./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/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 f4078ef7bc39da0337b6d8ed5ecbbcec336a37b8 ................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/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 f4078ef7bc39da0337b6d8ed5ecbbcec336a37b8 ............................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:43:49,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:43:49,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:43:49,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:43:49,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:43:49,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:43:49,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:43:49,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:43:49,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:43:49,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:43:49,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:43:49,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:43:49,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:43:49,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:43:49,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:43:49,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:43:49,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:43:49,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:43:49,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:43:49,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:43:49,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:43:49,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:43:49,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:43:49,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:43:49,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:43:49,788 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:43:49,789 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:43:49,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:43:49,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:43:49,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:43:49,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:43:49,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:43:49,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:43:49,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:43:49,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:43:49,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:43:49,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:43:49,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:43:49,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:43:49,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:43:49,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:43:49,800 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:43:49,828 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:43:49,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:43:49,829 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:43:49,830 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:43:49,830 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:43:49,830 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:43:49,830 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:43:49,830 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:43:49,831 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:43:49,831 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:43:49,831 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:43:49,831 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:43:49,831 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:43:49,832 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:43:49,832 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:43:49,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:43:49,833 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:43:49,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:43:49,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:43:49,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:43:49,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:43:49,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:43:49,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:43:49,834 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:43:49,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:43:49,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:43:49,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:43:49,835 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:43:49,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:43:49,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:43:49,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:43:49,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:43:49,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:43:49,837 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:43:49,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:43:49,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:43:49,837 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:43:49,837 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_a4ebb34a-a6f4-4860-88ef-ff1979a25130/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 -> f4078ef7bc39da0337b6d8ed5ecbbcec336a37b8 [2019-11-26 02:43:50,001 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:43:50,015 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:43:50,018 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:43:50,019 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:43:50,020 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:43:50,020 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2019-11-26 02:43:50,077 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/data/e093a82a2/7a232629f927400db4a1ded188b239d4/FLAGa396a4f0c [2019-11-26 02:43:50,455 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:43:50,455 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2019-11-26 02:43:50,462 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/data/e093a82a2/7a232629f927400db4a1ded188b239d4/FLAGa396a4f0c [2019-11-26 02:43:50,795 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/data/e093a82a2/7a232629f927400db4a1ded188b239d4 [2019-11-26 02:43:50,798 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:43:50,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:43:50,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:43:50,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:43:50,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:43:50,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:43:50" (1/1) ... [2019-11-26 02:43:50,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6953b945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:50, skipping insertion in model container [2019-11-26 02:43:50,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:43:50" (1/1) ... [2019-11-26 02:43:50,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:43:50,833 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:43:51,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:43:51,046 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:43:51,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:43:51,146 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:43:51,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:51 WrapperNode [2019-11-26 02:43:51,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:43:51,147 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:43:51,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:43:51,148 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:43:51,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:51" (1/1) ... [2019-11-26 02:43:51,166 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:51" (1/1) ... [2019-11-26 02:43:51,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:43:51,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:43:51,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:43:51,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:43:51,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:51" (1/1) ... [2019-11-26 02:43:51,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:51" (1/1) ... [2019-11-26 02:43:51,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:51" (1/1) ... [2019-11-26 02:43:51,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:51" (1/1) ... [2019-11-26 02:43:51,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:51" (1/1) ... [2019-11-26 02:43:51,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:51" (1/1) ... [2019-11-26 02:43:51,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:51" (1/1) ... [2019-11-26 02:43:51,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:43:51,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:43:51,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:43:51,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:43:51,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/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 [2019-11-26 02:43:51,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:43:51,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:43:51,254 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-26 02:43:51,255 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-26 02:43:51,422 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:43:51,422 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:43:51,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:43:51 BoogieIcfgContainer [2019-11-26 02:43:51,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:43:51,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:43:51,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:43:51,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:43:51,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:43:50" (1/3) ... [2019-11-26 02:43:51,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9dfa5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:43:51, skipping insertion in model container [2019-11-26 02:43:51,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:51" (2/3) ... [2019-11-26 02:43:51,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9dfa5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:43:51, skipping insertion in model container [2019-11-26 02:43:51,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:43:51" (3/3) ... [2019-11-26 02:43:51,431 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2019-11-26 02:43:51,440 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:43:51,463 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:43:51,474 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:43:51,497 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:43:51,498 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:43:51,498 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:43:51,498 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:43:51,498 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:43:51,498 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:43:51,498 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:43:51,499 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:43:51,515 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-11-26 02:43:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:43:51,520 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:43:51,521 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:43:51,522 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:43:51,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:43:51,528 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-26 02:43:51,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:43:51,537 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763239598] [2019-11-26 02:43:51,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:43:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:43:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:51,707 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763239598] [2019-11-26 02:43:51,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:43:51,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-26 02:43:51,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072289062] [2019-11-26 02:43:51,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:43:51,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:43:51,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:43:51,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:43:51,727 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 5 states. [2019-11-26 02:43:51,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:43:51,816 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-11-26 02:43:51,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:43:51,818 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-26 02:43:51,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:43:51,827 INFO L225 Difference]: With dead ends: 22 [2019-11-26 02:43:51,828 INFO L226 Difference]: Without dead ends: 14 [2019-11-26 02:43:51,831 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:43:51,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-26 02:43:51,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-26 02:43:51,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-26 02:43:51,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-26 02:43:51,864 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-26 02:43:51,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:43:51,865 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-26 02:43:51,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:43:51,865 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-26 02:43:51,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-26 02:43:51,866 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:43:51,866 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:43:51,867 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:43:51,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:43:51,867 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-26 02:43:51,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:43:51,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949280653] [2019-11-26 02:43:51,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:43:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:43:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:43:51,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949280653] [2019-11-26 02:43:51,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650130704] [2019-11-26 02:43:51,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/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 [2019-11-26 02:43:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:43:51,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:43:51,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:43:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:43:52,022 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:43:52,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:43:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:43:52,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1106935968] [2019-11-26 02:43:52,332 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-26 02:43:52,333 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:43:52,339 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: IllegalArgumentException [2019-11-26 02:43:52,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:43:52,543 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-26 02:43:52,548 INFO L168 Benchmark]: Toolchain (without parser) took 1747.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 944.7 MB in the beginning and 1.0 GB in the end (delta: -102.4 MB). Peak memory consumption was 26.6 MB. Max. memory is 11.5 GB. [2019-11-26 02:43:52,548 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:43:52,549 INFO L168 Benchmark]: CACSL2BoogieTranslator took 347.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -187.0 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:43:52,550 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:43:52,550 INFO L168 Benchmark]: Boogie Preprocessor took 17.69 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:43:52,551 INFO L168 Benchmark]: RCFGBuilder took 222.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:43:52,552 INFO L168 Benchmark]: TraceAbstraction took 1120.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 58.2 MB). Peak memory consumption was 58.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:43:52,559 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 347.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -187.0 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.69 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 222.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1120.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 58.2 MB). Peak memory consumption was 58.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalArgumentException: Recursive programs are not supported. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: Recursive programs are not supported.: de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 02:43:54,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:43:54,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:43:54,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:43:54,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:43:54,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:43:54,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:43:54,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:43:54,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:43:54,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:43:54,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:43:54,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:43:54,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:43:54,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:43:54,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:43:54,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:43:54,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:43:54,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:43:54,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:43:54,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:43:54,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:43:54,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:43:54,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:43:54,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:43:54,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:43:54,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:43:54,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:43:54,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:43:54,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:43:54,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:43:54,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:43:54,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:43:54,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:43:54,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:43:54,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:43:54,613 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:43:54,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:43:54,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:43:54,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:43:54,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:43:54,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:43:54,617 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-11-26 02:43:54,631 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:43:54,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:43:54,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:43:54,632 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:43:54,632 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:43:54,633 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:43:54,633 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:43:54,633 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:43:54,633 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:43:54,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:43:54,634 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:43:54,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:43:54,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:43:54,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:43:54,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:43:54,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:43:54,636 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:43:54,636 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:43:54,636 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:43:54,637 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:43:54,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:43:54,637 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:43:54,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:43:54,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:43:54,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:43:54,638 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:43:54,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:43:54,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:43:54,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:43:54,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:43:54,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:43:54,640 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:43:54,640 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:43:54,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:43:54,640 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:43:54,641 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_a4ebb34a-a6f4-4860-88ef-ff1979a25130/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 -> f4078ef7bc39da0337b6d8ed5ecbbcec336a37b8 [2019-11-26 02:43:55,003 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:43:55,013 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:43:55,016 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:43:55,021 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:43:55,022 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:43:55,023 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2019-11-26 02:43:55,085 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/data/faf65a065/f8a4e100600049e092da575cc6c61bbd/FLAGe26ddf9cf [2019-11-26 02:43:55,472 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:43:55,473 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2019-11-26 02:43:55,479 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/data/faf65a065/f8a4e100600049e092da575cc6c61bbd/FLAGe26ddf9cf [2019-11-26 02:43:55,496 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/data/faf65a065/f8a4e100600049e092da575cc6c61bbd [2019-11-26 02:43:55,499 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:43:55,501 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:43:55,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:43:55,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:43:55,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:43:55,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:43:55" (1/1) ... [2019-11-26 02:43:55,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a33dc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:55, skipping insertion in model container [2019-11-26 02:43:55,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:43:55" (1/1) ... [2019-11-26 02:43:55,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:43:55,540 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:43:55,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:43:55,691 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:43:55,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:43:55,717 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:43:55,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:55 WrapperNode [2019-11-26 02:43:55,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:43:55,719 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:43:55,719 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:43:55,719 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:43:55,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:55" (1/1) ... [2019-11-26 02:43:55,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:55" (1/1) ... [2019-11-26 02:43:55,748 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:43:55,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:43:55,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:43:55,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:43:55,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:55" (1/1) ... [2019-11-26 02:43:55,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:55" (1/1) ... [2019-11-26 02:43:55,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:55" (1/1) ... [2019-11-26 02:43:55,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:55" (1/1) ... [2019-11-26 02:43:55,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:55" (1/1) ... [2019-11-26 02:43:55,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:55" (1/1) ... [2019-11-26 02:43:55,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:55" (1/1) ... [2019-11-26 02:43:55,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:43:55,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:43:55,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:43:55,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:43:55,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/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 [2019-11-26 02:43:55,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:43:55,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:43:55,895 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-26 02:43:55,897 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-26 02:43:56,089 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:43:56,089 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:43:56,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:43:56 BoogieIcfgContainer [2019-11-26 02:43:56,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:43:56,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:43:56,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:43:56,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:43:56,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:43:55" (1/3) ... [2019-11-26 02:43:56,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db7e7fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:43:56, skipping insertion in model container [2019-11-26 02:43:56,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:55" (2/3) ... [2019-11-26 02:43:56,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db7e7fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:43:56, skipping insertion in model container [2019-11-26 02:43:56,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:43:56" (3/3) ... [2019-11-26 02:43:56,098 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2019-11-26 02:43:56,108 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:43:56,114 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:43:56,125 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:43:56,148 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:43:56,149 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:43:56,149 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:43:56,149 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:43:56,149 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:43:56,149 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:43:56,150 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:43:56,150 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:43:56,167 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-26 02:43:56,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:43:56,172 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:43:56,173 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:43:56,174 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:43:56,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:43:56,180 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-26 02:43:56,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:43:56,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [366591108] [2019-11-26 02:43:56,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:43:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:43:56,281 WARN L253 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:43:56,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:43:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:56,568 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:43:56,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:56,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [366591108] [2019-11-26 02:43:56,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:43:56,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 10 [2019-11-26 02:43:56,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155948643] [2019-11-26 02:43:56,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-26 02:43:56,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:43:56,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-26 02:43:56,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:43:56,973 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 10 states. [2019-11-26 02:43:57,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:43:57,198 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-26 02:43:57,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:43:57,201 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-11-26 02:43:57,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:43:57,216 INFO L225 Difference]: With dead ends: 24 [2019-11-26 02:43:57,217 INFO L226 Difference]: Without dead ends: 14 [2019-11-26 02:43:57,222 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-26 02:43:57,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-26 02:43:57,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-26 02:43:57,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-26 02:43:57,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-26 02:43:57,269 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-26 02:43:57,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:43:57,269 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-26 02:43:57,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-26 02:43:57,270 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-26 02:43:57,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-26 02:43:57,271 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:43:57,271 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:43:57,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:43:57,474 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:43:57,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:43:57,475 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-26 02:43:57,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:43:57,476 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1517344681] [2019-11-26 02:43:57,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:43:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:43:57,510 WARN L253 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-26 02:43:57,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:43:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:43:57,705 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:43:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:43:58,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1517344681] [2019-11-26 02:43:58,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:43:58,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 11 [2019-11-26 02:43:58,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535860827] [2019-11-26 02:43:58,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-26 02:43:58,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:43:58,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-26 02:43:58,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-26 02:43:58,622 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 11 states. [2019-11-26 02:43:58,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:43:58,848 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2019-11-26 02:43:58,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:43:58,849 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2019-11-26 02:43:58,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:43:58,849 INFO L225 Difference]: With dead ends: 14 [2019-11-26 02:43:58,849 INFO L226 Difference]: Without dead ends: 0 [2019-11-26 02:43:58,850 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-11-26 02:43:58,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-26 02:43:58,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-26 02:43:58,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-26 02:43:58,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-26 02:43:58,852 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2019-11-26 02:43:58,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:43:58,852 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-26 02:43:58,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-26 02:43:58,852 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-26 02:43:58,852 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-26 02:43:59,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:43:59,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-26 02:43:59,118 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-26 02:43:59,119 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-26 02:43:59,119 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-26 02:43:59,119 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2019-11-26 02:43:59,119 INFO L444 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2019-11-26 02:43:59,120 INFO L444 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2019-11-26 02:43:59,120 INFO L440 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (= (_ bv20 32) ULTIMATE.start_main_~a~0) (= (_ bv0 32) ULTIMATE.start_main_~b~0)) [2019-11-26 02:43:59,120 INFO L444 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2019-11-26 02:43:59,121 INFO L444 ceAbstractionStarter]: For program point L11(lines 11 18) no Hoare annotation was computed. [2019-11-26 02:43:59,121 INFO L444 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2019-11-26 02:43:59,121 INFO L440 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (= |sum_#in~m| sum_~m) (= |sum_#in~n| sum_~n)) [2019-11-26 02:43:59,121 INFO L444 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2019-11-26 02:43:59,121 INFO L444 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2019-11-26 02:43:59,122 INFO L444 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2019-11-26 02:43:59,122 INFO L447 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2019-11-26 02:43:59,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:43:59 BoogieIcfgContainer [2019-11-26 02:43:59,126 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:43:59,126 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:43:59,126 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:43:59,127 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:43:59,127 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:43:56" (3/4) ... [2019-11-26 02:43:59,131 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-26 02:43:59,139 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2019-11-26 02:43:59,143 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-26 02:43:59,144 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-26 02:43:59,204 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a4ebb34a-a6f4-4860-88ef-ff1979a25130/bin/utaipan/witness.graphml [2019-11-26 02:43:59,205 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:43:59,206 INFO L168 Benchmark]: Toolchain (without parser) took 3705.32 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 961.8 MB in the beginning and 968.1 MB in the end (delta: -6.3 MB). Peak memory consumption was 114.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:43:59,207 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:43:59,207 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.08 ms. Allocated memory is still 1.0 GB. Free memory was 961.8 MB in the beginning and 951.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:43:59,208 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.35 ms. Allocated memory is still 1.0 GB. Free memory is still 951.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:43:59,208 INFO L168 Benchmark]: Boogie Preprocessor took 80.13 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 951.1 MB in the beginning and 1.1 GB in the end (delta: -165.6 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:43:59,210 INFO L168 Benchmark]: RCFGBuilder took 262.07 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: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:43:59,210 INFO L168 Benchmark]: TraceAbstraction took 3034.29 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 968.1 MB in the end (delta: 127.8 MB). Peak memory consumption was 127.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:43:59,210 INFO L168 Benchmark]: Witness Printer took 78.41 ms. Allocated memory is still 1.1 GB. Free memory is still 968.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:43:59,219 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 213.08 ms. Allocated memory is still 1.0 GB. Free memory was 961.8 MB in the beginning and 951.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.35 ms. Allocated memory is still 1.0 GB. Free memory is still 951.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 80.13 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 951.1 MB in the beginning and 1.1 GB in the end (delta: -165.6 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 262.07 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: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3034.29 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 968.1 MB in the end (delta: 127.8 MB). Peak memory consumption was 127.8 MB. Max. memory is 11.5 GB. * Witness Printer took 78.41 ms. Allocated memory is still 1.1 GB. Free memory is still 968.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: SAFE, OverallTime: 2.9s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 25 SDslu, 45 SDs, 0 SdLazy, 104 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 15 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 3258 SizeOfPredicates, 12 NumberOfNonLiveVariables, 44 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 8/8 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...