./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_2x3-1.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_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_2x3-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/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 5417ea5971c5cfa3624e07fbe8bf33ef4632cb6f ................................................................................................................................................................................................................................................................................................... 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_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_2x3-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/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 5417ea5971c5cfa3624e07fbe8bf33ef4632cb6f ................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:50:47,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:50:47,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:50:47,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:50:47,589 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:50:47,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:50:47,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:50:47,600 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:50:47,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:50:47,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:50:47,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:50:47,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:50:47,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:50:47,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:50:47,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:50:47,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:50:47,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:50:47,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:50:47,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:50:47,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:50:47,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:50:47,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:50:47,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:50:47,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:50:47,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:50:47,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:50:47,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:50:47,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:50:47,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:50:47,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:50:47,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:50:47,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:50:47,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:50:47,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:50:47,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:50:47,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:50:47,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:50:47,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:50:47,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:50:47,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:50:47,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:50:47,649 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:50:47,662 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:50:47,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:50:47,663 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:50:47,663 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:50:47,663 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:50:47,663 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:50:47,663 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:50:47,664 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:50:47,664 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:50:47,664 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:50:47,664 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:50:47,664 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:50:47,664 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:50:47,665 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:50:47,665 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:50:47,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:50:47,665 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:50:47,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:50:47,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:50:47,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:50:47,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:50:47,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:50:47,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:50:47,667 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:50:47,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:50:47,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:50:47,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:50:47,667 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:50:47,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:50:47,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:50:47,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:50:47,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:50:47,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:50:47,668 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:50:47,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:50:47,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:50:47,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:50:47,669 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_6535d531-b5e9-45e2-b596-b8e10c186ec7/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 -> 5417ea5971c5cfa3624e07fbe8bf33ef4632cb6f [2019-11-26 02:50:47,844 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:50:47,855 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:50:47,858 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:50:47,859 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:50:47,860 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:50:47,860 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/../../sv-benchmarks/c/recursive-simple/sum_2x3-1.c [2019-11-26 02:50:47,920 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/data/c71ddddac/611027f252a9476cbcb381cf97658ac7/FLAGddf1eabf1 [2019-11-26 02:50:48,299 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:50:48,301 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/sv-benchmarks/c/recursive-simple/sum_2x3-1.c [2019-11-26 02:50:48,306 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/data/c71ddddac/611027f252a9476cbcb381cf97658ac7/FLAGddf1eabf1 [2019-11-26 02:50:48,740 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/data/c71ddddac/611027f252a9476cbcb381cf97658ac7 [2019-11-26 02:50:48,742 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:50:48,743 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:50:48,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:50:48,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:50:48,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:50:48,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:50:48" (1/1) ... [2019-11-26 02:50:48,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@486f8fd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:48, skipping insertion in model container [2019-11-26 02:50:48,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:50:48" (1/1) ... [2019-11-26 02:50:48,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:50:48,770 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:50:48,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:50:48,948 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:50:49,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:50:49,035 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:50:49,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:49 WrapperNode [2019-11-26 02:50:49,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:50:49,036 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:50:49,036 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:50:49,036 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:50:49,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:49" (1/1) ... [2019-11-26 02:50:49,049 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:49" (1/1) ... [2019-11-26 02:50:49,065 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:50:49,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:50:49,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:50:49,066 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:50:49,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:49" (1/1) ... [2019-11-26 02:50:49,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:49" (1/1) ... [2019-11-26 02:50:49,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:49" (1/1) ... [2019-11-26 02:50:49,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:49" (1/1) ... [2019-11-26 02:50:49,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:49" (1/1) ... [2019-11-26 02:50:49,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:49" (1/1) ... [2019-11-26 02:50:49,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:49" (1/1) ... [2019-11-26 02:50:49,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:50:49,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:50:49,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:50:49,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:50:49,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/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 02:50:49,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:50:49,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:50:49,129 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-26 02:50:49,129 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-26 02:50:49,281 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:50:49,281 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:50:49,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:50:49 BoogieIcfgContainer [2019-11-26 02:50:49,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:50:49,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:50:49,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:50:49,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:50:49,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:50:48" (1/3) ... [2019-11-26 02:50:49,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81089f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:50:49, skipping insertion in model container [2019-11-26 02:50:49,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:49" (2/3) ... [2019-11-26 02:50:49,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81089f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:50:49, skipping insertion in model container [2019-11-26 02:50:49,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:50:49" (3/3) ... [2019-11-26 02:50:49,290 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_2x3-1.c [2019-11-26 02:50:49,298 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:50:49,304 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:50:49,314 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:50:49,336 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:50:49,336 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:50:49,336 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:50:49,336 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:50:49,337 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:50:49,337 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:50:49,337 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:50:49,337 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:50:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-11-26 02:50:49,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:50:49,364 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:50:49,364 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:50:49,365 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:50:49,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:50:49,373 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-26 02:50:49,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:50:49,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795581656] [2019-11-26 02:50:49,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:50:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:50:49,602 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 02:50:49,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795581656] [2019-11-26 02:50:49,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:50:49,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-26 02:50:49,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541422504] [2019-11-26 02:50:49,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:50:49,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:50:49,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:50:49,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:50:49,619 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 7 states. [2019-11-26 02:50:49,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:50:49,783 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-11-26 02:50:49,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:50:49,785 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-26 02:50:49,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:50:49,794 INFO L225 Difference]: With dead ends: 24 [2019-11-26 02:50:49,795 INFO L226 Difference]: Without dead ends: 14 [2019-11-26 02:50:49,798 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:50:49,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-26 02:50:49,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-26 02:50:49,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-26 02:50:49,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-26 02:50:49,853 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-26 02:50:49,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:50:49,854 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-26 02:50:49,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:50:49,855 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-26 02:50:49,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-26 02:50:49,857 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:50:49,857 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:50:49,858 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:50:49,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:50:49,858 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-26 02:50:49,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:50:49,859 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129718857] [2019-11-26 02:50:49,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:50:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:50:50,005 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 02:50:50,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129718857] [2019-11-26 02:50:50,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049813497] [2019-11-26 02:50:50,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/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 02:50:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:50:50,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:50:50,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:50:50,165 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 02:50:50,166 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:50:50,311 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:50:50,361 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 02:50:50,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [939924103] [2019-11-26 02:50:50,388 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-26 02:50:50,389 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:50:50,396 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: IllegalArgumentException [2019-11-26 02:50:50,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:50:50,601 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 02:50:50,605 INFO L168 Benchmark]: Toolchain (without parser) took 1861.63 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 944.7 MB in the beginning and 1.0 GB in the end (delta: -87.8 MB). Peak memory consumption was 53.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:50,606 INFO L168 Benchmark]: CDTParser took 0.24 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 02:50:50,609 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -193.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:50,610 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.04 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 02:50:50,610 INFO L168 Benchmark]: Boogie Preprocessor took 13.26 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 02:50:50,613 INFO L168 Benchmark]: RCFGBuilder took 203.77 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:50,614 INFO L168 Benchmark]: TraceAbstraction took 1320.26 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: 86.4 MB). Peak memory consumption was 86.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:50,624 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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 291.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -193.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.04 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. * Boogie Preprocessor took 13.26 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 203.77 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1320.26 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: 86.4 MB). Peak memory consumption was 86.4 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 02:50:52,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:50:52,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:50:52,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:50:52,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:50:52,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:50:52,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:50:52,582 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:50:52,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:50:52,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:50:52,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:50:52,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:50:52,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:50:52,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:50:52,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:50:52,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:50:52,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:50:52,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:50:52,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:50:52,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:50:52,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:50:52,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:50:52,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:50:52,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:50:52,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:50:52,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:50:52,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:50:52,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:50:52,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:50:52,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:50:52,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:50:52,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:50:52,627 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:50:52,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:50:52,629 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:50:52,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:50:52,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:50:52,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:50:52,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:50:52,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:50:52,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:50:52,636 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-11-26 02:50:52,657 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:50:52,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:50:52,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:50:52,659 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:50:52,659 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:50:52,659 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:50:52,659 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:50:52,660 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:50:52,660 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:50:52,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:50:52,661 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:50:52,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:50:52,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:50:52,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:50:52,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:50:52,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:50:52,663 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:50:52,663 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:50:52,663 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:50:52,664 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:50:52,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:50:52,664 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:50:52,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:50:52,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:50:52,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:50:52,665 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:50:52,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:50:52,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:50:52,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:50:52,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:50:52,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:50:52,667 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:50:52,667 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:50:52,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:50:52,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:50:52,668 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_6535d531-b5e9-45e2-b596-b8e10c186ec7/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 -> 5417ea5971c5cfa3624e07fbe8bf33ef4632cb6f [2019-11-26 02:50:52,935 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:50:52,946 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:50:52,949 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:50:52,950 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:50:52,950 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:50:52,951 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/../../sv-benchmarks/c/recursive-simple/sum_2x3-1.c [2019-11-26 02:50:53,011 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/data/cff6824d1/23db0f37a7ab414aa0b7b481c29e6cd0/FLAGf220d5306 [2019-11-26 02:50:53,419 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:50:53,420 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/sv-benchmarks/c/recursive-simple/sum_2x3-1.c [2019-11-26 02:50:53,424 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/data/cff6824d1/23db0f37a7ab414aa0b7b481c29e6cd0/FLAGf220d5306 [2019-11-26 02:50:53,876 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/data/cff6824d1/23db0f37a7ab414aa0b7b481c29e6cd0 [2019-11-26 02:50:53,878 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:50:53,879 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:50:53,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:50:53,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:50:53,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:50:53,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:50:53" (1/1) ... [2019-11-26 02:50:53,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a79901c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:53, skipping insertion in model container [2019-11-26 02:50:53,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:50:53" (1/1) ... [2019-11-26 02:50:53,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:50:53,906 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:50:54,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:50:54,077 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:50:54,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:50:54,106 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:50:54,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:54 WrapperNode [2019-11-26 02:50:54,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:50:54,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:50:54,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:50:54,108 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:50:54,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:54" (1/1) ... [2019-11-26 02:50:54,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:54" (1/1) ... [2019-11-26 02:50:54,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:50:54,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:50:54,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:50:54,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:50:54,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:54" (1/1) ... [2019-11-26 02:50:54,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:54" (1/1) ... [2019-11-26 02:50:54,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:54" (1/1) ... [2019-11-26 02:50:54,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:54" (1/1) ... [2019-11-26 02:50:54,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:54" (1/1) ... [2019-11-26 02:50:54,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:54" (1/1) ... [2019-11-26 02:50:54,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:54" (1/1) ... [2019-11-26 02:50:54,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:50:54,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:50:54,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:50:54,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:50:54,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/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 02:50:54,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:50:54,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:50:54,262 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-26 02:50:54,262 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-26 02:50:54,400 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:50:54,400 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:50:54,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:50:54 BoogieIcfgContainer [2019-11-26 02:50:54,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:50:54,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:50:54,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:50:54,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:50:54,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:50:53" (1/3) ... [2019-11-26 02:50:54,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70316174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:50:54, skipping insertion in model container [2019-11-26 02:50:54,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:54" (2/3) ... [2019-11-26 02:50:54,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70316174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:50:54, skipping insertion in model container [2019-11-26 02:50:54,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:50:54" (3/3) ... [2019-11-26 02:50:54,409 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_2x3-1.c [2019-11-26 02:50:54,418 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:50:54,423 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:50:54,433 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:50:54,466 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:50:54,466 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:50:54,466 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:50:54,467 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:50:54,467 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:50:54,467 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:50:54,467 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:50:54,467 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:50:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-26 02:50:54,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:50:54,496 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:50:54,497 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:50:54,497 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:50:54,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:50:54,503 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-26 02:50:54,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:50:54,513 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2043775170] [2019-11-26 02:50:54,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/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 02:50:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:50:54,591 INFO L255 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:50:54,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:50:54,667 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 02:50:54,667 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:50:54,751 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 02:50:54,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2043775170] [2019-11-26 02:50:54,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:50:54,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-26 02:50:54,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923400882] [2019-11-26 02:50:54,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:50:54,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:50:54,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:50:54,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:50:54,771 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 7 states. [2019-11-26 02:50:54,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:50:54,870 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-26 02:50:54,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:50:54,872 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-26 02:50:54,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:50:54,881 INFO L225 Difference]: With dead ends: 24 [2019-11-26 02:50:54,881 INFO L226 Difference]: Without dead ends: 14 [2019-11-26 02:50:54,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:50:54,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-26 02:50:54,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-26 02:50:54,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-26 02:50:54,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-26 02:50:54,932 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-26 02:50:54,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:50:54,934 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-26 02:50:54,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:50:54,934 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-26 02:50:54,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-26 02:50:54,936 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:50:54,936 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:50:55,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:50:55,139 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:50:55,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:50:55,139 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-26 02:50:55,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:50:55,140 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1830038017] [2019-11-26 02:50:55,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/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 02:50:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:50:55,194 INFO L255 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:50:55,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:50:55,247 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 02:50:55,250 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:50:55,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:50:55,515 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 02:50:55,515 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1830038017] [2019-11-26 02:50:55,515 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281911052] [2019-11-26 02:50:55,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/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 [2019-11-26 02:50:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:50:55,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-26 02:50:55,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:50:55,618 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 02:50:55,618 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:50:55,913 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:50:56,013 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 02:50:56,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:50:56,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7, 8] total 14 [2019-11-26 02:50:56,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001088863] [2019-11-26 02:50:56,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-26 02:50:56,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:50:56,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-26 02:50:56,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-11-26 02:50:56,017 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 14 states. [2019-11-26 02:50:56,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:50:56,223 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-26 02:50:56,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:50:56,224 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2019-11-26 02:50:56,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:50:56,225 INFO L225 Difference]: With dead ends: 21 [2019-11-26 02:50:56,225 INFO L226 Difference]: Without dead ends: 17 [2019-11-26 02:50:56,227 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-11-26 02:50:56,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-26 02:50:56,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-26 02:50:56,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-26 02:50:56,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-26 02:50:56,235 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-26 02:50:56,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:50:56,236 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-26 02:50:56,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-26 02:50:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-26 02:50:56,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-26 02:50:56,240 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:50:56,240 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:50:56,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:50:56,649 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:50:56,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:50:56,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-26 02:50:56,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:50:56,650 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1967926482] [2019-11-26 02:50:56,650 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:50:56,708 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:50:56,708 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-11-26 02:50:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:50:56,762 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-11-26 02:50:56,762 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:50:56,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:50:56,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:50:56 BoogieIcfgContainer [2019-11-26 02:50:56,985 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:50:56,985 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:50:56,985 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:50:56,986 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:50:56,986 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:50:54" (3/4) ... [2019-11-26 02:50:56,989 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:50:57,028 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6535d531-b5e9-45e2-b596-b8e10c186ec7/bin/utaipan/witness.graphml [2019-11-26 02:50:57,028 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:50:57,030 INFO L168 Benchmark]: Toolchain (without parser) took 3150.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 956.4 MB in the beginning and 1.0 GB in the end (delta: -50.4 MB). Peak memory consumption was 104.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:57,031 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:50:57,031 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.79 ms. Allocated memory is still 1.0 GB. Free memory was 956.4 MB in the beginning and 945.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:57,032 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.90 ms. Allocated memory is still 1.0 GB. Free memory is still 945.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:50:57,033 INFO L168 Benchmark]: Boogie Preprocessor took 67.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 945.7 MB in the beginning and 1.2 GB in the end (delta: -206.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:57,033 INFO L168 Benchmark]: RCFGBuilder took 192.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:57,034 INFO L168 Benchmark]: TraceAbstraction took 2582.35 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: 125.4 MB). Peak memory consumption was 125.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:57,034 INFO L168 Benchmark]: Witness Printer took 43.20 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:50:57,036 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 226.79 ms. Allocated memory is still 1.0 GB. Free memory was 956.4 MB in the beginning and 945.7 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 32.90 ms. Allocated memory is still 1.0 GB. Free memory is still 945.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 67.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 945.7 MB in the beginning and 1.2 GB in the end (delta: -206.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 192.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2582.35 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: 125.4 MB). Peak memory consumption was 125.4 MB. Max. memory is 11.5 GB. * Witness Printer took 43.20 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 2; [L13] int b = 3; [L14] CALL, EXPR sum(a, b) VAL [\old(m)=3, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=2, m=3, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=1, m=4, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=0] [L4] COND TRUE n <= 0 [L5] return m + n; VAL [\old(m)=5, \old(n)=0, \result=5, m=5, n=0] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=1, m=4, n=1, sum(n - 1, m + 1)=5] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=2, m=3, n=2, sum(n - 1, m + 1)=5] [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) [L14] int result = sum(a, b); [L15] COND TRUE result == a + b [L16] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 2.5s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 36 SDslu, 52 SDs, 0 SdLazy, 75 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=2, 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: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 72 ConstructedInterpolants, 0 QuantifiedInterpolants, 3888 SizeOfPredicates, 8 NumberOfNonLiveVariables, 71 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 6/16 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 incorrect! Received shutdown request...