./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-1.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_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/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 59c5766d3cddc0d41e2678bb5221cccc60217431 ........................................................................................................................................................................................................................................................................................................................................... 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_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/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 59c5766d3cddc0d41e2678bb5221cccc60217431 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 02:49:14,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:49:14,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:49:14,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:49:14,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:49:14,895 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:49:14,896 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:49:14,905 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:49:14,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:49:14,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:49:14,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:49:14,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:49:14,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:49:14,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:49:14,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:49:14,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:49:14,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:49:14,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:49:14,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:49:14,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:49:14,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:49:14,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:49:14,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:49:14,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:49:14,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:49:14,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:49:14,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:49:14,940 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:49:14,940 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:49:14,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:49:14,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:49:14,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:49:14,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:49:14,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:49:14,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:49:14,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:49:14,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:49:14,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:49:14,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:49:14,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:49:14,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:49:14,948 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:49:14,973 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:49:14,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:49:14,973 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:49:14,974 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:49:14,974 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:49:14,974 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:49:14,974 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:49:14,974 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:49:14,975 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:49:14,975 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:49:14,975 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:49:14,975 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:49:14,975 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:49:14,975 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:49:14,976 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:49:14,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:49:14,976 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:49:14,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:49:14,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:49:14,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:49:14,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:49:14,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:49:14,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:49:14,978 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:49:14,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:49:14,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:49:14,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:49:14,978 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:49:14,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:49:14,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:49:14,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:49:14,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:49:14,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:49:14,980 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:49:14,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:49:14,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:49:14,980 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:49:14,980 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_ba239e3c-571c-486c-91c0-6559cc9d2e36/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 -> 59c5766d3cddc0d41e2678bb5221cccc60217431 [2019-11-26 02:49:15,159 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:49:15,174 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:49:15,177 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:49:15,178 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:49:15,179 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:49:15,180 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c [2019-11-26 02:49:15,236 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/data/c6f9b490d/018622b2655e4ca3b65e5a3436d79671/FLAGc946d2628 [2019-11-26 02:49:15,637 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:49:15,638 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c [2019-11-26 02:49:15,644 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/data/c6f9b490d/018622b2655e4ca3b65e5a3436d79671/FLAGc946d2628 [2019-11-26 02:49:16,088 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/data/c6f9b490d/018622b2655e4ca3b65e5a3436d79671 [2019-11-26 02:49:16,091 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:49:16,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:49:16,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:49:16,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:49:16,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:49:16,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:49:16" (1/1) ... [2019-11-26 02:49:16,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5371c58b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:16, skipping insertion in model container [2019-11-26 02:49:16,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:49:16" (1/1) ... [2019-11-26 02:49:16,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:49:16,132 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:49:16,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:49:16,323 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:49:16,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:49:16,416 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:49:16,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:16 WrapperNode [2019-11-26 02:49:16,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:49:16,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:49:16,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:49:16,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:49:16,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:16" (1/1) ... [2019-11-26 02:49:16,431 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:16" (1/1) ... [2019-11-26 02:49:16,444 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:49:16,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:49:16,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:49:16,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:49:16,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:16" (1/1) ... [2019-11-26 02:49:16,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:16" (1/1) ... [2019-11-26 02:49:16,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:16" (1/1) ... [2019-11-26 02:49:16,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:16" (1/1) ... [2019-11-26 02:49:16,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:16" (1/1) ... [2019-11-26 02:49:16,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:16" (1/1) ... [2019-11-26 02:49:16,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:16" (1/1) ... [2019-11-26 02:49:16,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:49:16,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:49:16,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:49:16,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:49:16,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/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 02:49:16,510 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2019-11-26 02:49:16,510 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2019-11-26 02:49:16,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:49:16,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:49:16,511 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-26 02:49:16,511 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-26 02:49:16,758 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:49:16,758 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:49:16,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:49:16 BoogieIcfgContainer [2019-11-26 02:49:16,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:49:16,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:49:16,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:49:16,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:49:16,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:49:16" (1/3) ... [2019-11-26 02:49:16,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fca640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:49:16, skipping insertion in model container [2019-11-26 02:49:16,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:16" (2/3) ... [2019-11-26 02:49:16,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fca640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:49:16, skipping insertion in model container [2019-11-26 02:49:16,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:49:16" (3/3) ... [2019-11-26 02:49:16,766 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-1.c [2019-11-26 02:49:16,786 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:49:16,792 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:49:16,802 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:49:16,827 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:49:16,827 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:49:16,828 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:49:16,828 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:49:16,828 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:49:16,828 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:49:16,828 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:49:16,828 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:49:16,847 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-26 02:49:16,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:49:16,852 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:49:16,852 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:49:16,853 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:49:16,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:49:16,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2105267373, now seen corresponding path program 1 times [2019-11-26 02:49:16,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:49:16,864 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553200829] [2019-11-26 02:49:16,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:49:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:49:17,055 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 02:49:17,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553200829] [2019-11-26 02:49:17,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:49:17,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-26 02:49:17,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63108123] [2019-11-26 02:49:17,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:49:17,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:49:17,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:49:17,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:49:17,074 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 7 states. [2019-11-26 02:49:17,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:49:17,216 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2019-11-26 02:49:17,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:49:17,217 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-26 02:49:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:49:17,226 INFO L225 Difference]: With dead ends: 30 [2019-11-26 02:49:17,226 INFO L226 Difference]: Without dead ends: 20 [2019-11-26 02:49:17,229 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 02:49:17,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-26 02:49:17,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-26 02:49:17,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-26 02:49:17,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-26 02:49:17,265 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2019-11-26 02:49:17,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:49:17,265 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-26 02:49:17,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:49:17,266 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-26 02:49:17,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-26 02:49:17,267 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:49:17,267 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:49:17,268 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:49:17,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:49:17,268 INFO L82 PathProgramCache]: Analyzing trace with hash -131148366, now seen corresponding path program 1 times [2019-11-26 02:49:17,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:49:17,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184035890] [2019-11-26 02:49:17,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:49:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:49:17,409 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 02:49:17,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184035890] [2019-11-26 02:49:17,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:49:17,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-26 02:49:17,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056719799] [2019-11-26 02:49:17,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-26 02:49:17,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:49:17,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-26 02:49:17,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:49:17,412 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2019-11-26 02:49:17,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:49:17,616 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-11-26 02:49:17,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-26 02:49:17,617 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-26 02:49:17,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:49:17,618 INFO L225 Difference]: With dead ends: 29 [2019-11-26 02:49:17,618 INFO L226 Difference]: Without dead ends: 25 [2019-11-26 02:49:17,619 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:49:17,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-26 02:49:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-11-26 02:49:17,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-26 02:49:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-11-26 02:49:17,625 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2019-11-26 02:49:17,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:49:17,626 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-11-26 02:49:17,626 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-26 02:49:17,626 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-11-26 02:49:17,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-26 02:49:17,627 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:49:17,628 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:49:17,628 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:49:17,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:49:17,628 INFO L82 PathProgramCache]: Analyzing trace with hash -132605643, now seen corresponding path program 1 times [2019-11-26 02:49:17,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:49:17,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255987777] [2019-11-26 02:49:17,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:49:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:49:17,784 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 02:49:17,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255987777] [2019-11-26 02:49:17,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103462365] [2019-11-26 02:49:17,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/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 02:49:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:49:17,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:49:17,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:49:17,919 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 02:49:17,920 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:49:18,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:18,325 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:18,389 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 02:49:18,390 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [178773652] [2019-11-26 02:49:18,411 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-26 02:49:18,412 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:49:18,418 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: IllegalArgumentException [2019-11-26 02:49:18,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:49:18,626 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 02:49:18,630 INFO L168 Benchmark]: Toolchain (without parser) took 2537.45 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 950.1 MB in the beginning and 938.7 MB in the end (delta: 11.5 MB). Peak memory consumption was 130.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:49:18,631 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:49:18,631 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.31 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -160.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:49:18,632 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.02 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:49:18,632 INFO L168 Benchmark]: Boogie Preprocessor took 14.09 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:49:18,633 INFO L168 Benchmark]: RCFGBuilder took 301.00 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: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:49:18,633 INFO L168 Benchmark]: TraceAbstraction took 1868.26 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 938.7 MB in the end (delta: 150.4 MB). Peak memory consumption was 150.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:49:18,638 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 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 324.31 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -160.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.02 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.09 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 301.00 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: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1868.26 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 938.7 MB in the end (delta: 150.4 MB). Peak memory consumption was 150.4 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 02:49:20,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:49:20,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:49:20,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:49:20,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:49:20,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:49:20,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:49:20,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:49:20,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:49:20,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:49:20,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:49:20,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:49:20,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:49:20,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:49:20,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:49:20,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:49:20,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:49:20,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:49:20,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:49:20,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:49:20,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:49:20,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:49:20,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:49:20,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:49:20,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:49:20,546 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:49:20,546 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:49:20,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:49:20,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:49:20,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:49:20,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:49:20,549 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:49:20,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:49:20,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:49:20,552 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:49:20,552 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:49:20,553 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:49:20,553 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:49:20,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:49:20,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:49:20,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:49:20,556 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-11-26 02:49:20,570 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:49:20,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:49:20,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:49:20,576 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:49:20,577 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:49:20,577 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:49:20,577 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:49:20,578 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:49:20,578 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:49:20,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:49:20,580 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:49:20,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:49:20,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:49:20,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:49:20,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:49:20,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:49:20,581 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:49:20,582 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:49:20,582 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:49:20,582 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:49:20,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:49:20,583 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:49:20,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:49:20,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:49:20,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:49:20,584 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:49:20,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:49:20,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:49:20,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:49:20,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:49:20,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:49:20,586 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:49:20,586 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:49:20,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:49:20,586 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:49:20,587 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_ba239e3c-571c-486c-91c0-6559cc9d2e36/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 -> 59c5766d3cddc0d41e2678bb5221cccc60217431 [2019-11-26 02:49:20,844 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:49:20,855 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:49:20,858 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:49:20,859 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:49:20,859 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:49:20,860 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c [2019-11-26 02:49:20,913 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/data/86c80b09d/1a873af46e4449bc89861e3ca17db891/FLAG3e06ff3ef [2019-11-26 02:49:21,273 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:49:21,274 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c [2019-11-26 02:49:21,278 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/data/86c80b09d/1a873af46e4449bc89861e3ca17db891/FLAG3e06ff3ef [2019-11-26 02:49:21,652 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/data/86c80b09d/1a873af46e4449bc89861e3ca17db891 [2019-11-26 02:49:21,654 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:49:21,655 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:49:21,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:49:21,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:49:21,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:49:21,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:49:21" (1/1) ... [2019-11-26 02:49:21,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64ff811d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:21, skipping insertion in model container [2019-11-26 02:49:21,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:49:21" (1/1) ... [2019-11-26 02:49:21,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:49:21,684 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:49:21,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:49:21,852 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:49:21,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:49:21,876 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:49:21,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:21 WrapperNode [2019-11-26 02:49:21,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:49:21,877 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:49:21,877 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:49:21,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:49:21,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:21" (1/1) ... [2019-11-26 02:49:21,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:21" (1/1) ... [2019-11-26 02:49:21,906 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:49:21,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:49:21,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:49:21,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:49:21,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:21" (1/1) ... [2019-11-26 02:49:21,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:21" (1/1) ... [2019-11-26 02:49:21,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:21" (1/1) ... [2019-11-26 02:49:21,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:21" (1/1) ... [2019-11-26 02:49:21,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:21" (1/1) ... [2019-11-26 02:49:21,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:21" (1/1) ... [2019-11-26 02:49:21,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:21" (1/1) ... [2019-11-26 02:49:21,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:49:21,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:49:21,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:49:21,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:49:21,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:21" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/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 02:49:22,021 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2019-11-26 02:49:22,021 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2019-11-26 02:49:22,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:49:22,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:49:22,022 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-26 02:49:22,022 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-26 02:49:22,172 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:49:22,173 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:49:22,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:49:22 BoogieIcfgContainer [2019-11-26 02:49:22,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:49:22,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:49:22,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:49:22,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:49:22,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:49:21" (1/3) ... [2019-11-26 02:49:22,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d57fe7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:49:22, skipping insertion in model container [2019-11-26 02:49:22,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:21" (2/3) ... [2019-11-26 02:49:22,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d57fe7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:49:22, skipping insertion in model container [2019-11-26 02:49:22,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:49:22" (3/3) ... [2019-11-26 02:49:22,182 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-1.c [2019-11-26 02:49:22,191 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:49:22,196 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:49:22,206 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:49:22,224 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:49:22,224 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:49:22,224 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:49:22,224 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:49:22,224 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:49:22,225 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:49:22,225 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:49:22,225 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:49:22,240 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-26 02:49:22,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:49:22,244 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:49:22,245 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:49:22,245 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:49:22,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:49:22,249 INFO L82 PathProgramCache]: Analyzing trace with hash 2105267373, now seen corresponding path program 1 times [2019-11-26 02:49:22,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:49:22,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1750351074] [2019-11-26 02:49:22,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/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 02:49:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:49:22,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:49:22,315 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:49:22,378 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 02:49:22,378 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:49:22,478 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 02:49:22,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1750351074] [2019-11-26 02:49:22,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:49:22,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-26 02:49:22,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605382240] [2019-11-26 02:49:22,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:49:22,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:49:22,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:49:22,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:49:22,500 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 7 states. [2019-11-26 02:49:22,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:49:22,593 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-11-26 02:49:22,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:49:22,596 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-26 02:49:22,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:49:22,607 INFO L225 Difference]: With dead ends: 30 [2019-11-26 02:49:22,607 INFO L226 Difference]: Without dead ends: 20 [2019-11-26 02:49:22,613 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 02:49:22,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-26 02:49:22,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-26 02:49:22,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-26 02:49:22,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-26 02:49:22,658 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2019-11-26 02:49:22,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:49:22,659 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-26 02:49:22,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:49:22,659 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-26 02:49:22,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-26 02:49:22,661 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:49:22,661 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:49:22,863 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:49:22,863 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:49:22,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:49:22,864 INFO L82 PathProgramCache]: Analyzing trace with hash -131148366, now seen corresponding path program 1 times [2019-11-26 02:49:22,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:49:22,864 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2022882240] [2019-11-26 02:49:22,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/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 02:49:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:49:22,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:49:22,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:49:22,957 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 02:49:22,957 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:49:23,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:23,172 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 02:49:23,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2022882240] [2019-11-26 02:49:23,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:49:23,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2019-11-26 02:49:23,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183620505] [2019-11-26 02:49:23,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-26 02:49:23,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:49:23,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-26 02:49:23,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:49:23,176 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2019-11-26 02:49:23,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:49:23,299 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-11-26 02:49:23,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:49:23,300 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-26 02:49:23,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:49:23,301 INFO L225 Difference]: With dead ends: 29 [2019-11-26 02:49:23,302 INFO L226 Difference]: Without dead ends: 25 [2019-11-26 02:49:23,303 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-26 02:49:23,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-26 02:49:23,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-11-26 02:49:23,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-26 02:49:23,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-11-26 02:49:23,310 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2019-11-26 02:49:23,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:49:23,310 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-11-26 02:49:23,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-26 02:49:23,311 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-11-26 02:49:23,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-26 02:49:23,312 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:49:23,312 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:49:23,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:49:23,514 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:49:23,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:49:23,515 INFO L82 PathProgramCache]: Analyzing trace with hash -132605643, now seen corresponding path program 1 times [2019-11-26 02:49:23,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:49:23,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [673663567] [2019-11-26 02:49:23,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:49:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:49:23,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:49:23,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:49:23,620 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 02:49:23,620 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:49:23,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:23,953 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:23,977 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 02:49:23,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [673663567] [2019-11-26 02:49:23,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748123046] [2019-11-26 02:49:23,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:49:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:49:24,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:49:24,029 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:49:24,045 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 02:49:24,046 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:49:24,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:24,370 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:24,376 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 02:49:24,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:49:24,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9] total 12 [2019-11-26 02:49:24,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289402985] [2019-11-26 02:49:24,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-26 02:49:24,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:49:24,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-26 02:49:24,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-26 02:49:24,378 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 12 states. [2019-11-26 02:49:24,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:49:24,534 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-11-26 02:49:24,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:49:24,535 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2019-11-26 02:49:24,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:49:24,536 INFO L225 Difference]: With dead ends: 35 [2019-11-26 02:49:24,536 INFO L226 Difference]: Without dead ends: 31 [2019-11-26 02:49:24,537 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:49:24,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-26 02:49:24,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-11-26 02:49:24,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-26 02:49:24,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-11-26 02:49:24,541 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2019-11-26 02:49:24,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:49:24,542 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-11-26 02:49:24,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-26 02:49:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-11-26 02:49:24,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-26 02:49:24,543 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:49:24,543 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:49:24,944 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:49:24,944 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:49:24,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:49:24,944 INFO L82 PathProgramCache]: Analyzing trace with hash -614490246, now seen corresponding path program 1 times [2019-11-26 02:49:24,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:49:24,945 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [491268593] [2019-11-26 02:49:24,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:49:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:49:24,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:49:24,992 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:49:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-26 02:49:25,071 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:49:25,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:25,451 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:25,495 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:49:25,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [491268593] [2019-11-26 02:49:25,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686264008] [2019-11-26 02:49:25,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:49:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:49:25,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:49:25,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:49:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-26 02:49:25,560 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:49:25,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:25,853 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:25,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:49:25,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:49:25,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9, 11] total 14 [2019-11-26 02:49:25,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464033105] [2019-11-26 02:49:25,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-26 02:49:25,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:49:25,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-26 02:49:25,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2019-11-26 02:49:25,916 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 14 states. [2019-11-26 02:49:26,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:49:26,051 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-11-26 02:49:26,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-26 02:49:26,052 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2019-11-26 02:49:26,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:49:26,053 INFO L225 Difference]: With dead ends: 41 [2019-11-26 02:49:26,053 INFO L226 Difference]: Without dead ends: 37 [2019-11-26 02:49:26,054 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2019-11-26 02:49:26,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-26 02:49:26,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2019-11-26 02:49:26,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-26 02:49:26,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-11-26 02:49:26,060 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2019-11-26 02:49:26,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:49:26,062 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-11-26 02:49:26,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-26 02:49:26,063 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-11-26 02:49:26,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-26 02:49:26,064 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:49:26,065 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:49:26,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:49:26,472 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:49:26,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:49:26,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2127867459, now seen corresponding path program 2 times [2019-11-26 02:49:26,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:49:26,473 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1730010592] [2019-11-26 02:49:26,473 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:49:26,511 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:49:26,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:49:26,512 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:49:26,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:49:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-26 02:49:26,603 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:49:26,915 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:27,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:27,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:27,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:49:27,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1730010592] [2019-11-26 02:49:27,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118016308] [2019-11-26 02:49:27,167 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:49:27,197 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:49:27,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:49:27,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:49:27,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:49:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-26 02:49:27,216 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:49:27,496 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:27,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:27,652 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:27,686 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:49:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:49:27,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:49:27,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10, 13] total 16 [2019-11-26 02:49:27,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950198142] [2019-11-26 02:49:27,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-26 02:49:27,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:49:27,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-26 02:49:27,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2019-11-26 02:49:27,712 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 16 states. [2019-11-26 02:49:27,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:49:27,893 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2019-11-26 02:49:27,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-26 02:49:27,894 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2019-11-26 02:49:27,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:49:27,895 INFO L225 Difference]: With dead ends: 47 [2019-11-26 02:49:27,895 INFO L226 Difference]: Without dead ends: 43 [2019-11-26 02:49:27,896 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2019-11-26 02:49:27,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-26 02:49:27,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2019-11-26 02:49:27,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-26 02:49:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-11-26 02:49:27,902 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 33 [2019-11-26 02:49:27,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:49:27,903 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-11-26 02:49:27,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-26 02:49:27,903 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-11-26 02:49:27,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-26 02:49:27,904 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:49:27,904 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:49:28,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:49:28,305 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:49:28,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:49:28,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1002836670, now seen corresponding path program 2 times [2019-11-26 02:49:28,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:49:28,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1469710549] [2019-11-26 02:49:28,306 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:49:28,373 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:49:28,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-11-26 02:49:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:49:28,428 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-11-26 02:49:28,428 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:49:28,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:49:28,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:49:28 BoogieIcfgContainer [2019-11-26 02:49:28,652 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:49:28,653 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:49:28,653 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:49:28,653 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:49:28,653 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:49:22" (3/4) ... [2019-11-26 02:49:28,655 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:49:28,698 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ba239e3c-571c-486c-91c0-6559cc9d2e36/bin/utaipan/witness.graphml [2019-11-26 02:49:28,698 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:49:28,700 INFO L168 Benchmark]: Toolchain (without parser) took 7044.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 214.4 MB). Free memory was 956.4 MB in the beginning and 982.6 MB in the end (delta: -26.2 MB). Peak memory consumption was 188.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:49:28,701 INFO L168 Benchmark]: CDTParser took 0.23 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 02:49:28,701 INFO L168 Benchmark]: CACSL2BoogieTranslator took 219.94 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 02:49:28,702 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.02 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 02:49:28,702 INFO L168 Benchmark]: Boogie Preprocessor took 69.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 945.7 MB in the beginning and 1.2 GB in the end (delta: -208.9 MB). Peak memory consumption was 15.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:49:28,703 INFO L168 Benchmark]: RCFGBuilder took 198.51 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: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:49:28,703 INFO L168 Benchmark]: TraceAbstraction took 6477.01 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 55.1 MB). Free memory was 1.1 GB in the beginning and 982.6 MB in the end (delta: 154.8 MB). Peak memory consumption was 209.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:49:28,703 INFO L168 Benchmark]: Witness Printer took 45.88 ms. Allocated memory is still 1.2 GB. Free memory is still 982.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:49:28,706 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 219.94 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 29.02 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 69.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 945.7 MB in the beginning and 1.2 GB in the end (delta: -208.9 MB). Peak memory consumption was 15.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 198.51 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: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6477.01 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 55.1 MB). Free memory was 1.1 GB in the beginning and 982.6 MB in the end (delta: 154.8 MB). Peak memory consumption was 209.8 MB. Max. memory is 11.5 GB. * Witness Printer took 45.88 ms. Allocated memory is still 1.2 GB. Free memory is still 982.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 21]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L18] int input = 5; [L19] CALL, EXPR id(input) VAL [\old(x)=5] [L8] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L9] CALL, EXPR id2(x-1) VAL [\old(x)=4] [L13] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L14] CALL, EXPR id(x-1) VAL [\old(x)=3] [L8] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L9] CALL, EXPR id2(x-1) VAL [\old(x)=2] [L13] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L14] CALL, EXPR id(x-1) VAL [\old(x)=1] [L8] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L9] CALL, EXPR id2(x-1) VAL [\old(x)=0] [L13] COND TRUE x==0 [L13] return 0; VAL [\old(x)=0, \result=0, x=0] [L9] RET, EXPR id2(x-1) VAL [\old(x)=1, id2(x-1)=0, x=1] [L9] return id2(x-1) + 1; [L14] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L14] return id(x-1) + 1; [L9] RET, EXPR id2(x-1) VAL [\old(x)=3, id2(x-1)=2, x=3] [L9] return id2(x-1) + 1; [L14] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L14] return id(x-1) + 1; [L9] RET, EXPR id2(x-1) VAL [\old(x)=5, id2(x-1)=4, x=5] [L9] return id2(x-1) + 1; [L19] RET, EXPR id(input) [L19] int result = id(input); [L20] COND TRUE result == 5 [L21] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 21 locations, 1 error locations. Result: UNSAFE, OverallTime: 6.4s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 87 SDtfs, 102 SDslu, 434 SDs, 0 SdLazy, 339 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 371 GetRequests, 299 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=5, 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, 5 MinimizatonAttempts, 26 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 225 NumberOfCodeBlocks, 225 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 356 ConstructedInterpolants, 0 QuantifiedInterpolants, 34256 SizeOfPredicates, 35 NumberOfNonLiveVariables, 264 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 48/136 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...