/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/float-newlib/float_req_bl_1072d.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:06:56,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:06:56,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:06:56,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:06:56,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:06:56,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:06:56,926 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:06:56,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:06:56,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:06:56,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:06:56,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:06:56,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:06:56,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:06:56,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:06:56,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:06:56,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:06:56,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:06:56,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:06:56,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:06:56,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:06:56,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:06:56,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:06:56,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:06:56,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:06:56,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:06:57,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:06:57,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:06:57,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:06:57,010 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:06:57,036 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:06:57,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:06:57,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:06:57,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:06:57,038 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:06:57,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:06:57,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:06:57,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:06:57,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:06:57,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:06:57,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:06:57,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:06:57,040 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:06:57,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:06:57,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:06:57,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:06:57,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:06:57,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:06:57,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:06:57,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:06:57,043 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:06:57,043 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:06:57,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:06:57,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:06:57,043 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:06:57,044 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:06:57,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:06:57,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:06:57,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:06:57,483 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:06:57,484 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:06:57,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1072d.c [2021-01-06 16:06:57,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4d0a2c949/6df887ca652740a5a53de51b6291d03d/FLAG4a7b68fb7 [2021-01-06 16:06:58,241 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:06:58,242 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1072d.c [2021-01-06 16:06:58,249 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4d0a2c949/6df887ca652740a5a53de51b6291d03d/FLAG4a7b68fb7 [2021-01-06 16:06:58,612 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4d0a2c949/6df887ca652740a5a53de51b6291d03d [2021-01-06 16:06:58,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:06:58,621 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:06:58,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:06:58,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:06:58,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:06:58,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:06:58" (1/1) ... [2021-01-06 16:06:58,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@457e0b81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:58, skipping insertion in model container [2021-01-06 16:06:58,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:06:58" (1/1) ... [2021-01-06 16:06:58,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:06:58,662 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: StructLHS[VariableLHS[~gf_u~0,],value] left hand side expression in assignment: lhs: VariableLHS[~w~0,] left hand side expression in assignment: lhs: VariableLHS[~signbit~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~exponent_less_127~0,] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~sf_u~0,],word] left hand side expression in assignment: lhs: VariableLHS[~x,] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~sf_u~1,],word] left hand side expression in assignment: lhs: VariableLHS[~x,] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~gf_u~1,],value] left hand side expression in assignment: lhs: VariableLHS[~w~1,] [2021-01-06 16:06:58,856 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1072d.c[1573,1586] [2021-01-06 16:06:58,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:06:58,870 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#gf_u~0,],base],StructAccessExpression[IdentifierExpression[~#gf_u~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~w~0,] left hand side expression in assignment: lhs: VariableLHS[~signbit~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~exponent_less_127~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#sf_u~0,],base],StructAccessExpression[IdentifierExpression[~#sf_u~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~x,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#sf_u~1,],base],StructAccessExpression[IdentifierExpression[~#sf_u~1,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~x,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#gf_u~1,],base],StructAccessExpression[IdentifierExpression[~#gf_u~1,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~w~1,] [2021-01-06 16:06:58,904 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1072d.c[1573,1586] [2021-01-06 16:06:58,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:06:58,926 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:06:58,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:58 WrapperNode [2021-01-06 16:06:58,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:06:58,928 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:06:58,928 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:06:58,928 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:06:58,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:58" (1/1) ... [2021-01-06 16:06:58,949 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:58" (1/1) ... [2021-01-06 16:06:58,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:06:58,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:06:58,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:06:58,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:06:58,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:58" (1/1) ... [2021-01-06 16:06:58,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:58" (1/1) ... [2021-01-06 16:06:58,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:58" (1/1) ... [2021-01-06 16:06:58,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:58" (1/1) ... [2021-01-06 16:06:59,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:58" (1/1) ... [2021-01-06 16:06:59,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:58" (1/1) ... [2021-01-06 16:06:59,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:58" (1/1) ... [2021-01-06 16:06:59,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:06:59,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:06:59,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:06:59,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:06:59,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/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 [2021-01-06 16:06:59,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:06:59,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:06:59,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-01-06 16:06:59,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 16:06:59,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-01-06 16:06:59,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:06:59,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:06:59,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:06:59,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:06:59,836 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:06:59,836 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-01-06 16:06:59,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:06:59 BoogieIcfgContainer [2021-01-06 16:06:59,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:06:59,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:06:59,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:06:59,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:06:59,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:06:58" (1/3) ... [2021-01-06 16:06:59,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea356c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:06:59, skipping insertion in model container [2021-01-06 16:06:59,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:58" (2/3) ... [2021-01-06 16:06:59,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea356c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:06:59, skipping insertion in model container [2021-01-06 16:06:59,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:06:59" (3/3) ... [2021-01-06 16:06:59,849 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1072d.c [2021-01-06 16:06:59,856 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:06:59,861 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:06:59,882 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:06:59,911 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:06:59,911 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:06:59,911 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:06:59,912 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:06:59,912 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:06:59,912 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:06:59,912 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:06:59,912 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:06:59,931 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2021-01-06 16:06:59,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:06:59,941 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:06:59,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:06:59,943 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:06:59,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:06:59,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1236259765, now seen corresponding path program 1 times [2021-01-06 16:06:59,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:06:59,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964258674] [2021-01-06 16:06:59,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:07:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:07:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:07:00,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964258674] [2021-01-06 16:07:00,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:07:00,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:07:00,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749521137] [2021-01-06 16:07:00,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:07:00,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:07:00,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:07:00,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:07:00,141 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2021-01-06 16:07:00,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:07:00,163 INFO L93 Difference]: Finished difference Result 56 states and 88 transitions. [2021-01-06 16:07:00,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:07:00,165 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 16:07:00,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:07:00,174 INFO L225 Difference]: With dead ends: 56 [2021-01-06 16:07:00,175 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 16:07:00,178 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 [2021-01-06 16:07:00,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 16:07:00,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 16:07:00,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 16:07:00,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-01-06 16:07:00,217 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2021-01-06 16:07:00,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:07:00,218 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-01-06 16:07:00,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:07:00,218 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-01-06 16:07:00,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:07:00,219 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:07:00,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:07:00,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:07:00,220 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:07:00,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:07:00,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1856180690, now seen corresponding path program 1 times [2021-01-06 16:07:00,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:07:00,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072950524] [2021-01-06 16:07:00,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:07:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:07:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:07:00,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072950524] [2021-01-06 16:07:00,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:07:00,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:07:00,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469376811] [2021-01-06 16:07:00,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:07:00,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:07:00,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:07:00,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:07:00,326 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2021-01-06 16:07:00,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:07:00,428 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-01-06 16:07:00,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:07:00,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-01-06 16:07:00,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:07:00,430 INFO L225 Difference]: With dead ends: 54 [2021-01-06 16:07:00,431 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 16:07:00,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:07:00,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 16:07:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2021-01-06 16:07:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 16:07:00,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-01-06 16:07:00,439 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 12 [2021-01-06 16:07:00,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:07:00,439 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-01-06 16:07:00,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:07:00,439 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-01-06 16:07:00,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:07:00,440 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:07:00,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:07:00,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:07:00,441 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:07:00,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:07:00,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1128631073, now seen corresponding path program 1 times [2021-01-06 16:07:00,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:07:00,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58143408] [2021-01-06 16:07:00,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:07:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:07:00,482 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:07:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:07:00,519 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:07:00,550 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:07:00,551 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:07:00,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:07:00,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:07:00 BoogieIcfgContainer [2021-01-06 16:07:00,588 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:07:00,589 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:07:00,589 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:07:00,589 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:07:00,590 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:06:59" (3/4) ... [2021-01-06 16:07:00,595 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 16:07:00,595 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:07:00,598 INFO L168 Benchmark]: Toolchain (without parser) took 1976.35 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 92.7 MB in the end (delta: 34.2 MB). Peak memory consumption was 34.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:00,599 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:07:00,600 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.53 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 115.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:00,600 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.98 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 113.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:00,601 INFO L168 Benchmark]: Boogie Preprocessor took 41.61 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 112.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:00,602 INFO L168 Benchmark]: RCFGBuilder took 811.47 ms. Allocated memory is still 151.0 MB. Free memory was 112.0 MB in the beginning and 126.8 MB in the end (delta: -14.8 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:00,603 INFO L168 Benchmark]: TraceAbstraction took 748.05 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 93.2 MB in the end (delta: 33.1 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:00,604 INFO L168 Benchmark]: Witness Printer took 6.17 ms. Allocated memory is still 151.0 MB. Free memory was 93.2 MB in the beginning and 92.7 MB in the end (delta: 491.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:07:00,609 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 304.53 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 115.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 53.98 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 113.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.61 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 112.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 811.47 ms. Allocated memory is still 151.0 MB. Free memory was 112.0 MB in the beginning and 126.8 MB in the end (delta: -14.8 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 748.05 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 93.2 MB in the end (delta: 33.1 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. * Witness Printer took 6.17 ms. Allocated memory is still 151.0 MB. Free memory was 93.2 MB in the beginning and 92.7 MB in the end (delta: 491.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 69]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 68, overapproximation of someUnaryFLOAToperation at line 64, overapproximation of bitwiseAnd at line 22. Possible FailurePath: [L64] float x = -0.0f; [L15] __int32_t signbit, w, exponent_less_127; [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (w) = gf_u.word [L21] signbit = w & 0x80000000 [L22] exponent_less_127 = ((w & 0x7f800000) >> 23) - 127 [L23] COND TRUE exponent_less_127 < 23 [L24] COND TRUE exponent_less_127 < 0 [L27] ieee_float_shape_type sf_u; [L28] sf_u.word = (signbit) [L29] EXPR sf_u.value [L29] (x) = sf_u.value [L42] return x; [L65] float res = trunc_float(x); [L68] EXPR res == -0.0f && __signbit_float(res) == 1 [L68] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L69] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 62 SDtfs, 29 SDslu, 46 SDs, 0 SdLazy, 18 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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, 12 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 331 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...