./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/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 0dca3295f12b1ef36cf31c463cf879069525072f ........................................................................................................................................................................................................................................................................................................... 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_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/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 0dca3295f12b1ef36cf31c463cf879069525072f .............................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:02:56,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:02:56,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:02:56,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:02:56,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:02:56,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:02:56,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:02:56,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:02:56,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:02:56,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:02:56,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:02:56,986 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:02:56,986 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:02:56,988 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:02:56,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:02:56,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:02:56,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:02:56,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:02:56,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:02:57,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:02:57,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:02:57,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:02:57,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:02:57,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:02:57,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:02:57,026 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:02:57,026 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:02:57,027 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:02:57,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:02:57,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:02:57,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:02:57,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:02:57,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:02:57,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:02:57,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:02:57,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:02:57,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:02:57,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:02:57,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:02:57,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:02:57,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:02:57,043 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:02:57,081 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:02:57,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:02:57,083 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:02:57,083 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:02:57,083 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:02:57,083 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:02:57,084 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:02:57,084 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:02:57,084 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:02:57,084 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:02:57,085 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:02:57,085 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:02:57,085 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:02:57,085 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:02:57,086 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:02:57,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:02:57,087 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:02:57,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:02:57,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:02:57,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:02:57,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:02:57,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:02:57,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:02:57,088 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:02:57,088 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:02:57,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:02:57,089 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:02:57,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:02:57,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:02:57,089 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:02:57,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:02:57,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:02:57,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:02:57,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:02:57,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:02:57,091 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:02:57,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:02:57,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:02:57,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:02:57,092 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:02:57,092 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_1e11da40-4b61-4575-baf1-939d0767accf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dca3295f12b1ef36cf31c463cf879069525072f [2020-11-22 13:02:57,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:02:57,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:02:57,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:02:57,378 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:02:57,379 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:02:57,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2020-11-22 13:02:57,459 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/data/d69f23583/0259dc3834d14a32ba416a836551615d/FLAG756108bc9 [2020-11-22 13:02:57,894 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:02:57,894 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2020-11-22 13:02:57,900 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/data/d69f23583/0259dc3834d14a32ba416a836551615d/FLAG756108bc9 [2020-11-22 13:02:58,279 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/data/d69f23583/0259dc3834d14a32ba416a836551615d [2020-11-22 13:02:58,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:02:58,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:02:58,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:02:58,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:02:58,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:02:58,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:02:58" (1/1) ... [2020-11-22 13:02:58,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ebdfd65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:58, skipping insertion in model container [2020-11-22 13:02:58,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:02:58" (1/1) ... [2020-11-22 13:02:58,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:02:58,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:02:58,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:02:58,514 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:02:58,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:02:58,574 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:02:58,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:58 WrapperNode [2020-11-22 13:02:58,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:02:58,576 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:02:58,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:02:58,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:02:58,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:58" (1/1) ... [2020-11-22 13:02:58,601 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:58" (1/1) ... [2020-11-22 13:02:58,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:02:58,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:02:58,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:02:58,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:02:58,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:58" (1/1) ... [2020-11-22 13:02:58,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:58" (1/1) ... [2020-11-22 13:02:58,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:58" (1/1) ... [2020-11-22 13:02:58,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:58" (1/1) ... [2020-11-22 13:02:58,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:58" (1/1) ... [2020-11-22 13:02:58,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:58" (1/1) ... [2020-11-22 13:02:58,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:58" (1/1) ... [2020-11-22 13:02:58,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:02:58,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:02:58,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:02:58,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:02:58,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/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 [2020-11-22 13:02:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:02:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:02:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-22 13:02:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:02:58,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:02:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-22 13:02:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:02:59,510 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:02:59,511 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-11-22 13:02:59,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:02:59 BoogieIcfgContainer [2020-11-22 13:02:59,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:02:59,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:02:59,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:02:59,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:02:59,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:02:58" (1/3) ... [2020-11-22 13:02:59,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641459a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:02:59, skipping insertion in model container [2020-11-22 13:02:59,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:58" (2/3) ... [2020-11-22 13:02:59,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641459a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:02:59, skipping insertion in model container [2020-11-22 13:02:59,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:02:59" (3/3) ... [2020-11-22 13:02:59,519 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1251b.c [2020-11-22 13:02:59,529 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:02:59,534 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 13:02:59,545 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 13:02:59,568 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:02:59,568 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:02:59,568 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:02:59,568 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:02:59,568 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:02:59,569 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:02:59,569 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:02:59,569 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:02:59,581 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-11-22 13:02:59,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 13:02:59,586 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:02:59,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:02:59,587 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:02:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:02:59,592 INFO L82 PathProgramCache]: Analyzing trace with hash 120580543, now seen corresponding path program 1 times [2020-11-22 13:02:59,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:02:59,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603487284] [2020-11-22 13:02:59,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:02:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:02:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:02:59,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603487284] [2020-11-22 13:02:59,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:02:59,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:02:59,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377322715] [2020-11-22 13:02:59,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 13:02:59,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:02:59,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 13:02:59,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:02:59,810 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-11-22 13:02:59,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:02:59,828 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2020-11-22 13:02:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 13:02:59,830 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-22 13:02:59,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:02:59,846 INFO L225 Difference]: With dead ends: 30 [2020-11-22 13:02:59,846 INFO L226 Difference]: Without dead ends: 13 [2020-11-22 13:02:59,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:02:59,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-22 13:02:59,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-22 13:02:59,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-22 13:02:59,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-11-22 13:02:59,883 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2020-11-22 13:02:59,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:02:59,883 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-11-22 13:02:59,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 13:02:59,883 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-11-22 13:02:59,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 13:02:59,884 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:02:59,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:02:59,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:02:59,885 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:02:59,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:02:59,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1532511713, now seen corresponding path program 1 times [2020-11-22 13:02:59,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:02:59,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056078818] [2020-11-22 13:02:59,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:02:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:02:59,946 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:02:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:02:59,983 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:03:00,006 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 13:03:00,006 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 13:03:00,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:03:00,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:03:00 BoogieIcfgContainer [2020-11-22 13:03:00,031 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:03:00,032 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:03:00,032 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:03:00,032 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:03:00,035 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:02:59" (3/4) ... [2020-11-22 13:03:00,037 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-22 13:03:00,038 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:03:00,040 INFO L168 Benchmark]: Toolchain (without parser) took 1755.99 ms. Allocated memory is still 113.2 MB. Free memory was 74.7 MB in the beginning and 72.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.0 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:00,042 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 113.2 MB. Free memory is still 91.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:03:00,043 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.23 ms. Allocated memory is still 113.2 MB. Free memory was 74.4 MB in the beginning and 88.5 MB in the end (delta: -14.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:00,044 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.98 ms. Allocated memory is still 113.2 MB. Free memory was 88.3 MB in the beginning and 86.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:00,045 INFO L168 Benchmark]: Boogie Preprocessor took 28.49 ms. Allocated memory is still 113.2 MB. Free memory was 86.5 MB in the beginning and 85.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:00,046 INFO L168 Benchmark]: RCFGBuilder took 857.87 ms. Allocated memory is still 113.2 MB. Free memory was 85.1 MB in the beginning and 46.6 MB in the end (delta: 38.5 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:00,047 INFO L168 Benchmark]: TraceAbstraction took 517.46 ms. Allocated memory is still 113.2 MB. Free memory was 46.0 MB in the beginning and 72.0 MB in the end (delta: -26.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:03:00,048 INFO L168 Benchmark]: Witness Printer took 5.85 ms. Allocated memory is still 113.2 MB. Free memory is still 72.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:03:00,056 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 113.2 MB. Free memory is still 91.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 291.23 ms. Allocated memory is still 113.2 MB. Free memory was 74.4 MB in the beginning and 88.5 MB in the end (delta: -14.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.98 ms. Allocated memory is still 113.2 MB. Free memory was 88.3 MB in the beginning and 86.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.49 ms. Allocated memory is still 113.2 MB. Free memory was 86.5 MB in the beginning and 85.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 857.87 ms. Allocated memory is still 113.2 MB. Free memory was 85.1 MB in the beginning and 46.6 MB in the end (delta: 38.5 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 517.46 ms. Allocated memory is still 113.2 MB. Free memory was 46.0 MB in the beginning and 72.0 MB in the end (delta: -26.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 5.85 ms. Allocated memory is still 113.2 MB. Free memory is still 72.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 79, overapproximation of someBinaryArithmeticDOUBLEoperation at line 67. Possible FailurePath: [L66] double x = __VERIFIER_nondet_double(); [L67] double y = 0.0 / 0.0; [L18] return x != x; [L74] COND TRUE !isnan_double(x) [L29] __uint32_t msw, lsw; [L32] ieee_double_shape_type ew_u; [L33] ew_u.value = (x) [L34] EXPR ew_u.parts.msw [L34] (msw) = ew_u.parts.msw [L35] EXPR ew_u.parts.lsw [L35] (lsw) = ew_u.parts.lsw [L38-L39] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L41-L42] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L44-L45] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L48-L49] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L52] return 0; [L57] COND TRUE __fpclassify_double(x) == 0 [L58] return y; [L76] double res = fmax_double(x, y); [L79] COND TRUE res != x [L3] __assert_fail("0", "double_req_bl_1251b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 49 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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-a4ecdab [2020-11-22 13:03:02,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:03:02,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:03:02,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:03:02,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:03:02,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:03:02,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:03:02,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:03:02,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:03:02,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:03:02,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:03:02,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:03:02,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:03:02,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:03:02,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:03:02,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:03:02,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:03:02,613 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:03:02,617 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:03:02,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:03:02,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:03:02,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:03:02,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:03:02,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:03:02,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:03:02,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:03:02,644 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:03:02,651 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:03:02,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:03:02,653 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:03:02,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:03:02,655 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:03:02,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:03:02,657 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:03:02,658 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:03:02,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:03:02,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:03:02,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:03:02,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:03:02,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:03:02,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:03:02,664 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-22 13:03:02,707 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:03:02,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:03:02,710 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:03:02,710 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:03:02,710 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:03:02,711 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:03:02,711 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:03:02,711 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:03:02,711 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:03:02,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:03:02,714 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:03:02,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:03:02,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:03:02,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:03:02,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:03:02,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:03:02,715 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:03:02,716 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-22 13:03:02,716 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-22 13:03:02,716 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:03:02,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:03:02,717 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:03:02,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:03:02,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:03:02,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-22 13:03:02,718 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:03:02,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:03:02,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:03:02,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:03:02,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:03:02,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:03:02,719 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-22 13:03:02,720 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-22 13:03:02,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:03:02,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:03:02,720 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:03:02,721 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_1e11da40-4b61-4575-baf1-939d0767accf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dca3295f12b1ef36cf31c463cf879069525072f [2020-11-22 13:03:03,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:03:03,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:03:03,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:03:03,142 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:03:03,149 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:03:03,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2020-11-22 13:03:03,224 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/data/480103a3f/c6b2d4f506ac4b9aa368740606474c86/FLAGddadd6032 [2020-11-22 13:03:03,757 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:03:03,758 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2020-11-22 13:03:03,764 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/data/480103a3f/c6b2d4f506ac4b9aa368740606474c86/FLAGddadd6032 [2020-11-22 13:03:04,126 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/data/480103a3f/c6b2d4f506ac4b9aa368740606474c86 [2020-11-22 13:03:04,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:03:04,130 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:03:04,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:03:04,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:03:04,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:03:04,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:03:04" (1/1) ... [2020-11-22 13:03:04,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@358d726d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:04, skipping insertion in model container [2020-11-22 13:03:04,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:03:04" (1/1) ... [2020-11-22 13:03:04,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:03:04,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:03:04,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:03:04,340 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:03:04,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:03:04,382 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:03:04,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:04 WrapperNode [2020-11-22 13:03:04,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:03:04,384 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:03:04,384 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:03:04,384 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:03:04,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:04" (1/1) ... [2020-11-22 13:03:04,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:04" (1/1) ... [2020-11-22 13:03:04,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:03:04,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:03:04,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:03:04,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:03:04,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:04" (1/1) ... [2020-11-22 13:03:04,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:04" (1/1) ... [2020-11-22 13:03:04,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:04" (1/1) ... [2020-11-22 13:03:04,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:04" (1/1) ... [2020-11-22 13:03:04,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:04" (1/1) ... [2020-11-22 13:03:04,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:04" (1/1) ... [2020-11-22 13:03:04,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:04" (1/1) ... [2020-11-22 13:03:04,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:03:04,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:03:04,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:03:04,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:03:04,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/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 [2020-11-22 13:03:04,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-11-22 13:03:04,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-22 13:03:04,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:03:04,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-22 13:03:04,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:03:04,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:03:04,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:03:05,146 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:03:05,146 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-11-22 13:03:05,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:03:05 BoogieIcfgContainer [2020-11-22 13:03:05,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:03:05,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:03:05,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:03:05,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:03:05,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:03:04" (1/3) ... [2020-11-22 13:03:05,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dbab612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:03:05, skipping insertion in model container [2020-11-22 13:03:05,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:04" (2/3) ... [2020-11-22 13:03:05,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dbab612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:03:05, skipping insertion in model container [2020-11-22 13:03:05,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:03:05" (3/3) ... [2020-11-22 13:03:05,158 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1251b.c [2020-11-22 13:03:05,168 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:03:05,172 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 13:03:05,183 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 13:03:05,221 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:03:05,222 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:03:05,222 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:03:05,222 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:03:05,222 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:03:05,222 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:03:05,222 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:03:05,222 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:03:05,236 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-11-22 13:03:05,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 13:03:05,242 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:05,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:05,243 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:03:05,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:05,248 INFO L82 PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times [2020-11-22 13:03:05,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:03:05,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260947501] [2020-11-22 13:03:05,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/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 [2020-11-22 13:03:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:05,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-22 13:03:05,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:03:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:05,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:03:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:05,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260947501] [2020-11-22 13:03:05,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:05,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-22 13:03:05,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075150996] [2020-11-22 13:03:05,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 13:03:05,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 13:03:05,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 13:03:05,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:03:05,431 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-11-22 13:03:05,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:05,457 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2020-11-22 13:03:05,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 13:03:05,460 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-11-22 13:03:05,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:05,477 INFO L225 Difference]: With dead ends: 57 [2020-11-22 13:03:05,477 INFO L226 Difference]: Without dead ends: 26 [2020-11-22 13:03:05,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:03:05,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-22 13:03:05,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-22 13:03:05,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-22 13:03:05,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-11-22 13:03:05,529 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2020-11-22 13:03:05,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:05,529 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-11-22 13:03:05,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 13:03:05,529 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-11-22 13:03:05,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 13:03:05,530 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:05,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:05,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-22 13:03:05,752 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:03:05,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:05,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times [2020-11-22 13:03:05,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:03:05,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791927862] [2020-11-22 13:03:05,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/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 [2020-11-22 13:03:05,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:05,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-22 13:03:05,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:03:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:05,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:03:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:05,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791927862] [2020-11-22 13:03:05,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:05,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-22 13:03:05,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175093045] [2020-11-22 13:03:05,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:03:05,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 13:03:05,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:03:05,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:03:05,948 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2020-11-22 13:03:06,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:06,077 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-11-22 13:03:06,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:03:06,079 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-22 13:03:06,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:06,079 INFO L225 Difference]: With dead ends: 50 [2020-11-22 13:03:06,079 INFO L226 Difference]: Without dead ends: 46 [2020-11-22 13:03:06,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:03:06,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-22 13:03:06,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28. [2020-11-22 13:03:06,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-22 13:03:06,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-11-22 13:03:06,087 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12 [2020-11-22 13:03:06,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:06,087 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-11-22 13:03:06,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:03:06,088 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-11-22 13:03:06,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-22 13:03:06,088 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:06,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:06,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-22 13:03:06,307 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:03:06,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:06,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times [2020-11-22 13:03:06,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:03:06,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288196666] [2020-11-22 13:03:06,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-11-22 13:03:06,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:03:06,456 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:03:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:03:06,560 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:03:06,600 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-11-22 13:03:06,601 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 13:03:06,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-22 13:03:06,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:03:06 BoogieIcfgContainer [2020-11-22 13:03:06,835 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:03:06,836 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:03:06,836 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:03:06,836 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:03:06,837 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:03:05" (3/4) ... [2020-11-22 13:03:06,839 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 13:03:06,885 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1e11da40-4b61-4575-baf1-939d0767accf/bin/utaipan/witness.graphml [2020-11-22 13:03:06,886 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:03:06,888 INFO L168 Benchmark]: Toolchain (without parser) took 2756.95 ms. Allocated memory was 50.3 MB in the beginning and 86.0 MB in the end (delta: 35.7 MB). Free memory was 27.0 MB in the beginning and 55.4 MB in the end (delta: -28.4 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:06,888 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 50.3 MB. Free memory was 32.1 MB in the beginning and 32.1 MB in the end (delta: 25.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:03:06,889 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.42 ms. Allocated memory is still 50.3 MB. Free memory was 26.8 MB in the beginning and 29.5 MB in the end (delta: -2.6 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:06,890 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.97 ms. Allocated memory was 50.3 MB in the beginning and 65.0 MB in the end (delta: 14.7 MB). Free memory was 29.5 MB in the beginning and 47.6 MB in the end (delta: -18.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:06,890 INFO L168 Benchmark]: Boogie Preprocessor took 34.14 ms. Allocated memory is still 65.0 MB. Free memory was 47.6 MB in the beginning and 46.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:03:06,891 INFO L168 Benchmark]: RCFGBuilder took 645.70 ms. Allocated memory is still 65.0 MB. Free memory was 45.8 MB in the beginning and 41.3 MB in the end (delta: 4.5 MB). Peak memory consumption was 18.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:06,892 INFO L168 Benchmark]: TraceAbstraction took 1686.33 ms. Allocated memory was 65.0 MB in the beginning and 86.0 MB in the end (delta: 21.0 MB). Free memory was 40.9 MB in the beginning and 57.5 MB in the end (delta: -16.6 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:06,892 INFO L168 Benchmark]: Witness Printer took 49.74 ms. Allocated memory is still 86.0 MB. Free memory was 57.5 MB in the beginning and 55.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:06,896 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 50.3 MB. Free memory was 32.1 MB in the beginning and 32.1 MB in the end (delta: 25.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 241.42 ms. Allocated memory is still 50.3 MB. Free memory was 26.8 MB in the beginning and 29.5 MB in the end (delta: -2.6 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 75.97 ms. Allocated memory was 50.3 MB in the beginning and 65.0 MB in the end (delta: 14.7 MB). Free memory was 29.5 MB in the beginning and 47.6 MB in the end (delta: -18.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.14 ms. Allocated memory is still 65.0 MB. Free memory was 47.6 MB in the beginning and 46.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 645.70 ms. Allocated memory is still 65.0 MB. Free memory was 45.8 MB in the beginning and 41.3 MB in the end (delta: 4.5 MB). Peak memory consumption was 18.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1686.33 ms. Allocated memory was 65.0 MB in the beginning and 86.0 MB in the end (delta: 21.0 MB). Free memory was 40.9 MB in the beginning and 57.5 MB in the end (delta: -16.6 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Witness Printer took 49.74 ms. Allocated memory is still 86.0 MB. Free memory was 57.5 MB in the beginning and 55.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L66] double x = __VERIFIER_nondet_double(); [L67] double y = 0.0 / 0.0; [L18] return x != x; [L74] COND TRUE !isnan_double(x) [L29] __uint32_t msw, lsw; [L32] ieee_double_shape_type ew_u; [L33] ew_u.value = (x) [L34] EXPR ew_u.parts.msw [L34] (msw) = ew_u.parts.msw [L35] EXPR ew_u.parts.lsw [L35] (lsw) = ew_u.parts.lsw [L38-L39] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L41-L42] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L44-L45] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L48-L49] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L52] return 0; [L57] COND TRUE __fpclassify_double(x) == 0 [L58] return y; [L76] double res = fmax_double(x, y); [L79] COND TRUE res != x [L3] __assert_fail("0", "double_req_bl_1251b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 77 SDtfs, 30 SDslu, 98 SDs, 0 SdLazy, 27 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 18 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 552 SizeOfPredicates, 1 NumberOfNonLiveVariables, 101 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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 incorrect! Received shutdown request...