./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invariants/even.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_dbc214a6-9ca9-40ce-aa34-dee3aa55b696/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_dbc214a6-9ca9-40ce-aa34-dee3aa55b696/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_dbc214a6-9ca9-40ce-aa34-dee3aa55b696/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_dbc214a6-9ca9-40ce-aa34-dee3aa55b696/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invariants/even.c -s /tmp/vcloud-vcloud-master/worker/run_dir_dbc214a6-9ca9-40ce-aa34-dee3aa55b696/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_dbc214a6-9ca9-40ce-aa34-dee3aa55b696/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 0da6bb15567d40fa620ab6e47e9e189bd3f064b0 .............................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 21:24:14,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 21:24:14,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 21:24:14,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 21:24:14,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 21:24:14,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 21:24:14,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 21:24:14,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 21:24:14,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 21:24:14,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 21:24:14,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 21:24:14,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 21:24:14,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 21:24:14,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 21:24:14,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 21:24:14,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 21:24:14,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 21:24:14,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 21:24:14,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 21:24:14,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 21:24:14,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 21:24:14,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 21:24:14,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 21:24:14,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 21:24:14,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 21:24:14,943 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 21:24:14,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 21:24:14,944 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 21:24:14,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 21:24:14,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 21:24:14,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 21:24:14,945 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 21:24:14,946 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 21:24:14,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 21:24:14,947 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 21:24:14,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 21:24:14,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 21:24:14,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 21:24:14,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 21:24:14,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 21:24:14,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 21:24:14,949 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_dbc214a6-9ca9-40ce-aa34-dee3aa55b696/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 21:24:14,958 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 21:24:14,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 21:24:14,959 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 21:24:14,959 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 21:24:14,959 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 21:24:14,959 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 21:24:14,959 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 21:24:14,959 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 21:24:14,959 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 21:24:14,960 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 21:24:14,960 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 21:24:14,960 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 21:24:14,960 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 21:24:14,960 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 21:24:14,960 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 21:24:14,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 21:24:14,961 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 21:24:14,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 21:24:14,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 21:24:14,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 21:24:14,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 21:24:14,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 21:24:14,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 21:24:14,961 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 21:24:14,961 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 21:24:14,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 21:24:14,962 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 21:24:14,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 21:24:14,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 21:24:14,962 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 21:24:14,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 21:24:14,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 21:24:14,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 21:24:14,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 21:24:14,963 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 21:24:14,963 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 21:24:14,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 21:24:14,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 21:24:14,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 21:24:14,963 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 21:24:14,963 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_dbc214a6-9ca9-40ce-aa34-dee3aa55b696/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 -> 0da6bb15567d40fa620ab6e47e9e189bd3f064b0 [2019-12-07 21:24:15,061 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 21:24:15,069 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 21:24:15,071 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 21:24:15,073 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 21:24:15,073 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 21:24:15,074 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_dbc214a6-9ca9-40ce-aa34-dee3aa55b696/bin/utaipan/../../sv-benchmarks/c/loop-invariants/even.c [2019-12-07 21:24:15,121 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dbc214a6-9ca9-40ce-aa34-dee3aa55b696/bin/utaipan/data/5b19f3163/4b04d00d1c7b40939fd42b48924898d7/FLAGf3b04b86e [2019-12-07 21:24:15,506 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 21:24:15,506 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_dbc214a6-9ca9-40ce-aa34-dee3aa55b696/sv-benchmarks/c/loop-invariants/even.c [2019-12-07 21:24:15,510 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dbc214a6-9ca9-40ce-aa34-dee3aa55b696/bin/utaipan/data/5b19f3163/4b04d00d1c7b40939fd42b48924898d7/FLAGf3b04b86e [2019-12-07 21:24:15,899 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_dbc214a6-9ca9-40ce-aa34-dee3aa55b696/bin/utaipan/data/5b19f3163/4b04d00d1c7b40939fd42b48924898d7 [2019-12-07 21:24:15,901 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 21:24:15,902 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 21:24:15,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 21:24:15,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 21:24:15,905 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 21:24:15,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:24:15" (1/1) ... [2019-12-07 21:24:15,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@326f0e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:24:15, skipping insertion in model container [2019-12-07 21:24:15,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:24:15" (1/1) ... [2019-12-07 21:24:15,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 21:24:15,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 21:24:16,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:24:16,026 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 21:24:16,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:24:16,080 INFO L208 MainTranslator]: Completed translation [2019-12-07 21:24:16,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:24:16 WrapperNode [2019-12-07 21:24:16,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 21:24:16,081 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 21:24:16,081 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 21:24:16,081 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 21:24:16,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:24:16" (1/1) ... [2019-12-07 21:24:16,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:24:16" (1/1) ... [2019-12-07 21:24:16,100 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 21:24:16,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 21:24:16,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 21:24:16,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 21:24:16,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:24:16" (1/1) ... [2019-12-07 21:24:16,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:24:16" (1/1) ... [2019-12-07 21:24:16,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:24:16" (1/1) ... [2019-12-07 21:24:16,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:24:16" (1/1) ... [2019-12-07 21:24:16,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:24:16" (1/1) ... [2019-12-07 21:24:16,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:24:16" (1/1) ... [2019-12-07 21:24:16,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:24:16" (1/1) ... [2019-12-07 21:24:16,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 21:24:16,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 21:24:16,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 21:24:16,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 21:24:16,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:24:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbc214a6-9ca9-40ce-aa34-dee3aa55b696/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 21:24:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 21:24:16,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 21:24:16,247 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 21:24:16,247 INFO L287 CfgBuilder]: Removed 7 assume(true) statements. [2019-12-07 21:24:16,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:24:16 BoogieIcfgContainer [2019-12-07 21:24:16,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 21:24:16,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 21:24:16,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 21:24:16,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 21:24:16,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 09:24:15" (1/3) ... [2019-12-07 21:24:16,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c795700 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:24:16, skipping insertion in model container [2019-12-07 21:24:16,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:24:16" (2/3) ... [2019-12-07 21:24:16,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c795700 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:24:16, skipping insertion in model container [2019-12-07 21:24:16,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:24:16" (3/3) ... [2019-12-07 21:24:16,252 INFO L109 eAbstractionObserver]: Analyzing ICFG even.c [2019-12-07 21:24:16,258 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 21:24:16,262 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 21:24:16,269 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 21:24:16,283 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 21:24:16,283 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 21:24:16,284 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 21:24:16,284 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 21:24:16,284 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 21:24:16,284 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 21:24:16,284 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 21:24:16,284 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 21:24:16,292 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-12-07 21:24:16,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 21:24:16,295 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:24:16,296 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 21:24:16,296 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:24:16,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:24:16,300 INFO L82 PathProgramCache]: Analyzing trace with hash 29954948, now seen corresponding path program 1 times [2019-12-07 21:24:16,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:24:16,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134112790] [2019-12-07 21:24:16,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:24:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:24:16,369 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 21:24:16,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134112790] [2019-12-07 21:24:16,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:24:16,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 21:24:16,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383919526] [2019-12-07 21:24:16,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 21:24:16,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:24:16,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 21:24:16,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 21:24:16,385 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 2 states. [2019-12-07 21:24:16,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:24:16,395 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2019-12-07 21:24:16,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 21:24:16,396 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-12-07 21:24:16,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:24:16,402 INFO L225 Difference]: With dead ends: 15 [2019-12-07 21:24:16,402 INFO L226 Difference]: Without dead ends: 7 [2019-12-07 21:24:16,404 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 21:24:16,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-12-07 21:24:16,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-12-07 21:24:16,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-12-07 21:24:16,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-12-07 21:24:16,425 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-12-07 21:24:16,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:24:16,425 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-12-07 21:24:16,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 21:24:16,425 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-12-07 21:24:16,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 21:24:16,425 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:24:16,425 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 21:24:16,425 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:24:16,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:24:16,426 INFO L82 PathProgramCache]: Analyzing trace with hash 921957070, now seen corresponding path program 1 times [2019-12-07 21:24:16,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:24:16,426 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804269268] [2019-12-07 21:24:16,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:24:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:24:18,553 WARN L192 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2019-12-07 21:24:18,559 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 21:24:18,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804269268] [2019-12-07 21:24:18,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:24:18,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 21:24:18,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481544529] [2019-12-07 21:24:18,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 21:24:18,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:24:18,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 21:24:18,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 21:24:18,562 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2019-12-07 21:24:18,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:24:18,584 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2019-12-07 21:24:18,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 21:24:18,584 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-12-07 21:24:18,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:24:18,584 INFO L225 Difference]: With dead ends: 7 [2019-12-07 21:24:18,584 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 21:24:18,585 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 21:24:18,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 21:24:18,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 21:24:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 21:24:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 21:24:18,585 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2019-12-07 21:24:18,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:24:18,586 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 21:24:18,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 21:24:18,586 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 21:24:18,586 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 21:24:18,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 21:24:18,601 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 21:24:18,601 INFO L246 CegarLoopResult]: For program point L11-1(lines 11 13) no Hoare annotation was computed. [2019-12-07 21:24:18,601 INFO L242 CegarLoopResult]: At program point L11-3(lines 11 13) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 (let ((.cse0 (div ULTIMATE.start_main_~x~0 2))) (+ (* 2 .cse0) (* 4294967296 (div (+ (* .cse0 (- 2)) ULTIMATE.start_main_~x~0) 4294967296))))) (<= 0 ULTIMATE.start_main_~x~0)) [2019-12-07 21:24:18,601 INFO L246 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2019-12-07 21:24:18,601 INFO L246 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2019-12-07 21:24:18,601 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 21:24:18,601 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-12-07 21:24:18,602 INFO L246 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-12-07 21:24:18,602 INFO L249 CegarLoopResult]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2019-12-07 21:24:18,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 09:24:18 BoogieIcfgContainer [2019-12-07 21:24:18,612 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 21:24:18,612 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 21:24:18,612 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 21:24:18,613 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 21:24:18,613 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:24:16" (3/4) ... [2019-12-07 21:24:18,615 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 21:24:18,621 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 21:24:18,621 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 21:24:18,621 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 21:24:18,645 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_dbc214a6-9ca9-40ce-aa34-dee3aa55b696/bin/utaipan/witness.graphml [2019-12-07 21:24:18,645 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 21:24:18,647 INFO L168 Benchmark]: Toolchain (without parser) took 2744.87 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 93.3 MB). Free memory was 940.8 MB in the beginning and 1.0 GB in the end (delta: -91.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. [2019-12-07 21:24:18,647 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 955.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:24:18,647 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.19 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 93.3 MB). Free memory was 940.8 MB in the beginning and 1.1 GB in the end (delta: -150.2 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-12-07 21:24:18,648 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.62 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 21:24:18,648 INFO L168 Benchmark]: Boogie Preprocessor took 12.19 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 21:24:18,648 INFO L168 Benchmark]: RCFGBuilder took 134.85 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. [2019-12-07 21:24:18,649 INFO L168 Benchmark]: TraceAbstraction took 2363.78 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 33.3 MB). Peak memory consumption was 33.3 MB. Max. memory is 11.5 GB. [2019-12-07 21:24:18,649 INFO L168 Benchmark]: Witness Printer took 33.19 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 21:24:18,651 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 955.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 178.19 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 93.3 MB). Free memory was 940.8 MB in the beginning and 1.1 GB in the end (delta: -150.2 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.62 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 12.19 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 134.85 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2363.78 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 33.3 MB). Peak memory consumption was 33.3 MB. Max. memory is 11.5 GB. * Witness Printer took 33.19 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: x <= 2 * (x / 2) + 4294967296 * ((x / 2 * -2 + x) / 4294967296) && 0 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Result: SAFE, OverallTime: 2.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 1 SDslu, 3 SDs, 0 SdLazy, 3 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 3 NumberOfFragments, 24 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 386 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...