./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-cbmc-regression/float3.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_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cbmc-regression/float3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/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 1e66de05904ac2de77ce48b56d6931182ba71ee4 ................................................................................................................................................................................................................................................. 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_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cbmc-regression/float3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/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 1e66de05904ac2de77ce48b56d6931182ba71ee4 .............................................................................................................................................................................................................................................................................................................................. 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 09:06:40,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 09:06:40,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 09:06:40,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 09:06:40,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 09:06:40,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 09:06:40,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 09:06:40,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 09:06:40,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 09:06:40,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 09:06:40,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 09:06:40,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 09:06:40,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 09:06:40,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 09:06:40,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 09:06:40,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 09:06:40,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 09:06:40,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 09:06:40,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 09:06:40,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 09:06:40,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 09:06:40,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 09:06:40,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 09:06:40,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 09:06:40,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 09:06:40,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 09:06:40,466 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 09:06:40,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 09:06:40,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 09:06:40,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 09:06:40,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 09:06:40,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 09:06:40,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 09:06:40,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 09:06:40,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 09:06:40,472 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 09:06:40,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 09:06:40,473 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 09:06:40,473 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 09:06:40,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 09:06:40,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 09:06:40,475 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 09:06:40,496 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 09:06:40,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 09:06:40,497 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 09:06:40,498 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 09:06:40,498 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 09:06:40,498 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 09:06:40,498 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 09:06:40,498 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 09:06:40,498 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 09:06:40,499 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 09:06:40,499 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 09:06:40,499 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 09:06:40,499 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 09:06:40,499 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 09:06:40,500 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 09:06:40,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 09:06:40,500 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 09:06:40,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 09:06:40,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 09:06:40,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 09:06:40,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 09:06:40,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 09:06:40,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 09:06:40,502 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 09:06:40,502 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 09:06:40,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 09:06:40,502 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 09:06:40,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 09:06:40,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 09:06:40,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 09:06:40,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:06:40,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 09:06:40,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 09:06:40,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 09:06:40,504 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 09:06:40,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 09:06:40,504 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 09:06:40,504 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 09:06:40,504 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 09:06:40,505 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_4754fb88-71cf-4f10-8c49-2611fcb979d0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e66de05904ac2de77ce48b56d6931182ba71ee4 [2020-12-09 09:06:40,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 09:06:40,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 09:06:40,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 09:06:40,694 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 09:06:40,694 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 09:06:40,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/../../sv-benchmarks/c/floats-cbmc-regression/float3.c [2020-12-09 09:06:40,741 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/data/d2002778b/6d6491e009094ed99b855cf2a1c0886d/FLAGd234595ca [2020-12-09 09:06:41,113 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 09:06:41,114 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/sv-benchmarks/c/floats-cbmc-regression/float3.c [2020-12-09 09:06:41,118 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/data/d2002778b/6d6491e009094ed99b855cf2a1c0886d/FLAGd234595ca [2020-12-09 09:06:41,525 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/data/d2002778b/6d6491e009094ed99b855cf2a1c0886d [2020-12-09 09:06:41,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 09:06:41,529 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 09:06:41,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 09:06:41,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 09:06:41,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 09:06:41,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:06:41" (1/1) ... [2020-12-09 09:06:41,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bce40e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:41, skipping insertion in model container [2020-12-09 09:06:41,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:06:41" (1/1) ... [2020-12-09 09:06:41,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 09:06:41,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 09:06:41,653 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_4754fb88-71cf-4f10-8c49-2611fcb979d0/sv-benchmarks/c/floats-cbmc-regression/float3.c[465,478] [2020-12-09 09:06:41,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:06:41,663 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 09:06:41,672 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_4754fb88-71cf-4f10-8c49-2611fcb979d0/sv-benchmarks/c/floats-cbmc-regression/float3.c[465,478] [2020-12-09 09:06:41,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:06:41,682 INFO L208 MainTranslator]: Completed translation [2020-12-09 09:06:41,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:41 WrapperNode [2020-12-09 09:06:41,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 09:06:41,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 09:06:41,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 09:06:41,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 09:06:41,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:41" (1/1) ... [2020-12-09 09:06:41,694 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:41" (1/1) ... [2020-12-09 09:06:41,709 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 09:06:41,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 09:06:41,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 09:06:41,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 09:06:41,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:41" (1/1) ... [2020-12-09 09:06:41,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:41" (1/1) ... [2020-12-09 09:06:41,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:41" (1/1) ... [2020-12-09 09:06:41,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:41" (1/1) ... [2020-12-09 09:06:41,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:41" (1/1) ... [2020-12-09 09:06:41,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:41" (1/1) ... [2020-12-09 09:06:41,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:41" (1/1) ... [2020-12-09 09:06:41,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 09:06:41,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 09:06:41,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 09:06:41,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 09:06:41,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/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 09:06:41,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 09:06:41,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 09:06:41,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 09:06:41,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 09:06:41,940 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 09:06:41,940 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-09 09:06:41,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:06:41 BoogieIcfgContainer [2020-12-09 09:06:41,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 09:06:41,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 09:06:41,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 09:06:41,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 09:06:41,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:06:41" (1/3) ... [2020-12-09 09:06:41,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff061e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:06:41, skipping insertion in model container [2020-12-09 09:06:41,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:41" (2/3) ... [2020-12-09 09:06:41,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff061e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:06:41, skipping insertion in model container [2020-12-09 09:06:41,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:06:41" (3/3) ... [2020-12-09 09:06:41,951 INFO L111 eAbstractionObserver]: Analyzing ICFG float3.c [2020-12-09 09:06:41,964 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 09:06:41,967 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 09:06:41,977 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 09:06:41,999 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 09:06:41,999 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 09:06:41,999 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 09:06:42,000 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 09:06:42,000 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 09:06:42,000 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 09:06:42,000 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 09:06:42,000 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 09:06:42,011 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2020-12-09 09:06:42,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 09:06:42,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:06:42,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 09:06:42,017 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:06:42,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:06:42,022 INFO L82 PathProgramCache]: Analyzing trace with hash 56187, now seen corresponding path program 1 times [2020-12-09 09:06:42,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:06:42,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709754179] [2020-12-09 09:06:42,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:06:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:06:42,125 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:06:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:06:42,145 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:06:42,164 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 09:06:42,164 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 09:06:42,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 09:06:42,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:06:42 BoogieIcfgContainer [2020-12-09 09:06:42,183 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 09:06:42,184 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 09:06:42,184 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 09:06:42,184 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 09:06:42,185 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:06:41" (3/4) ... [2020-12-09 09:06:42,188 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 09:06:42,188 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 09:06:42,190 INFO L168 Benchmark]: Toolchain (without parser) took 660.06 ms. Allocated memory is still 121.6 MB. Free memory was 87.9 MB in the beginning and 68.3 MB in the end (delta: 19.6 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:42,191 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 73.4 MB. Free memory is still 33.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:06:42,192 INFO L168 Benchmark]: CACSL2BoogieTranslator took 152.58 ms. Allocated memory is still 121.6 MB. Free memory was 87.9 MB in the beginning and 97.0 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:42,193 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.49 ms. Allocated memory is still 121.6 MB. Free memory was 97.0 MB in the beginning and 96.3 MB in the end (delta: 782.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:06:42,194 INFO L168 Benchmark]: Boogie Preprocessor took 16.84 ms. Allocated memory is still 121.6 MB. Free memory was 96.3 MB in the beginning and 94.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:42,195 INFO L168 Benchmark]: RCFGBuilder took 215.42 ms. Allocated memory is still 121.6 MB. Free memory was 94.9 MB in the beginning and 80.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:42,196 INFO L168 Benchmark]: TraceAbstraction took 238.65 ms. Allocated memory is still 121.6 MB. Free memory was 80.2 MB in the beginning and 68.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:42,196 INFO L168 Benchmark]: Witness Printer took 4.20 ms. Allocated memory is still 121.6 MB. Free memory is still 68.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:06:42,200 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 73.4 MB. Free memory is still 33.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 152.58 ms. Allocated memory is still 121.6 MB. Free memory was 87.9 MB in the beginning and 97.0 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.49 ms. Allocated memory is still 121.6 MB. Free memory was 97.0 MB in the beginning and 96.3 MB in the end (delta: 782.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.84 ms. Allocated memory is still 121.6 MB. Free memory was 96.3 MB in the beginning and 94.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 215.42 ms. Allocated memory is still 121.6 MB. Free memory was 94.9 MB in the beginning and 80.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 238.65 ms. Allocated memory is still 121.6 MB. Free memory was 80.2 MB in the beginning and 68.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.20 ms. Allocated memory is still 121.6 MB. Free memory is still 68.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 26]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 26, overapproximation of someBinaryArithmeticDOUBLEoperation at line 22. Possible FailurePath: [L6] double d = 0.0; [L15] int x = 2; [L17] COND FALSE !(__VERIFIER_nondet_int()) [L10] d = 1.0 [L22] d += (x == 2) [L24] d += (x > 3) [L26] COND TRUE !(d == 2.0) [L26] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 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=6occurred 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, 3 NumberOfCodeBlocks, 3 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 09:06:43,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 09:06:43,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 09:06:43,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 09:06:43,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 09:06:43,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 09:06:43,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 09:06:43,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 09:06:43,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 09:06:43,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 09:06:43,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 09:06:43,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 09:06:43,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 09:06:43,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 09:06:43,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 09:06:43,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 09:06:43,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 09:06:43,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 09:06:43,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 09:06:44,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 09:06:44,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 09:06:44,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 09:06:44,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 09:06:44,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 09:06:44,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 09:06:44,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 09:06:44,010 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 09:06:44,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 09:06:44,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 09:06:44,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 09:06:44,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 09:06:44,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 09:06:44,015 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 09:06:44,016 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 09:06:44,017 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 09:06:44,017 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 09:06:44,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 09:06:44,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 09:06:44,018 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 09:06:44,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 09:06:44,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 09:06:44,020 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 09:06:44,042 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 09:06:44,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 09:06:44,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 09:06:44,043 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 09:06:44,043 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 09:06:44,043 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 09:06:44,043 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 09:06:44,043 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 09:06:44,043 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 09:06:44,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 09:06:44,044 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 09:06:44,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 09:06:44,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 09:06:44,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 09:06:44,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 09:06:44,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 09:06:44,045 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 09:06:44,045 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 09:06:44,045 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 09:06:44,045 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 09:06:44,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 09:06:44,045 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 09:06:44,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 09:06:44,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 09:06:44,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 09:06:44,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 09:06:44,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:06:44,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 09:06:44,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 09:06:44,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 09:06:44,046 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 09:06:44,047 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 09:06:44,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 09:06:44,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 09:06:44,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 09:06:44,047 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_4754fb88-71cf-4f10-8c49-2611fcb979d0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e66de05904ac2de77ce48b56d6931182ba71ee4 [2020-12-09 09:06:44,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 09:06:44,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 09:06:44,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 09:06:44,297 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 09:06:44,298 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 09:06:44,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/../../sv-benchmarks/c/floats-cbmc-regression/float3.c [2020-12-09 09:06:44,339 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/data/747e450ee/94fd4cd0fc0d4d4d8c34a0aa7f8ed96c/FLAGa5f4fa47e [2020-12-09 09:06:44,692 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 09:06:44,692 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/sv-benchmarks/c/floats-cbmc-regression/float3.c [2020-12-09 09:06:44,697 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/data/747e450ee/94fd4cd0fc0d4d4d8c34a0aa7f8ed96c/FLAGa5f4fa47e [2020-12-09 09:06:44,706 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/data/747e450ee/94fd4cd0fc0d4d4d8c34a0aa7f8ed96c [2020-12-09 09:06:44,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 09:06:44,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 09:06:44,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 09:06:44,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 09:06:44,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 09:06:44,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:06:44" (1/1) ... [2020-12-09 09:06:44,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62b64564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:44, skipping insertion in model container [2020-12-09 09:06:44,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:06:44" (1/1) ... [2020-12-09 09:06:44,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 09:06:44,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 09:06:44,827 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_4754fb88-71cf-4f10-8c49-2611fcb979d0/sv-benchmarks/c/floats-cbmc-regression/float3.c[465,478] [2020-12-09 09:06:44,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:06:44,844 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 09:06:44,857 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_4754fb88-71cf-4f10-8c49-2611fcb979d0/sv-benchmarks/c/floats-cbmc-regression/float3.c[465,478] [2020-12-09 09:06:44,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:06:44,873 INFO L208 MainTranslator]: Completed translation [2020-12-09 09:06:44,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:44 WrapperNode [2020-12-09 09:06:44,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 09:06:44,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 09:06:44,875 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 09:06:44,875 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 09:06:44,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:44" (1/1) ... [2020-12-09 09:06:44,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:44" (1/1) ... [2020-12-09 09:06:44,917 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 09:06:44,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 09:06:44,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 09:06:44,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 09:06:44,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:44" (1/1) ... [2020-12-09 09:06:44,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:44" (1/1) ... [2020-12-09 09:06:44,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:44" (1/1) ... [2020-12-09 09:06:44,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:44" (1/1) ... [2020-12-09 09:06:44,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:44" (1/1) ... [2020-12-09 09:06:44,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:44" (1/1) ... [2020-12-09 09:06:44,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:44" (1/1) ... [2020-12-09 09:06:44,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 09:06:44,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 09:06:44,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 09:06:44,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 09:06:44,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/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 09:06:44,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 09:06:45,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 09:06:45,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 09:06:45,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 09:06:46,664 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 09:06:46,664 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-09 09:06:46,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:06:46 BoogieIcfgContainer [2020-12-09 09:06:46,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 09:06:46,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 09:06:46,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 09:06:46,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 09:06:46,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:06:44" (1/3) ... [2020-12-09 09:06:46,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52deeaa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:06:46, skipping insertion in model container [2020-12-09 09:06:46,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:44" (2/3) ... [2020-12-09 09:06:46,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52deeaa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:06:46, skipping insertion in model container [2020-12-09 09:06:46,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:06:46" (3/3) ... [2020-12-09 09:06:46,671 INFO L111 eAbstractionObserver]: Analyzing ICFG float3.c [2020-12-09 09:06:46,680 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 09:06:46,682 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 09:06:46,689 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 09:06:46,705 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 09:06:46,705 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 09:06:46,705 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 09:06:46,705 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 09:06:46,705 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 09:06:46,705 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 09:06:46,705 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 09:06:46,705 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 09:06:46,713 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-09 09:06:46,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 09:06:46,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:06:46,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:06:46,717 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:06:46,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:06:46,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1804965381, now seen corresponding path program 1 times [2020-12-09 09:06:46,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:06:46,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945477480] [2020-12-09 09:06:46,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/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 09:06:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:06:46,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 09:06:46,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:06:47,040 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 09:06:47,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:06:47,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945477480] [2020-12-09 09:06:47,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:06:47,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 09:06:47,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254133327] [2020-12-09 09:06:47,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 09:06:47,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:06:47,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 09:06:47,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 09:06:47,056 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 6 states. [2020-12-09 09:06:49,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:06:49,281 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-09 09:06:49,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 09:06:49,282 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-12-09 09:06:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:06:49,287 INFO L225 Difference]: With dead ends: 22 [2020-12-09 09:06:49,287 INFO L226 Difference]: Without dead ends: 8 [2020-12-09 09:06:49,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 09:06:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-09 09:06:49,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-09 09:06:49,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-09 09:06:49,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-12-09 09:06:49,308 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2020-12-09 09:06:49,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:06:49,308 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-12-09 09:06:49,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 09:06:49,308 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-12-09 09:06:49,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 09:06:49,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:06:49,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:06:49,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 09:06:49,509 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:06:49,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:06:49,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1806812423, now seen corresponding path program 1 times [2020-12-09 09:06:49,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:06:49,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654522016] [2020-12-09 09:06:49,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/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 09:06:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:06:49,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 09:06:49,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:06:49,759 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 09:06:49,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:06:49,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654522016] [2020-12-09 09:06:49,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:06:49,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 09:06:49,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710152993] [2020-12-09 09:06:49,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 09:06:49,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:06:49,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 09:06:49,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 09:06:49,762 INFO L87 Difference]: Start difference. First operand 8 states and 7 transitions. Second operand 6 states. [2020-12-09 09:06:51,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:06:51,949 INFO L93 Difference]: Finished difference Result 8 states and 7 transitions. [2020-12-09 09:06:51,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 09:06:51,965 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-12-09 09:06:51,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:06:51,965 INFO L225 Difference]: With dead ends: 8 [2020-12-09 09:06:51,965 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 09:06:51,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 09:06:51,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 09:06:51,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 09:06:51,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 09:06:51,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 09:06:51,966 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2020-12-09 09:06:51,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:06:51,966 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 09:06:51,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 09:06:51,967 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 09:06:51,967 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 09:06:52,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 09:06:52,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 09:06:52,181 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 09:06:52,181 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-09 09:06:52,182 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 09:06:52,182 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-09 09:06:52,182 INFO L262 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-12-09 09:06:52,183 INFO L262 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed. [2020-12-09 09:06:52,183 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 26) no Hoare annotation was computed. [2020-12-09 09:06:52,184 INFO L262 CegarLoopResult]: For program point L17(lines 17 18) no Hoare annotation was computed. [2020-12-09 09:06:52,184 INFO L262 CegarLoopResult]: For program point L17-2(lines 17 18) no Hoare annotation was computed. [2020-12-09 09:06:52,184 INFO L262 CegarLoopResult]: For program point L13(lines 13 27) no Hoare annotation was computed. [2020-12-09 09:06:52,185 INFO L262 CegarLoopResult]: For program point L8(lines 8 11) no Hoare annotation was computed. [2020-12-09 09:06:52,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:06:52 BoogieIcfgContainer [2020-12-09 09:06:52,196 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 09:06:52,198 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 09:06:52,198 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 09:06:52,198 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 09:06:52,199 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:06:46" (3/4) ... [2020-12-09 09:06:52,204 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 09:06:52,215 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-09 09:06:52,215 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-09 09:06:52,215 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 09:06:52,215 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 09:06:52,237 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4754fb88-71cf-4f10-8c49-2611fcb979d0/bin/utaipan/witness.graphml [2020-12-09 09:06:52,237 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 09:06:52,238 INFO L168 Benchmark]: Toolchain (without parser) took 7528.37 ms. Allocated memory was 52.4 MB in the beginning and 69.2 MB in the end (delta: 16.8 MB). Free memory was 34.2 MB in the beginning and 45.0 MB in the end (delta: -10.8 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:52,239 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 52.4 MB. Free memory is still 34.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:06:52,239 INFO L168 Benchmark]: CACSL2BoogieTranslator took 163.87 ms. Allocated memory is still 52.4 MB. Free memory was 34.0 MB in the beginning and 24.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:52,240 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.43 ms. Allocated memory was 52.4 MB in the beginning and 69.2 MB in the end (delta: 16.8 MB). Free memory was 24.2 MB in the beginning and 54.2 MB in the end (delta: -30.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:52,240 INFO L168 Benchmark]: Boogie Preprocessor took 25.05 ms. Allocated memory is still 69.2 MB. Free memory was 54.2 MB in the beginning and 53.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:52,241 INFO L168 Benchmark]: RCFGBuilder took 1722.02 ms. Allocated memory is still 69.2 MB. Free memory was 52.7 MB in the beginning and 41.6 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:52,241 INFO L168 Benchmark]: TraceAbstraction took 5529.68 ms. Allocated memory is still 69.2 MB. Free memory was 41.2 MB in the beginning and 47.4 MB in the end (delta: -6.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:06:52,241 INFO L168 Benchmark]: Witness Printer took 39.64 ms. Allocated memory is still 69.2 MB. Free memory was 47.4 MB in the beginning and 45.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:52,244 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 52.4 MB. Free memory is still 34.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 163.87 ms. Allocated memory is still 52.4 MB. Free memory was 34.0 MB in the beginning and 24.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.43 ms. Allocated memory was 52.4 MB in the beginning and 69.2 MB in the end (delta: 16.8 MB). Free memory was 24.2 MB in the beginning and 54.2 MB in the end (delta: -30.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.05 ms. Allocated memory is still 69.2 MB. Free memory was 54.2 MB in the beginning and 53.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1722.02 ms. Allocated memory is still 69.2 MB. Free memory was 52.7 MB in the beginning and 41.6 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5529.68 ms. Allocated memory is still 69.2 MB. Free memory was 41.2 MB in the beginning and 47.4 MB in the end (delta: -6.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 39.64 ms. Allocated memory is still 69.2 MB. Free memory was 47.4 MB in the beginning and 45.0 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.plugins.generator.traceabstraction: - PositiveResult [Line: 26]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 12 SDslu, 15 SDs, 0 SdLazy, 19 SolverSat, 0 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s 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, 0 LocationsWithAnnotation, 0 PreInvPairs, 0 NumberOfFragments, 0 HoareAnnotationTreeSize, 0 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 0 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 564 SizeOfPredicates, 6 NumberOfNonLiveVariables, 59 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...