./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 f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 26bba4d307ba1cab1a3fe043c826d85928a7cf56 ................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 26bba4d307ba1cab1a3fe043c826d85928a7cf56 ..................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 11:52:42,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 11:52:42,755 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 11:52:42,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 11:52:42,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 11:52:42,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 11:52:42,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 11:52:42,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 11:52:42,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 11:52:42,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 11:52:42,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 11:52:42,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 11:52:42,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 11:52:42,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 11:52:42,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 11:52:42,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 11:52:42,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 11:52:42,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 11:52:42,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 11:52:42,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 11:52:42,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 11:52:42,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 11:52:42,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 11:52:42,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 11:52:42,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 11:52:42,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 11:52:42,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 11:52:42,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 11:52:42,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 11:52:42,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 11:52:42,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 11:52:42,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 11:52:42,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 11:52:42,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 11:52:42,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 11:52:42,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 11:52:42,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 11:52:42,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 11:52:42,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 11:52:42,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 11:52:42,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 11:52:42,785 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 11:52:42,795 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 11:52:42,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 11:52:42,796 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 11:52:42,796 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 11:52:42,796 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 11:52:42,796 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 11:52:42,796 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 11:52:42,796 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 11:52:42,796 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 11:52:42,796 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 11:52:42,797 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 11:52:42,797 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 11:52:42,797 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 11:52:42,797 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 11:52:42,797 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 11:52:42,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 11:52:42,798 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 11:52:42,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 11:52:42,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 11:52:42,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 11:52:42,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 11:52:42,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 11:52:42,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 11:52:42,798 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 11:52:42,799 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 11:52:42,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 11:52:42,799 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 11:52:42,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 11:52:42,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 11:52:42,799 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 11:52:42,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 11:52:42,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 11:52:42,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 11:52:42,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 11:52:42,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 11:52:42,800 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 11:52:42,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 11:52:42,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 11:52:42,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 11:52:42,800 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 11:52:42,800 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26bba4d307ba1cab1a3fe043c826d85928a7cf56 [2019-12-07 11:52:42,899 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 11:52:42,906 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 11:52:42,908 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 11:52:42,909 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 11:52:42,910 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 11:52:42,910 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2019-12-07 11:52:42,946 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/data/bb7d1d720/f3a60d5b20ef4feb9d070e45f56b3b23/FLAGb941f9cb4 [2019-12-07 11:52:43,351 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 11:52:43,352 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2019-12-07 11:52:43,356 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/data/bb7d1d720/f3a60d5b20ef4feb9d070e45f56b3b23/FLAGb941f9cb4 [2019-12-07 11:52:43,365 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/data/bb7d1d720/f3a60d5b20ef4feb9d070e45f56b3b23 [2019-12-07 11:52:43,366 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 11:52:43,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 11:52:43,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 11:52:43,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 11:52:43,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 11:52:43,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:52:43" (1/1) ... [2019-12-07 11:52:43,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6342ce07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:43, skipping insertion in model container [2019-12-07 11:52:43,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:52:43" (1/1) ... [2019-12-07 11:52:43,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 11:52:43,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 11:52:43,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:52:43,541 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 11:52:43,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:52:43,574 INFO L208 MainTranslator]: Completed translation [2019-12-07 11:52:43,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:43 WrapperNode [2019-12-07 11:52:43,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 11:52:43,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 11:52:43,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 11:52:43,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 11:52:43,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:43" (1/1) ... [2019-12-07 11:52:43,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:43" (1/1) ... [2019-12-07 11:52:43,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 11:52:43,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 11:52:43,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 11:52:43,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 11:52:43,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:43" (1/1) ... [2019-12-07 11:52:43,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:43" (1/1) ... [2019-12-07 11:52:43,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:43" (1/1) ... [2019-12-07 11:52:43,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:43" (1/1) ... [2019-12-07 11:52:43,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:43" (1/1) ... [2019-12-07 11:52:43,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:43" (1/1) ... [2019-12-07 11:52:43,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:43" (1/1) ... [2019-12-07 11:52:43,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 11:52:43,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 11:52:43,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 11:52:43,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 11:52:43,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 11:52:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 11:52:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2019-12-07 11:52:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 11:52:43,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 11:52:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 11:52:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 11:52:43,992 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 11:52:43,992 INFO L287 CfgBuilder]: Removed 16 assume(true) statements. [2019-12-07 11:52:43,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:52:43 BoogieIcfgContainer [2019-12-07 11:52:43,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 11:52:43,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 11:52:43,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 11:52:43,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 11:52:43,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 11:52:43" (1/3) ... [2019-12-07 11:52:43,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f13f42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:52:43, skipping insertion in model container [2019-12-07 11:52:43,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:43" (2/3) ... [2019-12-07 11:52:43,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f13f42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:52:43, skipping insertion in model container [2019-12-07 11:52:43,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:52:43" (3/3) ... [2019-12-07 11:52:43,999 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_1251b.c [2019-12-07 11:52:44,005 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 11:52:44,010 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 11:52:44,017 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 11:52:44,033 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 11:52:44,033 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 11:52:44,033 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 11:52:44,034 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 11:52:44,034 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 11:52:44,034 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 11:52:44,034 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 11:52:44,034 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 11:52:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-12-07 11:52:44,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 11:52:44,047 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:52:44,047 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:52:44,048 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:52:44,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:52:44,051 INFO L82 PathProgramCache]: Analyzing trace with hash -823041897, now seen corresponding path program 1 times [2019-12-07 11:52:44,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:52:44,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511208757] [2019-12-07 11:52:44,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:52:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:52:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:52:44,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511208757] [2019-12-07 11:52:44,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:52:44,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 11:52:44,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259919138] [2019-12-07 11:52:44,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 11:52:44,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:52:44,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 11:52:44,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 11:52:44,156 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2019-12-07 11:52:44,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:52:44,167 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2019-12-07 11:52:44,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 11:52:44,168 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-12-07 11:52:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:52:44,174 INFO L225 Difference]: With dead ends: 30 [2019-12-07 11:52:44,174 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 11:52:44,176 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 11:52:44,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 11:52:44,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-12-07 11:52:44,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 11:52:44,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-12-07 11:52:44,198 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2019-12-07 11:52:44,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:52:44,198 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-12-07 11:52:44,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 11:52:44,198 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-12-07 11:52:44,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 11:52:44,198 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:52:44,199 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:52:44,199 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:52:44,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:52:44,199 INFO L82 PathProgramCache]: Analyzing trace with hash -415274351, now seen corresponding path program 1 times [2019-12-07 11:52:44,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:52:44,199 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939200327] [2019-12-07 11:52:44,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:52:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 11:52:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 11:52:44,268 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 11:52:44,268 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 11:52:44,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 11:52:44 BoogieIcfgContainer [2019-12-07 11:52:44,284 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 11:52:44,284 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 11:52:44,284 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 11:52:44,284 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 11:52:44,285 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:52:43" (3/4) ... [2019-12-07 11:52:44,287 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 11:52:44,287 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 11:52:44,288 INFO L168 Benchmark]: Toolchain (without parser) took 920.58 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.2 MB). Free memory was 946.0 MB in the beginning and 1.0 GB in the end (delta: -82.3 MB). Peak memory consumption was 29.9 MB. Max. memory is 11.5 GB. [2019-12-07 11:52:44,289 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:52:44,289 INFO L168 Benchmark]: CACSL2BoogieTranslator took 206.52 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.2 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -161.1 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-12-07 11:52:44,289 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.64 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:52:44,290 INFO L168 Benchmark]: Boogie Preprocessor took 19.14 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 11:52:44,290 INFO L168 Benchmark]: RCFGBuilder took 369.74 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 39.8 MB). Peak memory consumption was 39.8 MB. Max. memory is 11.5 GB. [2019-12-07 11:52:44,291 INFO L168 Benchmark]: TraceAbstraction took 289.64 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 11.5 GB. [2019-12-07 11:52:44,291 INFO L168 Benchmark]: Witness Printer took 2.75 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:52:44,293 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 206.52 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.2 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -161.1 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.64 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.14 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 369.74 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 39.8 MB). Peak memory consumption was 39.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 289.64 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 11.5 GB. * Witness Printer took 2.75 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 78]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 77, overapproximation of someBinaryArithmeticDOUBLEoperation at line 65. Possible FailurePath: [L64] double x = __VERIFIER_nondet_double(); [L65] double y = 0.0 / 0.0; [L16] return x != x; [L72] COND TRUE !isnan_double(x) [L27] __uint32_t msw, lsw; [L30] ieee_double_shape_type ew_u; [L31] ew_u.value = (x) [L32] EXPR ew_u.parts.msw [L32] (msw) = ew_u.parts.msw [L33] EXPR ew_u.parts.lsw [L33] (lsw) = ew_u.parts.lsw [L36-L37] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L39-L40] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L42-L43] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L46-L47] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L50] return 0; [L55] COND TRUE __fpclassify_double(x) == 0 [L56] return y; [L74] double res = fmax_double(x, y); [L77] COND TRUE res != x [L78] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 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, 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 0.1.25-f470102 [2019-12-07 11:52:45,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 11:52:45,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 11:52:45,666 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 11:52:45,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 11:52:45,667 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 11:52:45,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 11:52:45,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 11:52:45,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 11:52:45,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 11:52:45,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 11:52:45,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 11:52:45,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 11:52:45,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 11:52:45,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 11:52:45,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 11:52:45,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 11:52:45,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 11:52:45,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 11:52:45,679 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 11:52:45,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 11:52:45,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 11:52:45,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 11:52:45,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 11:52:45,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 11:52:45,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 11:52:45,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 11:52:45,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 11:52:45,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 11:52:45,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 11:52:45,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 11:52:45,686 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 11:52:45,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 11:52:45,687 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 11:52:45,688 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 11:52:45,688 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 11:52:45,689 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 11:52:45,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 11:52:45,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 11:52:45,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 11:52:45,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 11:52:45,691 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-12-07 11:52:45,700 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 11:52:45,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 11:52:45,701 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 11:52:45,701 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 11:52:45,701 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 11:52:45,701 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 11:52:45,702 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 11:52:45,702 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 11:52:45,702 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 11:52:45,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 11:52:45,703 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 11:52:45,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 11:52:45,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 11:52:45,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 11:52:45,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 11:52:45,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 11:52:45,703 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 11:52:45,704 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-12-07 11:52:45,704 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-12-07 11:52:45,704 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 11:52:45,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 11:52:45,704 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 11:52:45,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 11:52:45,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 11:52:45,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 11:52:45,705 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 11:52:45,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 11:52:45,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 11:52:45,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 11:52:45,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 11:52:45,705 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 11:52:45,705 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-12-07 11:52:45,706 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-12-07 11:52:45,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 11:52:45,706 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 11:52:45,706 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 11:52:45,706 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26bba4d307ba1cab1a3fe043c826d85928a7cf56 [2019-12-07 11:52:45,881 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 11:52:45,889 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 11:52:45,891 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 11:52:45,892 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 11:52:45,892 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 11:52:45,892 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2019-12-07 11:52:45,929 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/data/ba0caa2f6/c16ef50476ec474f82def09a89e430c0/FLAG549eec2ce [2019-12-07 11:52:46,352 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 11:52:46,353 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2019-12-07 11:52:46,357 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/data/ba0caa2f6/c16ef50476ec474f82def09a89e430c0/FLAG549eec2ce [2019-12-07 11:52:46,366 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/data/ba0caa2f6/c16ef50476ec474f82def09a89e430c0 [2019-12-07 11:52:46,368 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 11:52:46,369 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 11:52:46,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 11:52:46,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 11:52:46,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 11:52:46,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:52:46" (1/1) ... [2019-12-07 11:52:46,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41944eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:46, skipping insertion in model container [2019-12-07 11:52:46,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:52:46" (1/1) ... [2019-12-07 11:52:46,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 11:52:46,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 11:52:46,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:52:46,502 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 11:52:46,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:52:46,538 INFO L208 MainTranslator]: Completed translation [2019-12-07 11:52:46,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:46 WrapperNode [2019-12-07 11:52:46,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 11:52:46,539 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 11:52:46,539 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 11:52:46,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 11:52:46,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:46" (1/1) ... [2019-12-07 11:52:46,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:46" (1/1) ... [2019-12-07 11:52:46,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 11:52:46,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 11:52:46,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 11:52:46,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 11:52:46,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:46" (1/1) ... [2019-12-07 11:52:46,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:46" (1/1) ... [2019-12-07 11:52:46,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:46" (1/1) ... [2019-12-07 11:52:46,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:46" (1/1) ... [2019-12-07 11:52:46,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:46" (1/1) ... [2019-12-07 11:52:46,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:46" (1/1) ... [2019-12-07 11:52:46,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:46" (1/1) ... [2019-12-07 11:52:46,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 11:52:46,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 11:52:46,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 11:52:46,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 11:52:46,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 11:52:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2019-12-07 11:52:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 11:52:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-12-07 11:52:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 11:52:46,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 11:52:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 11:52:46,901 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 11:52:46,901 INFO L287 CfgBuilder]: Removed 16 assume(true) statements. [2019-12-07 11:52:46,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:52:46 BoogieIcfgContainer [2019-12-07 11:52:46,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 11:52:46,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 11:52:46,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 11:52:46,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 11:52:46,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 11:52:46" (1/3) ... [2019-12-07 11:52:46,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6593a61e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:52:46, skipping insertion in model container [2019-12-07 11:52:46,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:52:46" (2/3) ... [2019-12-07 11:52:46,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6593a61e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:52:46, skipping insertion in model container [2019-12-07 11:52:46,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:52:46" (3/3) ... [2019-12-07 11:52:46,906 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_1251b.c [2019-12-07 11:52:46,913 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 11:52:46,917 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 11:52:46,924 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 11:52:46,938 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 11:52:46,938 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 11:52:46,939 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 11:52:46,939 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 11:52:46,939 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 11:52:46,939 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 11:52:46,939 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 11:52:46,939 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 11:52:46,948 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-12-07 11:52:46,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 11:52:46,952 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:52:46,953 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:52:46,953 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:52:46,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:52:46,957 INFO L82 PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times [2019-12-07 11:52:46,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 11:52:46,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624735308] [2019-12-07 11:52:46,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/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 [2019-12-07 11:52:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:52:47,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 1 conjunts are in the unsatisfiable core [2019-12-07 11:52:47,036 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:52:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:52:47,044 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:52:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:52:47,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624735308] [2019-12-07 11:52:47,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:52:47,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-12-07 11:52:47,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065460351] [2019-12-07 11:52:47,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 11:52:47,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 11:52:47,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 11:52:47,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 11:52:47,061 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2019-12-07 11:52:47,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:52:47,074 INFO L93 Difference]: Finished difference Result 56 states and 87 transitions. [2019-12-07 11:52:47,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 11:52:47,075 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-12-07 11:52:47,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:52:47,082 INFO L225 Difference]: With dead ends: 56 [2019-12-07 11:52:47,082 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 11:52:47,084 INFO L630 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 [2019-12-07 11:52:47,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 11:52:47,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 11:52:47,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 11:52:47,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-12-07 11:52:47,107 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2019-12-07 11:52:47,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:52:47,107 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-12-07 11:52:47,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 11:52:47,107 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-12-07 11:52:47,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 11:52:47,108 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:52:47,108 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:52:47,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 11:52:47,309 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:52:47,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:52:47,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times [2019-12-07 11:52:47,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 11:52:47,313 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532885374] [2019-12-07 11:52:47,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/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 [2019-12-07 11:52:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:52:47,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 11:52:47,482 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:52:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:52:47,499 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:52:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:52:47,511 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532885374] [2019-12-07 11:52:47,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:52:47,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-12-07 11:52:47,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858051098] [2019-12-07 11:52:47,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 11:52:47,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 11:52:47,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 11:52:47,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 11:52:47,514 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2019-12-07 11:52:47,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:52:47,583 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2019-12-07 11:52:47,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 11:52:47,583 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-12-07 11:52:47,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:52:47,584 INFO L225 Difference]: With dead ends: 50 [2019-12-07 11:52:47,584 INFO L226 Difference]: Without dead ends: 46 [2019-12-07 11:52:47,585 INFO L630 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 [2019-12-07 11:52:47,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-12-07 11:52:47,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28. [2019-12-07 11:52:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 11:52:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2019-12-07 11:52:47,589 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12 [2019-12-07 11:52:47,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:52:47,589 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2019-12-07 11:52:47,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 11:52:47,590 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2019-12-07 11:52:47,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 11:52:47,590 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:52:47,590 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:52:47,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-12-07 11:52:47,792 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:52:47,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:52:47,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times [2019-12-07 11:52:47,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 11:52:47,795 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977426741] [2019-12-07 11:52:47,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/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 [2019-12-07 11:52:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 11:52:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 11:52:48,031 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-12-07 11:52:48,031 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 11:52:48,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-12-07 11:52:48,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 11:52:48 BoogieIcfgContainer [2019-12-07 11:52:48,286 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 11:52:48,287 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 11:52:48,287 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 11:52:48,287 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 11:52:48,288 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:52:46" (3/4) ... [2019-12-07 11:52:48,290 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 11:52:48,324 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_542aba53-a0f2-4598-8851-25288662e92e/bin/utaipan/witness.graphml [2019-12-07 11:52:48,324 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 11:52:48,326 INFO L168 Benchmark]: Toolchain (without parser) took 1956.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 953.7 MB in the beginning and 1.0 GB in the end (delta: -50.8 MB). Peak memory consumption was 78.7 MB. Max. memory is 11.5 GB. [2019-12-07 11:52:48,326 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:52:48,326 INFO L168 Benchmark]: CACSL2BoogieTranslator took 169.20 ms. Allocated memory is still 1.0 GB. Free memory was 953.7 MB in the beginning and 937.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2019-12-07 11:52:48,327 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 937.6 MB in the beginning and 1.1 GB in the end (delta: -187.7 MB). Peak memory consumption was 10.3 MB. Max. memory is 11.5 GB. [2019-12-07 11:52:48,327 INFO L168 Benchmark]: Boogie Preprocessor took 22.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-12-07 11:52:48,328 INFO L168 Benchmark]: RCFGBuilder took 282.47 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 31.6 MB). Peak memory consumption was 31.6 MB. Max. memory is 11.5 GB. [2019-12-07 11:52:48,328 INFO L168 Benchmark]: TraceAbstraction took 1384.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 75.7 MB). Peak memory consumption was 75.7 MB. Max. memory is 11.5 GB. [2019-12-07 11:52:48,328 INFO L168 Benchmark]: Witness Printer took 37.55 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-12-07 11:52:48,330 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 169.20 ms. Allocated memory is still 1.0 GB. Free memory was 953.7 MB in the beginning and 937.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 58.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 937.6 MB in the beginning and 1.1 GB in the end (delta: -187.7 MB). Peak memory consumption was 10.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 282.47 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 31.6 MB). Peak memory consumption was 31.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1384.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 75.7 MB). Peak memory consumption was 75.7 MB. Max. memory is 11.5 GB. * Witness Printer took 37.55 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 78]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L64] double x = __VERIFIER_nondet_double(); [L65] double y = 0.0 / 0.0; [L16] return x != x; [L72] COND TRUE !isnan_double(x) [L27] __uint32_t msw, lsw; [L30] ieee_double_shape_type ew_u; [L31] ew_u.value = (x) [L32] EXPR ew_u.parts.msw [L32] (msw) = ew_u.parts.msw [L33] EXPR ew_u.parts.lsw [L33] (lsw) = ew_u.parts.lsw [L36-L37] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L39-L40] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L42-L43] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L46-L47] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L50] return 0; [L55] COND TRUE __fpclassify_double(x) == 0 [L56] return y; [L74] double res = fmax_double(x, y); [L77] COND TRUE res != x [L78] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.2s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 77 SDtfs, 30 SDslu, 64 SDs, 0 SdLazy, 23 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=30occurred 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, 71 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...