./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/nested_1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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_b541d231-a038-4616-85ee-2486f549517b/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_b541d231-a038-4616-85ee-2486f549517b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b541d231-a038-4616-85ee-2486f549517b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b541d231-a038-4616-85ee-2486f549517b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/nested_1-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b541d231-a038-4616-85ee-2486f549517b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b541d231-a038-4616-85ee-2486f549517b/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8ec34260dbdf702968911eb4443c2b37192d60c9 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 10:56:39,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 10:56:39,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 10:56:39,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 10:56:39,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 10:56:39,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 10:56:39,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 10:56:39,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 10:56:39,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 10:56:39,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 10:56:39,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 10:56:39,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 10:56:40,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 10:56:40,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 10:56:40,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 10:56:40,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 10:56:40,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 10:56:40,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 10:56:40,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 10:56:40,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 10:56:40,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 10:56:40,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 10:56:40,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 10:56:40,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 10:56:40,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 10:56:40,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 10:56:40,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 10:56:40,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 10:56:40,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 10:56:40,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 10:56:40,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 10:56:40,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 10:56:40,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 10:56:40,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 10:56:40,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 10:56:40,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 10:56:40,018 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 10:56:40,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 10:56:40,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 10:56:40,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 10:56:40,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 10:56:40,020 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b541d231-a038-4616-85ee-2486f549517b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 10:56:40,033 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 10:56:40,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 10:56:40,034 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 10:56:40,034 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 10:56:40,034 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 10:56:40,034 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 10:56:40,034 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 10:56:40,034 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 10:56:40,035 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 10:56:40,035 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 10:56:40,035 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 10:56:40,035 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 10:56:40,035 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 10:56:40,035 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 10:56:40,036 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 10:56:40,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 10:56:40,036 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 10:56:40,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 10:56:40,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 10:56:40,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 10:56:40,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 10:56:40,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 10:56:40,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 10:56:40,037 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 10:56:40,037 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 10:56:40,037 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 10:56:40,037 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 10:56:40,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 10:56:40,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 10:56:40,038 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 10:56:40,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 10:56:40,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 10:56:40,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 10:56:40,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 10:56:40,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 10:56:40,039 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 10:56:40,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 10:56:40,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 10:56:40,039 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 10:56:40,039 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 10:56:40,039 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_b541d231-a038-4616-85ee-2486f549517b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ec34260dbdf702968911eb4443c2b37192d60c9 [2019-12-07 10:56:40,146 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 10:56:40,154 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 10:56:40,156 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 10:56:40,157 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 10:56:40,157 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 10:56:40,158 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b541d231-a038-4616-85ee-2486f549517b/bin/utaipan/../../sv-benchmarks/c/loop-acceleration/nested_1-1.c [2019-12-07 10:56:40,195 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b541d231-a038-4616-85ee-2486f549517b/bin/utaipan/data/270db51bb/07f468b96fdd4d9b948b78025da89d18/FLAG43b64edb9 [2019-12-07 10:56:40,639 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 10:56:40,640 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b541d231-a038-4616-85ee-2486f549517b/sv-benchmarks/c/loop-acceleration/nested_1-1.c [2019-12-07 10:56:40,643 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b541d231-a038-4616-85ee-2486f549517b/bin/utaipan/data/270db51bb/07f468b96fdd4d9b948b78025da89d18/FLAG43b64edb9 [2019-12-07 10:56:40,651 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b541d231-a038-4616-85ee-2486f549517b/bin/utaipan/data/270db51bb/07f468b96fdd4d9b948b78025da89d18 [2019-12-07 10:56:40,653 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 10:56:40,654 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 10:56:40,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 10:56:40,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 10:56:40,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 10:56:40,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:56:40" (1/1) ... [2019-12-07 10:56:40,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@119a7e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:56:40, skipping insertion in model container [2019-12-07 10:56:40,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:56:40" (1/1) ... [2019-12-07 10:56:40,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 10:56:40,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 10:56:40,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 10:56:40,773 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 10:56:40,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 10:56:40,823 INFO L208 MainTranslator]: Completed translation [2019-12-07 10:56:40,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:56:40 WrapperNode [2019-12-07 10:56:40,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 10:56:40,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 10:56:40,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 10:56:40,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 10:56:40,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:56:40" (1/1) ... [2019-12-07 10:56:40,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:56:40" (1/1) ... [2019-12-07 10:56:40,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 10:56:40,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 10:56:40,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 10:56:40,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 10:56:40,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:56:40" (1/1) ... [2019-12-07 10:56:40,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:56:40" (1/1) ... [2019-12-07 10:56:40,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:56:40" (1/1) ... [2019-12-07 10:56:40,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:56:40" (1/1) ... [2019-12-07 10:56:40,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:56:40" (1/1) ... [2019-12-07 10:56:40,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:56:40" (1/1) ... [2019-12-07 10:56:40,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:56:40" (1/1) ... [2019-12-07 10:56:40,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 10:56:40,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 10:56:40,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 10:56:40,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 10:56:40,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:56:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b541d231-a038-4616-85ee-2486f549517b/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 10:56:40,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 10:56:40,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 10:56:41,019 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 10:56:41,019 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-07 10:56:41,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:56:41 BoogieIcfgContainer [2019-12-07 10:56:41,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 10:56:41,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 10:56:41,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 10:56:41,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 10:56:41,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 10:56:40" (1/3) ... [2019-12-07 10:56:41,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c96f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:56:41, skipping insertion in model container [2019-12-07 10:56:41,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:56:40" (2/3) ... [2019-12-07 10:56:41,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c96f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:56:41, skipping insertion in model container [2019-12-07 10:56:41,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:56:41" (3/3) ... [2019-12-07 10:56:41,025 INFO L109 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2019-12-07 10:56:41,031 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 10:56:41,035 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 10:56:41,042 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 10:56:41,056 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 10:56:41,056 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 10:56:41,056 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 10:56:41,056 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 10:56:41,056 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 10:56:41,057 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 10:56:41,057 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 10:56:41,057 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 10:56:41,065 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2019-12-07 10:56:41,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 10:56:41,069 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:56:41,069 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 10:56:41,069 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:56:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:56:41,073 INFO L82 PathProgramCache]: Analyzing trace with hash 997519, now seen corresponding path program 1 times [2019-12-07 10:56:41,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 10:56:41,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936891821] [2019-12-07 10:56:41,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:56:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:56:41,194 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 10:56:41,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936891821] [2019-12-07 10:56:41,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:56:41,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 10:56:41,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928474345] [2019-12-07 10:56:41,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 10:56:41,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 10:56:41,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 10:56:41,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 10:56:41,209 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2019-12-07 10:56:41,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:56:41,229 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2019-12-07 10:56:41,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 10:56:41,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-12-07 10:56:41,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:56:41,236 INFO L225 Difference]: With dead ends: 15 [2019-12-07 10:56:41,237 INFO L226 Difference]: Without dead ends: 8 [2019-12-07 10:56:41,238 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 10:56:41,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-12-07 10:56:41,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2019-12-07 10:56:41,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-12-07 10:56:41,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2019-12-07 10:56:41,259 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 4 [2019-12-07 10:56:41,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:56:41,259 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-12-07 10:56:41,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 10:56:41,260 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2019-12-07 10:56:41,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 10:56:41,260 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:56:41,260 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 10:56:41,260 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:56:41,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:56:41,260 INFO L82 PathProgramCache]: Analyzing trace with hash 926693262, now seen corresponding path program 1 times [2019-12-07 10:56:41,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 10:56:41,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400748331] [2019-12-07 10:56:41,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:56:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:56:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:56:41,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400748331] [2019-12-07 10:56:41,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:56:41,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 10:56:41,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417310702] [2019-12-07 10:56:41,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 10:56:41,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 10:56:41,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 10:56:41,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 10:56:41,299 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 3 states. [2019-12-07 10:56:41,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:56:41,307 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2019-12-07 10:56:41,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 10:56:41,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-12-07 10:56:41,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:56:41,308 INFO L225 Difference]: With dead ends: 13 [2019-12-07 10:56:41,308 INFO L226 Difference]: Without dead ends: 8 [2019-12-07 10:56:41,308 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 10:56:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-12-07 10:56:41,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-12-07 10:56:41,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-12-07 10:56:41,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-12-07 10:56:41,310 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2019-12-07 10:56:41,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:56:41,311 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-12-07 10:56:41,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 10:56:41,311 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-12-07 10:56:41,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 10:56:41,311 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:56:41,311 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:56:41,311 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:56:41,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:56:41,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1359489651, now seen corresponding path program 1 times [2019-12-07 10:56:41,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 10:56:41,312 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702684150] [2019-12-07 10:56:41,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:56:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:56:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:56:41,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702684150] [2019-12-07 10:56:41,357 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880217122] [2019-12-07 10:56:41,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b541d231-a038-4616-85ee-2486f549517b/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 10:56:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:56:41,380 INFO L264 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 10:56:41,383 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:56:41,410 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 10:56:41,410 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 10:56:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 10:56:41,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1402911613] [2019-12-07 10:56:41,451 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-12-07 10:56:41,451 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 10:56:41,456 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 10:56:41,462 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 10:56:41,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 10:56:41,618 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 10:56:41,684 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 10:56:41,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 10:56:41,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2019-12-07 10:56:41,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269589394] [2019-12-07 10:56:41,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 10:56:41,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 10:56:41,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 10:56:41,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-12-07 10:56:41,686 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 9 states. [2019-12-07 10:56:41,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:56:41,831 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2019-12-07 10:56:41,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 10:56:41,832 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 7 [2019-12-07 10:56:41,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:56:41,832 INFO L225 Difference]: With dead ends: 27 [2019-12-07 10:56:41,832 INFO L226 Difference]: Without dead ends: 21 [2019-12-07 10:56:41,833 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2019-12-07 10:56:41,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-12-07 10:56:41,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-12-07 10:56:41,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-12-07 10:56:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-12-07 10:56:41,837 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 7 [2019-12-07 10:56:41,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:56:41,838 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-12-07 10:56:41,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 10:56:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-12-07 10:56:41,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-07 10:56:41,839 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:56:41,839 INFO L410 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1] [2019-12-07 10:56:42,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:56:42,040 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:56:42,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:56:42,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1363019531, now seen corresponding path program 2 times [2019-12-07 10:56:42,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 10:56:42,040 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130690698] [2019-12-07 10:56:42,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:56:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:56:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-12-07 10:56:42,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130690698] [2019-12-07 10:56:42,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875091419] [2019-12-07 10:56:42,096 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b541d231-a038-4616-85ee-2486f549517b/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 10:56:42,123 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 10:56:42,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 10:56:42,123 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 10:56:42,125 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:56:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-12-07 10:56:42,140 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 10:56:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-12-07 10:56:42,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [456529351] [2019-12-07 10:56:42,165 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-12-07 10:56:42,165 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 10:56:42,165 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 10:56:42,165 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 10:56:42,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 10:56:42,246 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 10:56:42,300 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 10:56:42,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 10:56:42,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2019-12-07 10:56:42,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193269195] [2019-12-07 10:56:42,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 10:56:42,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 10:56:42,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 10:56:42,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-12-07 10:56:42,302 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2019-12-07 10:56:42,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:56:42,382 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2019-12-07 10:56:42,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 10:56:42,382 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-12-07 10:56:42,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:56:42,382 INFO L225 Difference]: With dead ends: 53 [2019-12-07 10:56:42,383 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 10:56:42,383 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-07 10:56:42,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 10:56:42,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-12-07 10:56:42,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-12-07 10:56:42,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-12-07 10:56:42,388 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 20 [2019-12-07 10:56:42,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:56:42,389 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-12-07 10:56:42,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 10:56:42,389 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-12-07 10:56:42,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-07 10:56:42,391 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:56:42,391 INFO L410 BasicCegarLoop]: trace histogram [24, 4, 4, 1, 1, 1, 1] [2019-12-07 10:56:42,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:56:42,592 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:56:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:56:42,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1587558667, now seen corresponding path program 3 times [2019-12-07 10:56:42,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 10:56:42,594 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793699039] [2019-12-07 10:56:42,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:56:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:56:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-12-07 10:56:42,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793699039] [2019-12-07 10:56:42,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603416285] [2019-12-07 10:56:42,729 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b541d231-a038-4616-85ee-2486f549517b/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 10:56:42,768 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 10:56:42,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 10:56:42,769 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 10:56:42,772 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:56:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-12-07 10:56:42,882 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 10:56:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 10 proven. 314 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-12-07 10:56:43,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [794594878] [2019-12-07 10:56:43,148 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-12-07 10:56:43,148 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 10:56:43,149 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 10:56:43,149 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 10:56:43,149 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 10:56:43,207 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 10:56:43,325 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 10:56:43,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 10:56:43,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 29 [2019-12-07 10:56:43,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557797823] [2019-12-07 10:56:43,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-07 10:56:43,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 10:56:43,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-07 10:56:43,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2019-12-07 10:56:43,327 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 29 states. [2019-12-07 10:56:47,447 WARN L192 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2019-12-07 10:56:50,021 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2019-12-07 10:56:54,413 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 13 [2019-12-07 10:57:00,579 WARN L192 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2019-12-07 10:57:08,428 WARN L192 SmtUtils]: Spent 3.95 s on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2019-12-07 10:57:14,331 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 14 [2019-12-07 10:57:32,536 WARN L192 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2019-12-07 10:57:55,646 WARN L192 SmtUtils]: Spent 6.29 s on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-12-07 10:58:05,983 WARN L192 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2019-12-07 10:58:12,901 WARN L192 SmtUtils]: Spent 4.86 s on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2019-12-07 10:58:25,171 WARN L192 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2019-12-07 10:58:31,010 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< (mod (+ c_ULTIMATE.start_main_~x~0 4) 4294967296) 268435455))) (and (or (<= 10 (mod c_ULTIMATE.start_main_~y~0 4294967296)) .cse0) (< (mod (+ c_ULTIMATE.start_main_~x~0 1) 4294967296) 268435455) (or .cse0 (<= 10 (mod (+ c_ULTIMATE.start_main_~y~0 2) 4294967296))) (< (mod c_ULTIMATE.start_main_~x~0 4294967296) 268435455) (or (<= 10 (mod (+ c_ULTIMATE.start_main_~y~0 1) 4294967296)) .cse0) (or (<= 10 (mod (+ c_ULTIMATE.start_main_~y~0 4) 4294967296)) .cse0) (or (<= 10 (mod (+ c_ULTIMATE.start_main_~y~0 3) 4294967296)) .cse0) (< (mod (+ c_ULTIMATE.start_main_~x~0 3) 4294967296) 268435455) (< (mod (+ c_ULTIMATE.start_main_~x~0 2) 4294967296) 268435455))) is different from false [2019-12-07 10:58:40,884 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2019-12-07 10:59:08,896 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2019-12-07 10:59:13,793 WARN L192 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2019-12-07 10:59:17,668 WARN L192 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2019-12-07 10:59:39,276 WARN L192 SmtUtils]: Spent 5.49 s on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2019-12-07 10:59:48,256 WARN L192 SmtUtils]: Spent 2.92 s on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2019-12-07 11:00:03,362 WARN L192 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 26 [2019-12-07 11:00:16,781 WARN L192 SmtUtils]: Spent 4.33 s on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2019-12-07 11:00:26,178 WARN L192 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2019-12-07 11:00:28,944 WARN L192 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2019-12-07 11:00:53,060 WARN L192 SmtUtils]: Spent 3.13 s on a formula simplification. DAG size of input: 34 DAG size of output: 19 [2019-12-07 11:00:55,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:00:55,269 INFO L93 Difference]: Finished difference Result 137 states and 180 transitions. [2019-12-07 11:00:55,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-12-07 11:00:55,269 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2019-12-07 11:00:55,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:00:55,272 INFO L225 Difference]: With dead ends: 137 [2019-12-07 11:00:55,272 INFO L226 Difference]: Without dead ends: 109 [2019-12-07 11:00:55,277 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5441 ImplicationChecksByTransitivity, 227.9s TimeCoverageRelationStatistics Valid=2707, Invalid=11291, Unknown=48, NotChecked=234, Total=14280 [2019-12-07 11:00:55,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-07 11:00:55,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2019-12-07 11:00:55,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-12-07 11:00:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2019-12-07 11:00:55,291 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 36 [2019-12-07 11:00:55,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:00:55,291 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2019-12-07 11:00:55,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-07 11:00:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2019-12-07 11:00:55,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-12-07 11:00:55,294 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:00:55,294 INFO L410 BasicCegarLoop]: trace histogram [70, 10, 10, 1, 1, 1, 1] [2019-12-07 11:00:55,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:00:55,495 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:00:55,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:00:55,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1774725455, now seen corresponding path program 4 times [2019-12-07 11:00:55,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:00:55,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576669888] [2019-12-07 11:00:55,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:00:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:00:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 586 proven. 28 refuted. 0 times theorem prover too weak. 2601 trivial. 0 not checked. [2019-12-07 11:00:55,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576669888] [2019-12-07 11:00:55,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370646737] [2019-12-07 11:00:55,651 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b541d231-a038-4616-85ee-2486f549517b/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 11:00:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:00:55,708 INFO L264 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 11:00:55,711 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:00:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 586 proven. 28 refuted. 0 times theorem prover too weak. 2601 trivial. 0 not checked. [2019-12-07 11:00:55,732 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:00:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 586 proven. 28 refuted. 0 times theorem prover too weak. 2601 trivial. 0 not checked. [2019-12-07 11:00:55,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1442624393] [2019-12-07 11:00:55,844 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-12-07 11:00:55,844 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:00:55,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:00:55,844 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:00:55,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:00:55,911 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:00:56,006 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:00:56,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:00:56,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2019-12-07 11:00:56,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474189229] [2019-12-07 11:00:56,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 11:00:56,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:00:56,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 11:00:56,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2019-12-07 11:00:56,007 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand 19 states. [2019-12-07 11:00:56,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:00:56,097 INFO L93 Difference]: Finished difference Result 222 states and 283 transitions. [2019-12-07 11:00:56,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 11:00:56,098 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 94 [2019-12-07 11:00:56,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:00:56,099 INFO L225 Difference]: With dead ends: 222 [2019-12-07 11:00:56,099 INFO L226 Difference]: Without dead ends: 125 [2019-12-07 11:00:56,100 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2019-12-07 11:00:56,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-12-07 11:00:56,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2019-12-07 11:00:56,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-07 11:00:56,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2019-12-07 11:00:56,115 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 94 [2019-12-07 11:00:56,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:00:56,115 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2019-12-07 11:00:56,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 11:00:56,116 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2019-12-07 11:00:56,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-12-07 11:00:56,118 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:00:56,118 INFO L410 BasicCegarLoop]: trace histogram [100, 10, 10, 1, 1, 1, 1] [2019-12-07 11:00:56,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:00:56,319 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:00:56,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:00:56,319 INFO L82 PathProgramCache]: Analyzing trace with hash 426529733, now seen corresponding path program 5 times [2019-12-07 11:00:56,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:00:56,320 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440644850] [2019-12-07 11:00:56,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:00:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:00:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2019-12-07 11:00:56,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440644850] [2019-12-07 11:00:56,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373782322] [2019-12-07 11:00:56,563 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b541d231-a038-4616-85ee-2486f549517b/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 11:00:56,762 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2019-12-07 11:00:56,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:00:56,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 11:00:56,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:01:09,814 WARN L192 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 19 [2019-12-07 11:01:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 1099 proven. 0 refuted. 0 times theorem prover too weak. 4951 trivial. 0 not checked. [2019-12-07 11:01:11,838 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:01:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 1099 proven. 0 refuted. 0 times theorem prover too weak. 4951 trivial. 0 not checked. [2019-12-07 11:01:12,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-12-07 11:01:12,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [12] total 19 [2019-12-07 11:01:12,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062165823] [2019-12-07 11:01:12,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 11:01:12,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:01:12,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 11:01:12,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=249, Unknown=2, NotChecked=0, Total=342 [2019-12-07 11:01:12,074 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand 8 states. [2019-12-07 11:01:14,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:01:14,121 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2019-12-07 11:01:14,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 11:01:14,130 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 124 [2019-12-07 11:01:14,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:01:14,130 INFO L225 Difference]: With dead ends: 125 [2019-12-07 11:01:14,130 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 11:01:14,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=106, Invalid=272, Unknown=2, NotChecked=0, Total=380 [2019-12-07 11:01:14,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 11:01:14,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 11:01:14,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 11:01:14,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 11:01:14,132 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 124 [2019-12-07 11:01:14,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:01:14,132 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 11:01:14,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 11:01:14,132 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 11:01:14,132 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 11:01:14,333 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:01:14,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 11:01:16,938 WARN L192 SmtUtils]: Spent 2.56 s on a formula simplification. DAG size of input: 89 DAG size of output: 42 [2019-12-07 11:01:18,555 WARN L192 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 46 DAG size of output: 23 [2019-12-07 11:01:18,559 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 11:01:18,560 INFO L242 CegarLoopResult]: At program point L17-2(lines 17 19) the Hoare annotation is: (let ((.cse2 (mod ULTIMATE.start_main_~y~0 4294967296)) (.cse0 (< (mod (+ ULTIMATE.start_main_~x~0 4294967295) 4294967296) 268435455)) (.cse1 (< (mod ULTIMATE.start_main_~x~0 4294967296) 268435455))) (or (and .cse0 (< (mod (+ ULTIMATE.start_main_~x~0 4) 4294967296) 268435455)) (and (<= 10 (mod (+ ULTIMATE.start_main_~y~0 4) 4294967296)) .cse0 .cse1 (<= 10 .cse2)) (= ULTIMATE.start_main_~x~0 0) (and .cse0 .cse1 (<= 10 (mod (+ ULTIMATE.start_main_~y~0 2) 4294967296)) (< .cse2 10)) (and .cse0 .cse1 (<= 7 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 7)) (and .cse0 .cse1 (< 0 (+ (div ULTIMATE.start_main_~y~0 4294967296) 1)) (<= ULTIMATE.start_main_~y~0 6)))) [2019-12-07 11:01:18,560 INFO L246 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2019-12-07 11:01:18,560 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 11:01:18,560 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-12-07 11:01:18,560 INFO L242 CegarLoopResult]: At program point L14-2(lines 14 22) the Hoare annotation is: (let ((.cse0 (< (mod (+ ULTIMATE.start_main_~x~0 4294967295) 4294967296) 268435455))) (or (and .cse0 (< (mod (+ ULTIMATE.start_main_~x~0 2) 4294967296) 268435455)) (and (<= ULTIMATE.start_main_~x~0 0) (= ULTIMATE.start_main_~y~0 0) (<= 0 ULTIMATE.start_main_~x~0)) (and .cse0 (<= 10 (mod ULTIMATE.start_main_~y~0 4294967296))))) [2019-12-07 11:01:18,560 INFO L246 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-12-07 11:01:18,560 INFO L249 CegarLoopResult]: At program point L4-2(lines 1 25) the Hoare annotation is: true [2019-12-07 11:01:18,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 11:01:18 BoogieIcfgContainer [2019-12-07 11:01:18,573 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 11:01:18,573 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 11:01:18,573 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 11:01:18,573 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 11:01:18,573 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:56:41" (3/4) ... [2019-12-07 11:01:18,576 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 11:01:18,581 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2019-12-07 11:01:18,581 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 11:01:18,608 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b541d231-a038-4616-85ee-2486f549517b/bin/utaipan/witness.graphml [2019-12-07 11:01:18,608 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 11:01:18,609 INFO L168 Benchmark]: Toolchain (without parser) took 277955.00 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.2 MB). Free memory was 943.5 MB in the beginning and 927.6 MB in the end (delta: 15.9 MB). Peak memory consumption was 128.1 MB. Max. memory is 11.5 GB. [2019-12-07 11:01:18,609 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:01:18,609 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.87 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.8 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -156.7 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-12-07 11:01:18,610 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.10 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:01:18,610 INFO L168 Benchmark]: Boogie Preprocessor took 14.46 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-12-07 11:01:18,610 INFO L168 Benchmark]: RCFGBuilder took 161.10 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: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 11:01:18,610 INFO L168 Benchmark]: TraceAbstraction took 277551.31 ms. Allocated memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 9.4 MB). Free memory was 1.1 GB in the beginning and 929.6 MB in the end (delta: 151.4 MB). Peak memory consumption was 160.9 MB. Max. memory is 11.5 GB. [2019-12-07 11:01:18,611 INFO L168 Benchmark]: Witness Printer took 35.25 ms. Allocated memory is still 1.1 GB. Free memory was 929.6 MB in the beginning and 927.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 11.5 GB. [2019-12-07 11:01:18,612 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 168.87 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.8 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -156.7 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.10 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.46 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 161.10 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: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 277551.31 ms. Allocated memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 9.4 MB). Free memory was 1.1 GB in the beginning and 929.6 MB in the end (delta: 151.4 MB). Peak memory consumption was 160.9 MB. Max. memory is 11.5 GB. * Witness Printer took 35.25 ms. Allocated memory is still 1.1 GB. Free memory was 929.6 MB in the beginning and 927.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((((((x + 4294967295) % 4294967296 < 268435455 && (x + 4) % 4294967296 < 268435455) || (((10 <= (y + 4) % 4294967296 && (x + 4294967295) % 4294967296 < 268435455) && x % 4294967296 < 268435455) && 10 <= y % 4294967296)) || x == 0) || ((((x + 4294967295) % 4294967296 < 268435455 && x % 4294967296 < 268435455) && 10 <= (y + 2) % 4294967296) && y % 4294967296 < 10)) || ((((x + 4294967295) % 4294967296 < 268435455 && x % 4294967296 < 268435455) && 7 <= y) && y <= 7)) || ((((x + 4294967295) % 4294967296 < 268435455 && x % 4294967296 < 268435455) && 0 < y / 4294967296 + 1) && y <= 6) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (((x + 4294967295) % 4294967296 < 268435455 && (x + 2) % 4294967296 < 268435455) || ((x <= 0 && y == 0) && 0 <= x)) || ((x + 4294967295) % 4294967296 < 268435455 && 10 <= y % 4294967296) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 1 error locations. Result: SAFE, OverallTime: 273.2s, OverallIterations: 7, TraceHistogramMax: 100, AutomataDifference: 254.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.2s, HoareTripleCheckerStatistics: 35 SDtfs, 39 SDslu, 92 SDs, 0 SdLazy, 714 SolverSat, 274 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 25.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 856 GetRequests, 664 SyntacticMatches, 3 SemanticMatches, 189 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5628 ImplicationChecksByTransitivity, 241.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=125occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 125 NumberOfFragments, 151 HoareAnnotationTreeSize, 3 FomulaSimplifications, 3353 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 462 FormulaSimplificationTreeSizeReductionInter, 4.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 16.3s InterpolantComputationTime, 572 NumberOfCodeBlocks, 468 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 836 ConstructedInterpolants, 1 QuantifiedInterpolants, 225435 SizeOfPredicates, 9 NumberOfNonLiveVariables, 541 ConjunctsInSsa, 65 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 22938/29194 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...