./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum01-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_8a22a886-759a-4aba-92a1-892c99553e8b/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_8a22a886-759a-4aba-92a1-892c99553e8b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8a22a886-759a-4aba-92a1-892c99553e8b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8a22a886-759a-4aba-92a1-892c99553e8b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum01-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_8a22a886-759a-4aba-92a1-892c99553e8b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8a22a886-759a-4aba-92a1-892c99553e8b/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 5cba8acfa381c990ec40e4bf9e5d202ee845a576 ............................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.1.25-f470102 [2019-12-07 16:31:31,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 16:31:31,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 16:31:31,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 16:31:31,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 16:31:31,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 16:31:31,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 16:31:31,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 16:31:31,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 16:31:31,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 16:31:31,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 16:31:31,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 16:31:31,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 16:31:31,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 16:31:31,984 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 16:31:31,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 16:31:31,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 16:31:31,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 16:31:31,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 16:31:31,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 16:31:31,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 16:31:31,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 16:31:31,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 16:31:31,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 16:31:31,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 16:31:31,993 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 16:31:31,994 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 16:31:31,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 16:31:31,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 16:31:31,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 16:31:31,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 16:31:31,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 16:31:31,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 16:31:31,996 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 16:31:31,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 16:31:31,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 16:31:31,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 16:31:31,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 16:31:31,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 16:31:31,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 16:31:31,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 16:31:31,999 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8a22a886-759a-4aba-92a1-892c99553e8b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 16:31:32,009 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 16:31:32,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 16:31:32,010 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 16:31:32,010 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 16:31:32,010 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 16:31:32,010 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 16:31:32,010 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 16:31:32,010 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 16:31:32,011 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 16:31:32,011 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 16:31:32,011 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 16:31:32,011 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 16:31:32,011 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 16:31:32,011 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 16:31:32,011 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 16:31:32,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 16:31:32,012 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 16:31:32,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 16:31:32,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 16:31:32,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 16:31:32,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 16:31:32,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 16:31:32,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 16:31:32,013 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 16:31:32,013 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 16:31:32,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 16:31:32,013 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 16:31:32,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 16:31:32,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 16:31:32,013 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 16:31:32,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 16:31:32,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 16:31:32,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 16:31:32,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 16:31:32,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 16:31:32,014 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 16:31:32,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 16:31:32,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 16:31:32,014 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 16:31:32,014 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 16:31:32,014 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_8a22a886-759a-4aba-92a1-892c99553e8b/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 -> 5cba8acfa381c990ec40e4bf9e5d202ee845a576 [2019-12-07 16:31:32,111 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 16:31:32,119 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 16:31:32,121 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 16:31:32,122 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 16:31:32,122 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 16:31:32,123 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8a22a886-759a-4aba-92a1-892c99553e8b/bin/utaipan/../../sv-benchmarks/c/loops/sum01-1.i [2019-12-07 16:31:32,160 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8a22a886-759a-4aba-92a1-892c99553e8b/bin/utaipan/data/9103bce07/d62247e07e28486a9fc1d0543500a8e2/FLAGb0b1ffdc5 [2019-12-07 16:31:32,579 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 16:31:32,579 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8a22a886-759a-4aba-92a1-892c99553e8b/sv-benchmarks/c/loops/sum01-1.i [2019-12-07 16:31:32,583 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8a22a886-759a-4aba-92a1-892c99553e8b/bin/utaipan/data/9103bce07/d62247e07e28486a9fc1d0543500a8e2/FLAGb0b1ffdc5 [2019-12-07 16:31:32,594 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8a22a886-759a-4aba-92a1-892c99553e8b/bin/utaipan/data/9103bce07/d62247e07e28486a9fc1d0543500a8e2 [2019-12-07 16:31:32,596 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 16:31:32,597 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 16:31:32,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 16:31:32,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 16:31:32,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 16:31:32,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:31:32" (1/1) ... [2019-12-07 16:31:32,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27140d55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:31:32, skipping insertion in model container [2019-12-07 16:31:32,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:31:32" (1/1) ... [2019-12-07 16:31:32,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 16:31:32,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 16:31:32,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:31:32,733 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 16:31:32,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:31:32,789 INFO L208 MainTranslator]: Completed translation [2019-12-07 16:31:32,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:31:32 WrapperNode [2019-12-07 16:31:32,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 16:31:32,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 16:31:32,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 16:31:32,790 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 16:31:32,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:31:32" (1/1) ... [2019-12-07 16:31:32,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:31:32" (1/1) ... [2019-12-07 16:31:32,812 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 16:31:32,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 16:31:32,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 16:31:32,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 16:31:32,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:31:32" (1/1) ... [2019-12-07 16:31:32,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:31:32" (1/1) ... [2019-12-07 16:31:32,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:31:32" (1/1) ... [2019-12-07 16:31:32,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:31:32" (1/1) ... [2019-12-07 16:31:32,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:31:32" (1/1) ... [2019-12-07 16:31:32,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:31:32" (1/1) ... [2019-12-07 16:31:32,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:31:32" (1/1) ... [2019-12-07 16:31:32,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 16:31:32,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 16:31:32,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 16:31:32,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 16:31:32,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:31:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8a22a886-759a-4aba-92a1-892c99553e8b/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 16:31:32,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 16:31:32,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 16:31:32,986 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 16:31:32,987 INFO L287 CfgBuilder]: Removed 7 assume(true) statements. [2019-12-07 16:31:32,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:31:32 BoogieIcfgContainer [2019-12-07 16:31:32,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 16:31:32,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 16:31:32,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 16:31:32,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 16:31:32,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 04:31:32" (1/3) ... [2019-12-07 16:31:32,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6624aeec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:31:32, skipping insertion in model container [2019-12-07 16:31:32,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:31:32" (2/3) ... [2019-12-07 16:31:32,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6624aeec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:31:32, skipping insertion in model container [2019-12-07 16:31:32,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:31:32" (3/3) ... [2019-12-07 16:31:32,992 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2019-12-07 16:31:32,999 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 16:31:33,003 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 16:31:33,010 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 16:31:33,024 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 16:31:33,024 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 16:31:33,024 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 16:31:33,024 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 16:31:33,024 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 16:31:33,025 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 16:31:33,025 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 16:31:33,025 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 16:31:33,033 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-12-07 16:31:33,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 16:31:33,036 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:31:33,037 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 16:31:33,037 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:31:33,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:31:33,041 INFO L82 PathProgramCache]: Analyzing trace with hash 988646, now seen corresponding path program 1 times [2019-12-07 16:31:33,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:31:33,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067477767] [2019-12-07 16:31:33,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:31:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:31:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:31:33,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067477767] [2019-12-07 16:31:33,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:31:33,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 16:31:33,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478279567] [2019-12-07 16:31:33,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 16:31:33,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:31:33,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 16:31:33,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:31:33,174 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2019-12-07 16:31:33,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:31:33,205 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-12-07 16:31:33,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 16:31:33,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-12-07 16:31:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:31:33,212 INFO L225 Difference]: With dead ends: 15 [2019-12-07 16:31:33,212 INFO L226 Difference]: Without dead ends: 6 [2019-12-07 16:31:33,214 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 16:31:33,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-12-07 16:31:33,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-12-07 16:31:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-12-07 16:31:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-12-07 16:31:33,235 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-12-07 16:31:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:31:33,235 INFO L462 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-12-07 16:31:33,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 16:31:33,235 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-12-07 16:31:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 16:31:33,235 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:31:33,235 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 16:31:33,235 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:31:33,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:31:33,236 INFO L82 PathProgramCache]: Analyzing trace with hash 30749855, now seen corresponding path program 1 times [2019-12-07 16:31:33,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:31:33,236 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660932029] [2019-12-07 16:31:33,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:31:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:31:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:31:33,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660932029] [2019-12-07 16:31:33,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022292017] [2019-12-07 16:31:33,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8a22a886-759a-4aba-92a1-892c99553e8b/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:31:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:31:33,327 WARN L262 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 16:31:33,331 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:31:33,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:31:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:31:33,375 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 16:31:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:31:33,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [726394406] [2019-12-07 16:31:33,498 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-12-07 16:31:33,499 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 16:31:33,502 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 16:31:33,506 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 16:31:33,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 16:31:33,573 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 16:31:33,609 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 16:31:33,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 16:31:33,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2019-12-07 16:31:33,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826392057] [2019-12-07 16:31:33,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 16:31:33,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:31:33,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 16:31:33,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-12-07 16:31:33,611 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2019-12-07 16:31:33,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:31:33,852 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2019-12-07 16:31:33,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 16:31:33,853 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-12-07 16:31:33,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:31:33,853 INFO L225 Difference]: With dead ends: 14 [2019-12-07 16:31:33,853 INFO L226 Difference]: Without dead ends: 9 [2019-12-07 16:31:33,854 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-07 16:31:33,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-12-07 16:31:33,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-12-07 16:31:33,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-12-07 16:31:33,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-12-07 16:31:33,857 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2019-12-07 16:31:33,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:31:33,858 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-12-07 16:31:33,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 16:31:33,858 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-12-07 16:31:33,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 16:31:33,858 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:31:33,858 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2019-12-07 16:31:34,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:31:34,059 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:31:34,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:31:34,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1342012454, now seen corresponding path program 2 times [2019-12-07 16:31:34,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:31:34,061 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263743921] [2019-12-07 16:31:34,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:31:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:31:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:31:34,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263743921] [2019-12-07 16:31:34,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211326738] [2019-12-07 16:31:34,176 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8a22a886-759a-4aba-92a1-892c99553e8b/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:31:34,196 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 16:31:34,196 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:31:34,197 WARN L262 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-07 16:31:34,198 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:31:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:31:34,269 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 16:31:34,496 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-12-07 16:31:34,729 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2019-12-07 16:31:35,015 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 90 [2019-12-07 16:31:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:31:35,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1915550535] [2019-12-07 16:31:35,018 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-12-07 16:31:35,019 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 16:31:35,019 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 16:31:35,019 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 16:31:35,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 16:31:35,050 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 16:31:35,095 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 16:31:35,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 16:31:35,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2019-12-07 16:31:35,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939676351] [2019-12-07 16:31:35,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 16:31:35,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:31:35,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 16:31:35,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2019-12-07 16:31:35,097 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 19 states. [2019-12-07 16:31:35,534 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 48 [2019-12-07 16:31:35,783 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 50 [2019-12-07 16:31:35,947 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 48 [2019-12-07 16:31:36,103 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 50 [2019-12-07 16:31:36,373 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2019-12-07 16:31:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:31:36,572 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2019-12-07 16:31:36,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 16:31:36,573 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 8 [2019-12-07 16:31:36,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:31:36,574 INFO L225 Difference]: With dead ends: 23 [2019-12-07 16:31:36,574 INFO L226 Difference]: Without dead ends: 15 [2019-12-07 16:31:36,575 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2019-12-07 16:31:36,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-07 16:31:36,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-12-07 16:31:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-12-07 16:31:36,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-12-07 16:31:36,579 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2019-12-07 16:31:36,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:31:36,580 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-12-07 16:31:36,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 16:31:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-12-07 16:31:36,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 16:31:36,581 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:31:36,581 INFO L410 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2019-12-07 16:31:36,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:31:36,782 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:31:36,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:31:36,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1633253766, now seen corresponding path program 3 times [2019-12-07 16:31:36,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:31:36,783 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158998910] [2019-12-07 16:31:36,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:31:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:31:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:31:36,840 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 16:31:36,840 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 16:31:36,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 04:31:36 BoogieIcfgContainer [2019-12-07 16:31:36,854 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 16:31:36,854 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 16:31:36,854 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 16:31:36,854 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 16:31:36,855 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:31:32" (3/4) ... [2019-12-07 16:31:36,856 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 16:31:36,890 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8a22a886-759a-4aba-92a1-892c99553e8b/bin/utaipan/witness.graphml [2019-12-07 16:31:36,890 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 16:31:36,891 INFO L168 Benchmark]: Toolchain (without parser) took 4293.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -200.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:31:36,891 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 955.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:31:36,892 INFO L168 Benchmark]: CACSL2BoogieTranslator took 191.47 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 113.2 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -170.8 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. [2019-12-07 16:31:36,892 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.00 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:31:36,892 INFO L168 Benchmark]: Boogie Preprocessor took 12.17 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:31:36,892 INFO L168 Benchmark]: RCFGBuilder took 163.27 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2019-12-07 16:31:36,893 INFO L168 Benchmark]: TraceAbstraction took 3865.79 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 38.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -51.0 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:31:36,893 INFO L168 Benchmark]: Witness Printer took 36.06 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 11.5 GB. [2019-12-07 16:31:36,895 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 955.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 191.47 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 113.2 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -170.8 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 22.00 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 12.17 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 163.27 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3865.79 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 38.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -51.0 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 36.06 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Result: UNSAFE, OverallTime: 3.8s, OverallIterations: 4, TraceHistogramMax: 10, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 33 SDslu, 32 SDs, 0 SdLazy, 83 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=3, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 5340 SizeOfPredicates, 12 NumberOfNonLiveVariables, 52 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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...