:45:23,105 INFO L225 Difference]: With dead ends: 8545 [2019-12-07 11:45:23,105 INFO L226 Difference]: Without dead ends: 8544 [2019-12-07 11:45:23,107 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1385 GetRequests, 1159 SyntacticMatches, 22 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8110 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=19530, Invalid=22700, Unknown=0, NotChecked=0, Total=42230 [2019-12-07 11:45:23,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8544 states. [2019-12-07 11:45:23,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8544 to 8544. [2019-12-07 11:45:23,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8544 states. [2019-12-07 11:45:23,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8544 states to 8544 states and 9917 transitions. [2019-12-07 11:45:23,232 INFO L78 Accepts]: Start accepts. Automaton has 8544 states and 9917 transitions. Word has length 438 [2019-12-07 11:45:23,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:45:23,233 INFO L462 AbstractCegarLoop]: Abstraction has 8544 states and 9917 transitions. [2019-12-07 11:45:23,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 198 states. [2019-12-07 11:45:23,233 INFO L276 IsEmpty]: Start isEmpty. Operand 8544 states and 9917 transitions. [2019-12-07 11:45:23,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2019-12-07 11:45:23,242 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:45:23,243 INFO L410 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 1, 1] [2019-12-07 11:45:23,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:45:23,444 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:45:23,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:45:23,445 INFO L82 PathProgramCache]: Analyzing trace with hash -507259975, now seen corresponding path program 6 times [2019-12-07 11:45:23,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:45:23,445 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324877437] [2019-12-07 11:45:23,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:45:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:45:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 26508 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 26414 trivial. 0 not checked. [2019-12-07 11:45:23,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324877437] [2019-12-07 11:45:23,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623336817] [2019-12-07 11:45:23,898 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:45:23,987 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:45:23,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:45:23,989 INFO L264 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 53 conjunts are in the unsatisfiable core [2019-12-07 11:45:23,993 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:45:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 26508 backedges. 21047 proven. 0 refuted. 0 times theorem prover too weak. 5461 trivial. 0 not checked. [2019-12-07 11:45:25,081 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:45:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 26508 backedges. 21047 proven. 0 refuted. 0 times theorem prover too weak. 5461 trivial. 0 not checked. [2019-12-07 11:45:26,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-12-07 11:45:26,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53, 53] imperfect sequences [3] total 56 [2019-12-07 11:45:26,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000059497] [2019-12-07 11:45:26,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-12-07 11:45:26,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:45:26,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-12-07 11:45:26,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1438, Invalid=1754, Unknown=0, NotChecked=0, Total=3192 [2019-12-07 11:45:26,146 INFO L87 Difference]: Start difference. First operand 8544 states and 9917 transitions. Second operand 54 states. [2019-12-07 11:45:26,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:45:26,393 INFO L93 Difference]: Finished difference Result 9424 states and 10943 transitions. [2019-12-07 11:45:26,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-12-07 11:45:26,393 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 568 [2019-12-07 11:45:26,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:45:26,397 INFO L225 Difference]: With dead ends: 9424 [2019-12-07 11:45:26,397 INFO L226 Difference]: Without dead ends: 1183 [2019-12-07 11:45:26,402 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1324 GetRequests, 1217 SyntacticMatches, 52 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1438, Invalid=1754, Unknown=0, NotChecked=0, Total=3192 [2019-12-07 11:45:26,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2019-12-07 11:45:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1183. [2019-12-07 11:45:26,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1183 states. [2019-12-07 11:45:26,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1183 transitions. [2019-12-07 11:45:26,414 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1183 transitions. Word has length 568 [2019-12-07 11:45:26,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:45:26,414 INFO L462 AbstractCegarLoop]: Abstraction has 1183 states and 1183 transitions. [2019-12-07 11:45:26,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-12-07 11:45:26,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1183 transitions. [2019-12-07 11:45:26,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1183 [2019-12-07 11:45:26,422 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:45:26,422 INFO L410 BasicCegarLoop]: trace histogram [197, 196, 196, 146, 146, 146, 51, 51, 51, 1, 1] [2019-12-07 11:45:26,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:45:26,623 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:45:26,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:45:26,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1045773420, now seen corresponding path program 7 times [2019-12-07 11:45:26,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:45:26,626 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662493925] [2019-12-07 11:45:26,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:45:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:45:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 100748 backedges. 0 proven. 37673 refuted. 0 times theorem prover too weak. 63075 trivial. 0 not checked. [2019-12-07 11:45:31,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662493925] [2019-12-07 11:45:31,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824290163] [2019-12-07 11:45:31,845 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:45:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:45:31,998 INFO L264 TraceCheckSpWp]: Trace formula consists of 1973 conjuncts, 105 conjunts are in the unsatisfiable core [2019-12-07 11:45:32,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:45:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 100748 backedges. 61754 proven. 12752 refuted. 0 times theorem prover too weak. 26242 trivial. 0 not checked. [2019-12-07 11:45:35,357 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:45:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 100748 backedges. 61754 proven. 12752 refuted. 0 times theorem prover too weak. 26242 trivial. 0 not checked. [2019-12-07 11:45:41,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1792333939] [2019-12-07 11:45:41,190 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:45:41,190 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:45:41,190 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:45:41,190 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:45:41,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:45:41,249 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:46:02,552 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:46:02,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:46:02,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 54, 54] total 158 [2019-12-07 11:46:02,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982841812] [2019-12-07 11:46:02,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 159 states [2019-12-07 11:46:02,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:46:02,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2019-12-07 11:46:02,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6972, Invalid=20750, Unknown=0, NotChecked=0, Total=27722 [2019-12-07 11:46:02,565 INFO L87 Difference]: Start difference. First operand 1183 states and 1183 transitions. Second operand 159 states. [2019-12-07 11:46:56,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:46:56,324 INFO L93 Difference]: Finished difference Result 1183 states and 1183 transitions. [2019-12-07 11:46:56,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 311 states. [2019-12-07 11:46:56,324 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 1182 [2019-12-07 11:46:56,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:46:56,327 INFO L225 Difference]: With dead ends: 1183 [2019-12-07 11:46:56,327 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 11:46:56,340 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4247 GetRequests, 3523 SyntacticMatches, 250 SemanticMatches, 474 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89507 ImplicationChecksByTransitivity, 71.2s TimeCoverageRelationStatistics Valid=50854, Invalid=175246, Unknown=0, NotChecked=0, Total=226100 [2019-12-07 11:46:56,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 11:46:56,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 11:46:56,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 11:46:56,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 11:46:56,341 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1182 [2019-12-07 11:46:56,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:46:56,342 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 11:46:56,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 159 states. [2019-12-07 11:46:56,342 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 11:46:56,343 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 11:46:56,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:46:56,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 11:46:56,716 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 587 DAG size of output: 569 [2019-12-07 11:46:59,023 WARN L192 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 565 DAG size of output: 278 [2019-12-07 11:46:59,026 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2019-12-07 11:46:59,026 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 11:46:59,026 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2019-12-07 11:46:59,026 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 24) no Hoare annotation was computed. [2019-12-07 11:46:59,026 INFO L246 CegarLoopResult]: For program point L19(lines 19 23) no Hoare annotation was computed. [2019-12-07 11:46:59,026 INFO L246 CegarLoopResult]: For program point L19-2(lines 19 23) no Hoare annotation was computed. [2019-12-07 11:46:59,026 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2019-12-07 11:46:59,027 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2019-12-07 11:46:59,027 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 11:46:59,027 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 24) no Hoare annotation was computed. [2019-12-07 11:46:59,027 INFO L246 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2019-12-07 11:46:59,027 INFO L246 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2019-12-07 11:46:59,027 INFO L246 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2019-12-07 11:46:59,027 INFO L246 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2019-12-07 11:46:59,027 INFO L246 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2019-12-07 11:46:59,029 INFO L242 CegarLoopResult]: At program point L18-2(lines 18 25) the Hoare annotation is: (let ((.cse1 (< ULTIMATE.start_main_~x~0 44)) (.cse2 (< ULTIMATE.start_main_~x~0 45)) (.cse4 (<= ULTIMATE.start_main_~x~0 50)) (.cse5 (< ULTIMATE.start_main_~x~0 43)) (.cse6 (<= 51 ULTIMATE.start_main_~x~0)) (.cse3 (< ULTIMATE.start_main_~x~0 49)) (.cse7 (<= ULTIMATE.start_main_~x~0 51)) (.cse0 (+ ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))) (or (and (<= 17 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 17) (<= ULTIMATE.start_main_~y~0 17)) (and (<= ULTIMATE.start_main_~y~0 9) (<= ULTIMATE.start_main_~x~0 9) (<= 9 ULTIMATE.start_main_~x~0)) (and (<= 11 ULTIMATE.start_main_~x~0) (<= .cse0 22) .cse1) (and (<= 42 ULTIMATE.start_main_~x~0) .cse2 (<= ULTIMATE.start_main_~y~0 42)) (and (<= 14 ULTIMATE.start_main_~x~0) (<= .cse0 28) (<= ULTIMATE.start_main_~x~0 14)) (and (<= ULTIMATE.start_main_~x~0 49) (<= 49 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 49)) (and (<= ULTIMATE.start_main_~y~0 44) (<= 44 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 44)) (and (<= 41 ULTIMATE.start_main_~x~0) (<= .cse0 82) .cse1) (and (<= .cse0 0) (<= 0 ULTIMATE.start_main_~x~0) (<= 0 ULTIMATE.start_main_~y~0)) (and (<= 22 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 22) (<= .cse0 44)) (and (<= .cse0 70) (< ULTIMATE.start_main_~x~0 38) (<= 35 ULTIMATE.start_main_~x~0)) (and (<= 39 ULTIMATE.start_main_~x~0) (<= .cse0 78) (< ULTIMATE.start_main_~x~0 42)) (and (<= ULTIMATE.start_main_~y~0 21) (<= 21 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 21)) (and (<= 33 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 33) (< ULTIMATE.start_main_~x~0 36)) (and (<= 26 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 26) (<= .cse0 52)) (and (<= ULTIMATE.start_main_~x~0 4) (<= 4 ULTIMATE.start_main_~x~0) (<= .cse0 8)) (and (<= ULTIMATE.start_main_~x~0 27) (<= .cse0 54) (<= 27 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 8) (<= 8 ULTIMATE.start_main_~x~0) (<= .cse0 16)) (and (<= 37 ULTIMATE.start_main_~x~0) (< ULTIMATE.start_main_~x~0 40) (<= .cse0 74)) (and (<= 28 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 28) (<= ULTIMATE.start_main_~x~0 28)) (and (<= 1 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 1) (<= .cse0 2)) (and (<= ULTIMATE.start_main_~y~0 16) (<= 16 ULTIMATE.start_main_~x~0) .cse3) (and .cse4 (<= 48 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 48)) (and (<= 40 ULTIMATE.start_main_~x~0) (<= .cse0 80) .cse5) (and .cse2 (<= 12 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 12)) (and (<= .cse0 102) (<= ULTIMATE.start_main_~x~0 101) .cse6) (and (<= ULTIMATE.start_main_~x~0 2) (<= .cse0 4) (<= 2 ULTIMATE.start_main_~x~0)) (and (<= 23 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 23) (<= ULTIMATE.start_main_~x~0 23)) (and (<= 43 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 43) (<= ULTIMATE.start_main_~y~0 43)) (and .cse4 (<= 50 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 50)) (and (<= 5 ULTIMATE.start_main_~x~0) (<= .cse0 10) (<= ULTIMATE.start_main_~x~0 5)) (and .cse7 (<= 3 ULTIMATE.start_main_~x~0) (<= .cse0 6)) (and (<= 7 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 7) (<= ULTIMATE.start_main_~y~0 7)) (and (<= 6 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 6) (<= ULTIMATE.start_main_~y~0 6)) (and (<= ULTIMATE.start_main_~x~0 103) .cse6 (<= (+ ULTIMATE.start_main_~y~0 1) 0)) (and (<= 10 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 10) .cse5) (and (<= 47 ULTIMATE.start_main_~x~0) (< ULTIMATE.start_main_~x~0 50) (<= ULTIMATE.start_main_~y~0 47)) (and (<= 18 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 18) (<= .cse0 36)) (and (<= 34 ULTIMATE.start_main_~x~0) (<= .cse0 68) (< ULTIMATE.start_main_~x~0 37)) (and (<= ULTIMATE.start_main_~x~0 20) (<= ULTIMATE.start_main_~y~0 20) (<= 20 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 0) .cse6 (<= ULTIMATE.start_main_~x~0 102)) (and .cse3 (<= .cse0 92) (<= 46 ULTIMATE.start_main_~x~0)) (and (<= 45 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 45) (<= ULTIMATE.start_main_~x~0 45)) (and (< ULTIMATE.start_main_~x~0 41) (<= 38 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 38)) (and (<= 30 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 30) (< ULTIMATE.start_main_~x~0 33)) (and (<= 24 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 24) (<= ULTIMATE.start_main_~x~0 24)) (and (< ULTIMATE.start_main_~x~0 39) (<= 36 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 36)) (and (<= 31 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 31) (<= ULTIMATE.start_main_~x~0 31)) (and (<= .cse0 26) (< ULTIMATE.start_main_~x~0 46) (<= 13 ULTIMATE.start_main_~x~0)) (and .cse7 (<= 25 ULTIMATE.start_main_~x~0) (<= .cse0 50)) (and (<= 29 ULTIMATE.start_main_~x~0) (< ULTIMATE.start_main_~x~0 32) (<= .cse0 58)) (and (< ULTIMATE.start_main_~x~0 48) (<= 15 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 15)) (and (<= 19 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 19) (<= ULTIMATE.start_main_~y~0 19)) (and (<= 32 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 32) (< ULTIMATE.start_main_~x~0 35)))) [2019-12-07 11:46:59,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 11:46:59 BoogieIcfgContainer [2019-12-07 11:46:59,058 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 11:46:59,058 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 11:46:59,058 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 11:46:59,058 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 11:46:59,059 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:44:41" (3/4) ... [2019-12-07 11:46:59,061 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 11:46:59,070 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2019-12-07 11:46:59,070 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-12-07 11:46:59,070 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 11:46:59,105 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c555c830-51fa-43f2-be86-57f4f6e908ad/bin/utaipan/witness.graphml [2019-12-07 11:46:59,105 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 11:46:59,107 INFO L168 Benchmark]: Toolchain (without parser) took 137553.63 ms. Allocated memory was 1.0 GB in the beginning and 1.7 GB in the end (delta: 707.3 MB). Free memory was 940.3 MB in the beginning and 1.6 GB in the end (delta: -693.8 MB). Peak memory consumption was 13.5 MB. Max. memory is 11.5 GB. [2019-12-07 11:46:59,107 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 957.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:46:59,107 INFO L168 Benchmark]: CACSL2BoogieTranslator took 175.97 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.3 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -159.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2019-12-07 11:46:59,108 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.05 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. [2019-12-07 11:46:59,108 INFO L168 Benchmark]: Boogie Preprocessor took 11.68 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 11.5 GB. [2019-12-07 11:46:59,108 INFO L168 Benchmark]: RCFGBuilder took 157.06 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. [2019-12-07 11:46:59,109 INFO L168 Benchmark]: TraceAbstraction took 137138.31 ms. Allocated memory was 1.1 GB in the beginning and 1.7 GB in the end (delta: 604.0 MB). Free memory was 1.1 GB in the beginning and 1.6 GB in the end (delta: -562.7 MB). Peak memory consumption was 948.3 MB. Max. memory is 11.5 GB. [2019-12-07 11:46:59,109 INFO L168 Benchmark]: Witness Printer took 47.46 ms. Allocated memory is still 1.7 GB. Free memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 5.9 MB). Peak memory consumption was 5.9 MB. Max. memory is 11.5 GB. [2019-12-07 11:46:59,111 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 957.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 175.97 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.3 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -159.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.05 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.68 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 11.5 GB. * RCFGBuilder took 157.06 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 137138.31 ms. Allocated memory was 1.1 GB in the beginning and 1.7 GB in the end (delta: 604.0 MB). Free memory was 1.1 GB in the beginning and 1.6 GB in the end (delta: -562.7 MB). Peak memory consumption was 948.3 MB. Max. memory is 11.5 GB. * Witness Printer took 47.46 ms. Allocated memory is still 1.7 GB. Free memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 5.9 MB). Peak memory consumption was 5.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 24]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 24]: 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: 22]: 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 - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((17 <= x && x <= 17) && y <= 17) || ((y <= 9 && x <= 9) && 9 <= x)) || ((11 <= x && x + y <= 22) && x < 44)) || ((42 <= x && x < 45) && y <= 42)) || ((14 <= x && x + y <= 28) && x <= 14)) || ((x <= 49 && 49 <= x) && y <= 49)) || ((y <= 44 && 44 <= x) && x <= 44)) || ((41 <= x && x + y <= 82) && x < 44)) || ((x + y <= 0 && 0 <= x) && 0 <= y)) || ((22 <= x && x <= 22) && x + y <= 44)) || ((x + y <= 70 && x < 38) && 35 <= x)) || ((39 <= x && x + y <= 78) && x < 42)) || ((y <= 21 && 21 <= x) && x <= 21)) || ((33 <= x && y <= 33) && x < 36)) || ((26 <= x && x <= 26) && x + y <= 52)) || ((x <= 4 && 4 <= x) && x + y <= 8)) || ((x <= 27 && x + y <= 54) && 27 <= x)) || ((x <= 8 && 8 <= x) && x + y <= 16)) || ((37 <= x && x < 40) && x + y <= 74)) || ((28 <= x && y <= 28) && x <= 28)) || ((1 <= x && x <= 1) && x + y <= 2)) || ((y <= 16 && 16 <= x) && x < 49)) || ((x <= 50 && 48 <= x) && y <= 48)) || ((40 <= x && x + y <= 80) && x < 43)) || ((x < 45 && 12 <= x) && y <= 12)) || ((x + y <= 102 && x <= 101) && 51 <= x)) || ((x <= 2 && x + y <= 4) && 2 <= x)) || ((23 <= x && y <= 23) && x <= 23)) || ((43 <= x && x <= 43) && y <= 43)) || ((x <= 50 && 50 <= x) && y <= 50)) || ((5 <= x && x + y <= 10) && x <= 5)) || ((x <= 51 && 3 <= x) && x + y <= 6)) || ((7 <= x && x <= 7) && y <= 7)) || ((6 <= x && x <= 6) && y <= 6)) || ((x <= 103 && 51 <= x) && y + 1 <= 0)) || ((10 <= x && y <= 10) && x < 43)) || ((47 <= x && x < 50) && y <= 47)) || ((18 <= x && x <= 18) && x + y <= 36)) || ((34 <= x && x + y <= 68) && x < 37)) || ((x <= 20 && y <= 20) && 20 <= x)) || ((y <= 0 && 51 <= x) && x <= 102)) || ((x < 49 && x + y <= 92) && 46 <= x)) || ((45 <= x && y <= 45) && x <= 45)) || ((x < 41 && 38 <= x) && y <= 38)) || ((30 <= x && y <= 30) && x < 33)) || ((24 <= x && y <= 24) && x <= 24)) || ((x < 39 && 36 <= x) && y <= 36)) || ((31 <= x && y <= 31) && x <= 31)) || ((x + y <= 26 && x < 46) && 13 <= x)) || ((x <= 51 && 25 <= x) && x + y <= 50)) || ((29 <= x && x < 32) && x + y <= 58)) || ((x < 48 && 15 <= x) && y <= 15)) || ((19 <= x && x <= 19) && y <= 19)) || ((32 <= x && y <= 32) && x < 35) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 6 error locations. Result: SAFE, OverallTime: 134.5s, OverallIterations: 18, TraceHistogramMax: 197, AutomataDifference: 63.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.4s, HoareTripleCheckerStatistics: 340 SDtfs, 7483 SDslu, 2920 SDs, 0 SdLazy, 17751 SolverSat, 1414 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10825 GetRequests, 9192 SyntacticMatches, 448 SemanticMatches, 1185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114042 ImplicationChecksByTransitivity, 99.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8544occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 18 MinimizatonAttempts, 5656 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 105 NumberOfFragments, 591 HoareAnnotationTreeSize, 1 FomulaSimplifications, 190 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 1 FomulaSimplificationsInter, 2181 FormulaSimplificationTreeSizeReductionInter, 2.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 33.2s InterpolantComputationTime, 6832 NumberOfCodeBlocks, 6592 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 10192 ConstructedInterpolants, 0 QuantifiedInterpolants, 18891398 SizeOfPredicates, 9 NumberOfNonLiveVariables, 5314 ConjunctsInSsa, 380 ConjunctsInUnsatCore, 46 InterpolantComputations, 8 PerfectInterpolantSequences, 340087/482871 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...