./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_1-1.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_281ee0c4-2b38-4b06-bd43-3174ee013599/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_281ee0c4-2b38-4b06-bd43-3174ee013599/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_281ee0c4-2b38-4b06-bd43-3174ee013599/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_281ee0c4-2b38-4b06-bd43-3174ee013599/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_1-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_281ee0c4-2b38-4b06-bd43-3174ee013599/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_281ee0c4-2b38-4b06-bd43-3174ee013599/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 39d1cf9c8579a9e3ab0612befbfddbea31e87fbe .......................................................................................................................................................................................................................................................................................................................................................................................................... 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 03:01:55,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 03:01:55,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 03:01:55,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 03:01:55,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 03:01:55,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 03:01:55,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 03:01:55,959 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 03:01:55,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 03:01:55,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 03:01:55,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 03:01:55,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 03:01:55,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 03:01:55,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 03:01:55,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 03:01:55,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 03:01:55,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 03:01:55,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 03:01:55,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 03:01:55,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 03:01:55,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 03:01:55,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 03:01:55,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 03:01:55,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 03:01:55,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 03:01:55,993 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 03:01:55,994 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 03:01:55,995 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 03:01:55,995 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 03:01:55,996 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 03:01:55,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 03:01:55,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 03:01:55,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 03:01:55,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 03:01:55,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 03:01:56,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 03:01:56,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 03:01:56,000 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 03:01:56,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 03:01:56,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 03:01:56,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 03:01:56,003 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_281ee0c4-2b38-4b06-bd43-3174ee013599/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 03:01:56,028 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 03:01:56,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 03:01:56,039 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 03:01:56,039 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 03:01:56,039 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 03:01:56,039 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 03:01:56,039 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 03:01:56,039 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 03:01:56,039 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 03:01:56,040 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 03:01:56,040 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 03:01:56,040 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 03:01:56,040 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 03:01:56,040 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 03:01:56,040 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 03:01:56,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 03:01:56,041 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 03:01:56,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 03:01:56,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 03:01:56,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 03:01:56,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 03:01:56,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 03:01:56,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 03:01:56,041 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 03:01:56,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 03:01:56,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 03:01:56,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 03:01:56,042 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 03:01:56,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 03:01:56,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 03:01:56,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 03:01:56,043 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 03:01:56,043 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 03:01:56,043 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 03:01:56,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 03:01:56,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 03:01:56,043 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 03:01:56,043 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_281ee0c4-2b38-4b06-bd43-3174ee013599/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 -> 39d1cf9c8579a9e3ab0612befbfddbea31e87fbe [2019-11-26 03:01:56,175 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 03:01:56,189 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 03:01:56,191 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 03:01:56,192 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 03:01:56,193 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 03:01:56,193 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_281ee0c4-2b38-4b06-bd43-3174ee013599/bin/utaipan/../../sv-benchmarks/c/loop-acceleration/underapprox_1-1.c [2019-11-26 03:01:56,242 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_281ee0c4-2b38-4b06-bd43-3174ee013599/bin/utaipan/data/342e7136d/dcff8387ffc04531b948e669298ba91c/FLAG9fc51e3da [2019-11-26 03:01:56,633 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 03:01:56,634 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_281ee0c4-2b38-4b06-bd43-3174ee013599/sv-benchmarks/c/loop-acceleration/underapprox_1-1.c [2019-11-26 03:01:56,639 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_281ee0c4-2b38-4b06-bd43-3174ee013599/bin/utaipan/data/342e7136d/dcff8387ffc04531b948e669298ba91c/FLAG9fc51e3da [2019-11-26 03:01:57,025 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_281ee0c4-2b38-4b06-bd43-3174ee013599/bin/utaipan/data/342e7136d/dcff8387ffc04531b948e669298ba91c [2019-11-26 03:01:57,027 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 03:01:57,028 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 03:01:57,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 03:01:57,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 03:01:57,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 03:01:57,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 03:01:57" (1/1) ... [2019-11-26 03:01:57,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b33eedf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:57, skipping insertion in model container [2019-11-26 03:01:57,036 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 03:01:57" (1/1) ... [2019-11-26 03:01:57,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 03:01:57,056 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 03:01:57,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 03:01:57,194 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 03:01:57,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 03:01:57,289 INFO L205 MainTranslator]: Completed translation [2019-11-26 03:01:57,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:57 WrapperNode [2019-11-26 03:01:57,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 03:01:57,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 03:01:57,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 03:01:57,290 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 03:01:57,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:57" (1/1) ... [2019-11-26 03:01:57,304 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:57" (1/1) ... [2019-11-26 03:01:57,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 03:01:57,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 03:01:57,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 03:01:57,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 03:01:57,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:57" (1/1) ... [2019-11-26 03:01:57,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:57" (1/1) ... [2019-11-26 03:01:57,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:57" (1/1) ... [2019-11-26 03:01:57,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:57" (1/1) ... [2019-11-26 03:01:57,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:57" (1/1) ... [2019-11-26 03:01:57,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:57" (1/1) ... [2019-11-26 03:01:57,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:57" (1/1) ... [2019-11-26 03:01:57,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 03:01:57,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 03:01:57,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 03:01:57,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 03:01:57,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_281ee0c4-2b38-4b06-bd43-3174ee013599/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 03:01:57,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 03:01:57,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 03:01:57,583 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 03:01:57,584 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-26 03:01:57,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 03:01:57 BoogieIcfgContainer [2019-11-26 03:01:57,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 03:01:57,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 03:01:57,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 03:01:57,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 03:01:57,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 03:01:57" (1/3) ... [2019-11-26 03:01:57,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6901d7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 03:01:57, skipping insertion in model container [2019-11-26 03:01:57,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:57" (2/3) ... [2019-11-26 03:01:57,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6901d7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 03:01:57, skipping insertion in model container [2019-11-26 03:01:57,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 03:01:57" (3/3) ... [2019-11-26 03:01:57,592 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2019-11-26 03:01:57,600 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 03:01:57,605 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 03:01:57,614 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 03:01:57,635 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 03:01:57,635 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 03:01:57,636 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 03:01:57,636 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 03:01:57,636 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 03:01:57,636 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 03:01:57,637 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 03:01:57,637 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 03:01:57,649 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-11-26 03:01:57,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-26 03:01:57,654 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:01:57,655 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-26 03:01:57,655 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 03:01:57,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:01:57,661 INFO L82 PathProgramCache]: Analyzing trace with hash 982688, now seen corresponding path program 1 times [2019-11-26 03:01:57,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 03:01:57,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213649623] [2019-11-26 03:01:57,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 03:01:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:01:57,840 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 03:01:57,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213649623] [2019-11-26 03:01:57,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 03:01:57,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-26 03:01:57,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066227713] [2019-11-26 03:01:57,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 03:01:57,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 03:01:57,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 03:01:57,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 03:01:57,862 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2019-11-26 03:01:57,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:01:57,917 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2019-11-26 03:01:57,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 03:01:57,919 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-11-26 03:01:57,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:01:57,927 INFO L225 Difference]: With dead ends: 13 [2019-11-26 03:01:57,927 INFO L226 Difference]: Without dead ends: 6 [2019-11-26 03:01:57,930 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 03:01:57,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-11-26 03:01:57,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-11-26 03:01:57,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-26 03:01:57,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-11-26 03:01:57,992 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-11-26 03:01:57,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:01:57,993 INFO L462 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-11-26 03:01:57,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 03:01:57,993 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-11-26 03:01:57,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-26 03:01:57,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:01:57,994 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-26 03:01:57,994 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 03:01:57,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:01:57,995 INFO L82 PathProgramCache]: Analyzing trace with hash 29879958, now seen corresponding path program 1 times [2019-11-26 03:01:57,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 03:01:58,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421685909] [2019-11-26 03:01:58,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 03:01:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:01:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:01:58,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421685909] [2019-11-26 03:01:58,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197934678] [2019-11-26 03:01:58,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_281ee0c4-2b38-4b06-bd43-3174ee013599/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 03:01:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:01:58,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 03:01:58,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:01:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:01:58,155 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:01:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:01:58,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2146661318] [2019-11-26 03:01:58,202 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-11-26 03:01:58,203 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 03:01:58,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 03:01:58,214 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 03:01:58,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 03:01:58,344 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 03:01:58,412 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 03:01:58,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-26 03:01:58,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2019-11-26 03:01:58,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406868341] [2019-11-26 03:01:58,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 03:01:58,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 03:01:58,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 03:01:58,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-26 03:01:58,415 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 7 states. [2019-11-26 03:01:58,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:01:58,471 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2019-11-26 03:01:58,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 03:01:58,472 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 5 [2019-11-26 03:01:58,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:01:58,473 INFO L225 Difference]: With dead ends: 12 [2019-11-26 03:01:58,473 INFO L226 Difference]: Without dead ends: 9 [2019-11-26 03:01:58,474 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-26 03:01:58,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-26 03:01:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-26 03:01:58,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-26 03:01:58,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-26 03:01:58,477 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2019-11-26 03:01:58,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:01:58,477 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-26 03:01:58,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 03:01:58,477 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-26 03:01:58,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 03:01:58,478 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:01:58,478 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2019-11-26 03:01:58,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 03:01:58,684 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 03:01:58,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:01:58,684 INFO L82 PathProgramCache]: Analyzing trace with hash 516312096, now seen corresponding path program 2 times [2019-11-26 03:01:58,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 03:01:58,685 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68074845] [2019-11-26 03:01:58,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 03:01:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:01:58,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:01:58,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68074845] [2019-11-26 03:01:58,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914463434] [2019-11-26 03:01:58,818 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_281ee0c4-2b38-4b06-bd43-3174ee013599/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 [2019-11-26 03:01:58,847 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-26 03:01:58,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 03:01:58,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-26 03:01:58,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:01:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:01:58,888 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:01:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:01:58,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1689054314] [2019-11-26 03:01:58,994 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-11-26 03:01:58,994 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 03:01:58,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 03:01:58,995 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 03:01:58,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 03:01:59,054 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 03:01:59,164 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 03:01:59,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-26 03:01:59,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2019-11-26 03:01:59,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839853519] [2019-11-26 03:01:59,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-26 03:01:59,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 03:01:59,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-26 03:01:59,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2019-11-26 03:01:59,167 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 13 states. [2019-11-26 03:01:59,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:01:59,225 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2019-11-26 03:01:59,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 03:01:59,227 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 8 [2019-11-26 03:01:59,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:01:59,227 INFO L225 Difference]: With dead ends: 14 [2019-11-26 03:01:59,227 INFO L226 Difference]: Without dead ends: 11 [2019-11-26 03:01:59,228 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2019-11-26 03:01:59,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-26 03:01:59,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-26 03:01:59,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-26 03:01:59,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-11-26 03:01:59,231 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2019-11-26 03:01:59,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:01:59,231 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-11-26 03:01:59,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-26 03:01:59,232 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-11-26 03:01:59,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-26 03:01:59,232 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:01:59,232 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2019-11-26 03:01:59,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 03:01:59,436 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 03:01:59,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:01:59,436 INFO L82 PathProgramCache]: Analyzing trace with hash -2058949920, now seen corresponding path program 3 times [2019-11-26 03:01:59,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 03:01:59,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577348750] [2019-11-26 03:01:59,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 03:01:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 03:01:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 03:01:59,492 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-26 03:01:59,492 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 03:01:59,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 03:01:59 BoogieIcfgContainer [2019-11-26 03:01:59,505 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 03:01:59,505 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 03:01:59,505 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 03:01:59,505 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 03:01:59,506 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 03:01:57" (3/4) ... [2019-11-26 03:01:59,508 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 03:01:59,561 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_281ee0c4-2b38-4b06-bd43-3174ee013599/bin/utaipan/witness.graphml [2019-11-26 03:01:59,562 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 03:01:59,564 INFO L168 Benchmark]: Toolchain (without parser) took 2534.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 950.1 MB in the beginning and 992.9 MB in the end (delta: -42.8 MB). Peak memory consumption was 93.5 MB. Max. memory is 11.5 GB. [2019-11-26 03:01:59,564 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 03:01:59,565 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -176.0 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-26 03:01:59,565 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.98 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 03:01:59,566 INFO L168 Benchmark]: Boogie Preprocessor took 19.36 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 03:01:59,566 INFO L168 Benchmark]: RCFGBuilder took 243.17 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: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 11.5 GB. [2019-11-26 03:01:59,567 INFO L168 Benchmark]: TraceAbstraction took 1919.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 999.6 MB in the end (delta: 103.7 MB). Peak memory consumption was 103.7 MB. Max. memory is 11.5 GB. [2019-11-26 03:01:59,567 INFO L168 Benchmark]: Witness Printer took 56.85 ms. Allocated memory is still 1.2 GB. Free memory was 999.6 MB in the beginning and 992.9 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-26 03:01:59,570 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 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 260.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -176.0 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.98 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.36 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 243.17 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: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1919.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 999.6 MB in the end (delta: 103.7 MB). Peak memory consumption was 103.7 MB. Max. memory is 11.5 GB. * Witness Printer took 56.85 ms. Allocated memory is still 1.2 GB. Free memory was 999.6 MB in the beginning and 992.9 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 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: [L11] unsigned int x = 0; [L12] unsigned int y = 1; [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND FALSE !(x < 6) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 0 SDslu, 20 SDs, 0 SdLazy, 50 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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, 0.4s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1018 SizeOfPredicates, 2 NumberOfNonLiveVariables, 53 ConjunctsInSsa, 16 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...