./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/loop-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/loop-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 960d0951826ec789f14046fc413d6b8700d39528 ................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/loop-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 960d0951826ec789f14046fc413d6b8700d39528 ............................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 07:43:25,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 07:43:25,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 07:43:25,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 07:43:25,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 07:43:25,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 07:43:25,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 07:43:25,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 07:43:25,932 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 07:43:25,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 07:43:25,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 07:43:25,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 07:43:25,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 07:43:25,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 07:43:25,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 07:43:25,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 07:43:25,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 07:43:25,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 07:43:25,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 07:43:25,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 07:43:25,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 07:43:25,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 07:43:25,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 07:43:25,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 07:43:25,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 07:43:25,950 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 07:43:25,951 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 07:43:25,951 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 07:43:25,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 07:43:25,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 07:43:25,953 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 07:43:25,954 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 07:43:25,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 07:43:25,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 07:43:25,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 07:43:25,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 07:43:25,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 07:43:25,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 07:43:25,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 07:43:25,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 07:43:25,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 07:43:25,958 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 07:43:25,975 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 07:43:25,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 07:43:25,976 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 07:43:25,976 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 07:43:25,977 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 07:43:25,983 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 07:43:25,983 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 07:43:25,984 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 07:43:25,984 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 07:43:25,984 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 07:43:25,984 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 07:43:25,984 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 07:43:25,984 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 07:43:25,984 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 07:43:25,984 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 07:43:25,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 07:43:25,985 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 07:43:25,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 07:43:25,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 07:43:25,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 07:43:25,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 07:43:25,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 07:43:25,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 07:43:25,986 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 07:43:25,986 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 07:43:25,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 07:43:25,986 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 07:43:25,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 07:43:25,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 07:43:25,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 07:43:25,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:43:25,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 07:43:25,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 07:43:25,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 07:43:25,987 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 07:43:25,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 07:43:25,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 07:43:25,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 07:43:25,987 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 07:43:25,988 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 960d0951826ec789f14046fc413d6b8700d39528 [2020-12-09 07:43:26,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 07:43:26,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 07:43:26,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 07:43:26,197 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 07:43:26,197 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 07:43:26,198 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/../../sv-benchmarks/c/float-benchs/loop-1.c [2020-12-09 07:43:26,240 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/data/4d3d73589/cac09c569f29445abe3a88be651989ab/FLAG26dcd2ee8 [2020-12-09 07:43:26,610 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 07:43:26,610 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/sv-benchmarks/c/float-benchs/loop-1.c [2020-12-09 07:43:26,614 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/data/4d3d73589/cac09c569f29445abe3a88be651989ab/FLAG26dcd2ee8 [2020-12-09 07:43:26,623 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/data/4d3d73589/cac09c569f29445abe3a88be651989ab [2020-12-09 07:43:26,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 07:43:26,626 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 07:43:26,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 07:43:26,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 07:43:26,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 07:43:26,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:43:26" (1/1) ... [2020-12-09 07:43:26,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b3673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:26, skipping insertion in model container [2020-12-09 07:43:26,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:43:26" (1/1) ... [2020-12-09 07:43:26,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 07:43:26,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 07:43:26,732 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/sv-benchmarks/c/float-benchs/loop-1.c[311,324] [2020-12-09 07:43:26,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:43:26,752 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 07:43:26,763 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/sv-benchmarks/c/float-benchs/loop-1.c[311,324] [2020-12-09 07:43:26,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:43:26,779 INFO L208 MainTranslator]: Completed translation [2020-12-09 07:43:26,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:26 WrapperNode [2020-12-09 07:43:26,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 07:43:26,780 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 07:43:26,781 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 07:43:26,781 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 07:43:26,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:26" (1/1) ... [2020-12-09 07:43:26,794 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:26" (1/1) ... [2020-12-09 07:43:26,809 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 07:43:26,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 07:43:26,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 07:43:26,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 07:43:26,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:26" (1/1) ... [2020-12-09 07:43:26,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:26" (1/1) ... [2020-12-09 07:43:26,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:26" (1/1) ... [2020-12-09 07:43:26,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:26" (1/1) ... [2020-12-09 07:43:26,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:26" (1/1) ... [2020-12-09 07:43:26,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:26" (1/1) ... [2020-12-09 07:43:26,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:26" (1/1) ... [2020-12-09 07:43:26,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 07:43:26,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 07:43:26,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 07:43:26,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 07:43:26,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/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 [2020-12-09 07:43:26,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 07:43:26,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 07:43:26,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 07:43:26,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 07:43:27,026 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 07:43:27,026 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 07:43:27,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:43:27 BoogieIcfgContainer [2020-12-09 07:43:27,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 07:43:27,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 07:43:27,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 07:43:27,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 07:43:27,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:43:26" (1/3) ... [2020-12-09 07:43:27,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab66bd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:43:27, skipping insertion in model container [2020-12-09 07:43:27,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:26" (2/3) ... [2020-12-09 07:43:27,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab66bd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:43:27, skipping insertion in model container [2020-12-09 07:43:27,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:43:27" (3/3) ... [2020-12-09 07:43:27,034 INFO L111 eAbstractionObserver]: Analyzing ICFG loop-1.c [2020-12-09 07:43:27,044 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 07:43:27,047 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 07:43:27,054 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 07:43:27,070 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 07:43:27,071 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 07:43:27,071 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 07:43:27,071 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 07:43:27,071 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 07:43:27,071 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 07:43:27,071 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 07:43:27,071 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 07:43:27,090 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-12-09 07:43:27,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 07:43:27,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:43:27,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 07:43:27,094 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:43:27,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:43:27,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1850503, now seen corresponding path program 1 times [2020-12-09 07:43:27,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:43:27,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914953088] [2020-12-09 07:43:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:43:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:43:27,201 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:43:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:43:27,220 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:43:27,235 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 07:43:27,235 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 07:43:27,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 07:43:27,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:43:27 BoogieIcfgContainer [2020-12-09 07:43:27,251 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 07:43:27,251 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 07:43:27,251 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 07:43:27,252 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 07:43:27,252 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:43:27" (3/4) ... [2020-12-09 07:43:27,254 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 07:43:27,254 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 07:43:27,256 INFO L168 Benchmark]: Toolchain (without parser) took 629.07 ms. Allocated memory was 86.0 MB in the beginning and 130.0 MB in the end (delta: 44.0 MB). Free memory was 64.5 MB in the beginning and 101.8 MB in the end (delta: -37.3 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. [2020-12-09 07:43:27,257 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 86.0 MB. Free memory was 60.6 MB in the beginning and 60.6 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:43:27,258 INFO L168 Benchmark]: CACSL2BoogieTranslator took 153.03 ms. Allocated memory is still 86.0 MB. Free memory was 64.3 MB in the beginning and 55.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 07:43:27,259 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.42 ms. Allocated memory is still 86.0 MB. Free memory was 55.0 MB in the beginning and 53.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:43:27,259 INFO L168 Benchmark]: Boogie Preprocessor took 19.29 ms. Allocated memory is still 86.0 MB. Free memory was 53.6 MB in the beginning and 52.6 MB in the end (delta: 950.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:43:27,260 INFO L168 Benchmark]: RCFGBuilder took 198.43 ms. Allocated memory is still 86.0 MB. Free memory was 52.6 MB in the beginning and 39.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 07:43:27,261 INFO L168 Benchmark]: TraceAbstraction took 221.66 ms. Allocated memory was 86.0 MB in the beginning and 130.0 MB in the end (delta: 44.0 MB). Free memory was 39.0 MB in the beginning and 102.4 MB in the end (delta: -63.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:43:27,261 INFO L168 Benchmark]: Witness Printer took 3.18 ms. Allocated memory is still 130.0 MB. Free memory is still 101.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:43:27,264 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 86.0 MB. Free memory was 60.6 MB in the beginning and 60.6 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 153.03 ms. Allocated memory is still 86.0 MB. Free memory was 64.3 MB in the beginning and 55.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.42 ms. Allocated memory is still 86.0 MB. Free memory was 55.0 MB in the beginning and 53.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.29 ms. Allocated memory is still 86.0 MB. Free memory was 53.6 MB in the beginning and 52.6 MB in the end (delta: 950.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 198.43 ms. Allocated memory is still 86.0 MB. Free memory was 52.6 MB in the beginning and 39.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 221.66 ms. Allocated memory was 86.0 MB in the beginning and 130.0 MB in the end (delta: 44.0 MB). Free memory was 39.0 MB in the beginning and 102.4 MB in the end (delta: -63.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 3.18 ms. Allocated memory is still 130.0 MB. Free memory is still 101.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 4]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 14, overapproximation of someBinaryDOUBLEComparisonOperation at line 20. Possible FailurePath: [L8] float x, y, z; [L10] x = 1.f [L11] y = 1e7 [L12] z = 42.f [L14] COND FALSE !(x < y) [L4] COND TRUE !(cond) [L4] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 07:43:28,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 07:43:28,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 07:43:28,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 07:43:28,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 07:43:28,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 07:43:28,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 07:43:28,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 07:43:28,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 07:43:28,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 07:43:28,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 07:43:28,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 07:43:28,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 07:43:28,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 07:43:28,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 07:43:28,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 07:43:28,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 07:43:28,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 07:43:28,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 07:43:28,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 07:43:28,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 07:43:28,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 07:43:28,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 07:43:28,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 07:43:28,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 07:43:28,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 07:43:28,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 07:43:28,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 07:43:28,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 07:43:28,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 07:43:28,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 07:43:28,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 07:43:28,843 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 07:43:28,844 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 07:43:28,845 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 07:43:28,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 07:43:28,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 07:43:28,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 07:43:28,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 07:43:28,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 07:43:28,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 07:43:28,848 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 07:43:28,874 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 07:43:28,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 07:43:28,875 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 07:43:28,876 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 07:43:28,876 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 07:43:28,876 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 07:43:28,876 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 07:43:28,876 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 07:43:28,877 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 07:43:28,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 07:43:28,877 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 07:43:28,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 07:43:28,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 07:43:28,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 07:43:28,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 07:43:28,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 07:43:28,879 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 07:43:28,879 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 07:43:28,879 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 07:43:28,879 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 07:43:28,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 07:43:28,880 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 07:43:28,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 07:43:28,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 07:43:28,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 07:43:28,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 07:43:28,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:43:28,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 07:43:28,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 07:43:28,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 07:43:28,881 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 07:43:28,882 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 07:43:28,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 07:43:28,882 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 07:43:28,882 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 07:43:28,882 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 960d0951826ec789f14046fc413d6b8700d39528 [2020-12-09 07:43:29,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 07:43:29,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 07:43:29,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 07:43:29,143 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 07:43:29,143 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 07:43:29,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/../../sv-benchmarks/c/float-benchs/loop-1.c [2020-12-09 07:43:29,185 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/data/41f9f5d57/2d6cbf74d9034325a9a5c87a3b07e4d4/FLAG267ad655b [2020-12-09 07:43:29,579 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 07:43:29,580 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/sv-benchmarks/c/float-benchs/loop-1.c [2020-12-09 07:43:29,584 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/data/41f9f5d57/2d6cbf74d9034325a9a5c87a3b07e4d4/FLAG267ad655b [2020-12-09 07:43:29,593 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/data/41f9f5d57/2d6cbf74d9034325a9a5c87a3b07e4d4 [2020-12-09 07:43:29,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 07:43:29,596 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 07:43:29,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 07:43:29,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 07:43:29,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 07:43:29,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:43:29" (1/1) ... [2020-12-09 07:43:29,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6961760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:29, skipping insertion in model container [2020-12-09 07:43:29,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:43:29" (1/1) ... [2020-12-09 07:43:29,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 07:43:29,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 07:43:29,720 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/sv-benchmarks/c/float-benchs/loop-1.c[311,324] [2020-12-09 07:43:29,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:43:29,744 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 07:43:29,752 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/sv-benchmarks/c/float-benchs/loop-1.c[311,324] [2020-12-09 07:43:29,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:43:29,767 INFO L208 MainTranslator]: Completed translation [2020-12-09 07:43:29,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:29 WrapperNode [2020-12-09 07:43:29,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 07:43:29,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 07:43:29,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 07:43:29,769 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 07:43:29,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:29" (1/1) ... [2020-12-09 07:43:29,781 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:29" (1/1) ... [2020-12-09 07:43:29,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 07:43:29,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 07:43:29,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 07:43:29,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 07:43:29,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:29" (1/1) ... [2020-12-09 07:43:29,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:29" (1/1) ... [2020-12-09 07:43:29,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:29" (1/1) ... [2020-12-09 07:43:29,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:29" (1/1) ... [2020-12-09 07:43:29,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:29" (1/1) ... [2020-12-09 07:43:29,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:29" (1/1) ... [2020-12-09 07:43:29,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:29" (1/1) ... [2020-12-09 07:43:29,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 07:43:29,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 07:43:29,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 07:43:29,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 07:43:29,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/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 [2020-12-09 07:43:29,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 07:43:29,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 07:43:29,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 07:43:29,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 07:43:30,617 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 07:43:30,617 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 07:43:30,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:43:30 BoogieIcfgContainer [2020-12-09 07:43:30,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 07:43:30,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 07:43:30,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 07:43:30,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 07:43:30,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:43:29" (1/3) ... [2020-12-09 07:43:30,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22b5f416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:43:30, skipping insertion in model container [2020-12-09 07:43:30,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:43:29" (2/3) ... [2020-12-09 07:43:30,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22b5f416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:43:30, skipping insertion in model container [2020-12-09 07:43:30,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:43:30" (3/3) ... [2020-12-09 07:43:30,625 INFO L111 eAbstractionObserver]: Analyzing ICFG loop-1.c [2020-12-09 07:43:30,637 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 07:43:30,639 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 07:43:30,645 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 07:43:30,661 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 07:43:30,661 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 07:43:30,661 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 07:43:30,661 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 07:43:30,661 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 07:43:30,661 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 07:43:30,661 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 07:43:30,661 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 07:43:30,669 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-09 07:43:30,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 07:43:30,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:43:30,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 07:43:30,673 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:43:30,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:43:30,678 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2020-12-09 07:43:30,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:43:30,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352504266] [2020-12-09 07:43:30,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 07:43:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:43:30,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 07:43:30,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:43:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:43:30,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:43:30,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352504266] [2020-12-09 07:43:30,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:43:30,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 07:43:30,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901900473] [2020-12-09 07:43:30,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 07:43:30,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:43:30,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 07:43:30,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 07:43:30,810 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-12-09 07:43:31,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:43:31,134 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2020-12-09 07:43:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 07:43:31,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 07:43:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:43:31,141 INFO L225 Difference]: With dead ends: 20 [2020-12-09 07:43:31,141 INFO L226 Difference]: Without dead ends: 8 [2020-12-09 07:43:31,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 07:43:31,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-09 07:43:31,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-09 07:43:31,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-09 07:43:31,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-09 07:43:31,162 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-09 07:43:31,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:43:31,162 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-09 07:43:31,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 07:43:31,162 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-09 07:43:31,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 07:43:31,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:43:31,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:43:31,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 07:43:31,365 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:43:31,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:43:31,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2020-12-09 07:43:31,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:43:31,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423381049] [2020-12-09 07:43:31,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 07:43:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:43:31,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 07:43:31,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:43:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:43:31,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:43:35,659 WARN L197 SmtUtils]: Spent 614.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-12-09 07:43:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:43:35,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423381049] [2020-12-09 07:43:35,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1315754397] [2020-12-09 07:43:35,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt [2020-12-09 07:43:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:43:35,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 07:43:35,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:43:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:43:35,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:43:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:43:35,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628588474] [2020-12-09 07:43:35,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:43:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:43:36,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 07:43:36,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:43:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:43:37,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:43:39,205 WARN L197 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-12-09 07:43:47,605 WARN L197 SmtUtils]: Spent 1.99 s on a formula simplification that was a NOOP. DAG size: 12 [2020-12-09 07:43:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:43:47,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 07:43:47,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 14 [2020-12-09 07:43:47,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213870044] [2020-12-09 07:43:47,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-09 07:43:47,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:43:47,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-09 07:43:47,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=141, Unknown=1, NotChecked=0, Total=182 [2020-12-09 07:43:47,622 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 14 states. [2020-12-09 07:44:46,802 WARN L197 SmtUtils]: Spent 39.46 s on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2020-12-09 07:45:06,473 WARN L197 SmtUtils]: Spent 7.87 s on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2020-12-09 07:45:33,578 WARN L197 SmtUtils]: Spent 13.09 s on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2020-12-09 07:45:47,468 WARN L197 SmtUtils]: Spent 3.61 s on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2020-12-09 07:45:47,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:45:47,469 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2020-12-09 07:45:47,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 07:45:47,469 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2020-12-09 07:45:47,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:45:47,470 INFO L225 Difference]: With dead ends: 13 [2020-12-09 07:45:47,470 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 07:45:47,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 119.8s TimeCoverageRelationStatistics Valid=95, Invalid=281, Unknown=4, NotChecked=0, Total=380 [2020-12-09 07:45:47,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 07:45:47,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 07:45:47,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 07:45:47,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 07:45:47,471 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2020-12-09 07:45:47,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:45:47,472 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 07:45:47,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-09 07:45:47,472 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 07:45:47,472 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 07:45:48,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3,4 cvc4 --incremental --print-success --lang smt,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:45:48,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 07:46:12,063 WARN L197 SmtUtils]: Spent 23.94 s on a formula simplification. DAG size of input: 42 DAG size of output: 11 [2020-12-09 07:46:12,065 INFO L265 CegarLoopResult]: At program point L4-3(line 4) the Hoare annotation is: true [2020-12-09 07:46:12,065 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 07:46:12,065 INFO L265 CegarLoopResult]: At program point L21(lines 6 22) the Hoare annotation is: true [2020-12-09 07:46:12,065 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-09 07:46:12,065 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 07:46:12,065 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-09 07:46:12,065 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-12-09 07:46:12,065 INFO L258 CegarLoopResult]: At program point L14-2(lines 14 18) the Hoare annotation is: (and (= currentRoundingMode roundNearestTiesToEven) (fp.leq ((_ to_fp 11 53) currentRoundingMode ULTIMATE.start_main_~z~0) ((_ to_fp 11 53) currentRoundingMode 100000000.0)) (fp.geq ULTIMATE.start_main_~z~0 (_ +zero 8 24))) [2020-12-09 07:46:12,066 INFO L262 CegarLoopResult]: For program point L14-3(lines 14 18) no Hoare annotation was computed. [2020-12-09 07:46:12,066 INFO L262 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-12-09 07:46:12,066 INFO L262 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-12-09 07:46:12,072 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2020-12-09 07:46:12,074 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2020-12-09 07:46:12,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:46:12 BoogieIcfgContainer [2020-12-09 07:46:12,076 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 07:46:12,076 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 07:46:12,076 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 07:46:12,076 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 07:46:12,077 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:43:30" (3/4) ... [2020-12-09 07:46:12,079 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 07:46:12,085 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-09 07:46:12,085 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 07:46:12,085 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 07:46:12,085 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 07:46:12,107 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_11e267b3-f1d7-4818-a55a-e5241bd1b450/bin/utaipan/witness.graphml [2020-12-09 07:46:12,107 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 07:46:12,108 INFO L168 Benchmark]: Toolchain (without parser) took 162510.93 ms. Allocated memory was 50.3 MB in the beginning and 62.9 MB in the end (delta: 12.6 MB). Free memory was 27.9 MB in the beginning and 28.5 MB in the end (delta: -612.6 kB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:46:12,108 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 50.3 MB. Free memory was 32.8 MB in the beginning and 32.7 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:46:12,108 INFO L168 Benchmark]: CACSL2BoogieTranslator took 170.59 ms. Allocated memory is still 50.3 MB. Free memory was 27.8 MB in the beginning and 29.5 MB in the end (delta: -1.7 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2020-12-09 07:46:12,109 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.15 ms. Allocated memory was 50.3 MB in the beginning and 62.9 MB in the end (delta: 12.6 MB). Free memory was 29.5 MB in the beginning and 47.1 MB in the end (delta: -17.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 07:46:12,109 INFO L168 Benchmark]: Boogie Preprocessor took 22.84 ms. Allocated memory is still 62.9 MB. Free memory was 47.1 MB in the beginning and 46.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:46:12,110 INFO L168 Benchmark]: RCFGBuilder took 790.15 ms. Allocated memory is still 62.9 MB. Free memory was 45.9 MB in the beginning and 34.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 07:46:12,110 INFO L168 Benchmark]: TraceAbstraction took 161456.50 ms. Allocated memory is still 62.9 MB. Free memory was 34.0 MB in the beginning and 31.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2020-12-09 07:46:12,110 INFO L168 Benchmark]: Witness Printer took 30.59 ms. Allocated memory is still 62.9 MB. Free memory was 31.0 MB in the beginning and 28.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:46:12,113 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 50.3 MB. Free memory was 32.8 MB in the beginning and 32.7 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 170.59 ms. Allocated memory is still 50.3 MB. Free memory was 27.8 MB in the beginning and 29.5 MB in the end (delta: -1.7 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.15 ms. Allocated memory was 50.3 MB in the beginning and 62.9 MB in the end (delta: 12.6 MB). Free memory was 29.5 MB in the beginning and 47.1 MB in the end (delta: -17.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.84 ms. Allocated memory is still 62.9 MB. Free memory was 47.1 MB in the beginning and 46.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 790.15 ms. Allocated memory is still 62.9 MB. Free memory was 45.9 MB in the beginning and 34.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 161456.50 ms. Allocated memory is still 62.9 MB. Free memory was 34.0 MB in the beginning and 31.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. * Witness Printer took 30.59 ms. Allocated memory is still 62.9 MB. Free memory was 31.0 MB in the beginning and 28.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 4]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 14]: Loop Invariant [2020-12-09 07:46:12,117 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2020-12-09 07:46:12,118 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven Derived loop invariant: (unknown-currentRoundingMode-unknown == ~roundNearestTiesToEven && ~fp.leq~DOUBLE(~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, z), ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, 1.0E8))) && ~fp.geq~FLOAT(z, ~Pluszero~LONGDOUBLE()) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 137.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 120.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 23.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 6 SDslu, 16 SDs, 0 SdLazy, 37 SolverSat, 14 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 15.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 119.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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, 3 LocationsWithAnnotation, 3 PreInvPairs, 9 NumberOfFragments, 16 HoareAnnotationTreeSize, 3 FomulaSimplifications, 42 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 94 FormulaSimplificationTreeSizeReductionInter, 23.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 15.6s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 41 ConstructedInterpolants, 1 QuantifiedInterpolants, 1410 SizeOfPredicates, 15 NumberOfNonLiveVariables, 132 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...