/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_0720.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:06:32,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:06:32,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:06:32,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:06:32,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:06:32,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:06:32,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:06:32,918 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:06:32,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:06:32,928 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:06:32,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:06:32,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:06:32,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:06:32,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:06:32,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:06:32,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:06:32,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:06:32,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:06:32,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:06:32,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:06:32,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:06:32,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:06:32,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:06:32,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:06:32,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:06:32,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:06:33,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:06:33,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:06:33,002 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 16:06:33,053 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:06:33,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:06:33,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:06:33,059 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:06:33,059 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:06:33,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:06:33,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:06:33,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:06:33,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:06:33,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:06:33,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:06:33,062 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:06:33,062 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:06:33,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:06:33,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:06:33,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:06:33,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:06:33,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:06:33,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:06:33,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:06:33,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:06:33,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:06:33,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:06:33,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:06:33,065 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:06:33,065 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:06:33,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:06:33,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:06:33,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:06:33,568 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:06:33,569 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:06:33,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_0720.c [2021-01-06 16:06:33,660 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/245390a72/23626297c9e749f4b047e0c79c2470c8/FLAGa8fa7dd4f [2021-01-06 16:06:34,314 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:06:34,315 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_0720.c [2021-01-06 16:06:34,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/245390a72/23626297c9e749f4b047e0c79c2470c8/FLAGa8fa7dd4f [2021-01-06 16:06:34,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/245390a72/23626297c9e749f4b047e0c79c2470c8 [2021-01-06 16:06:34,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:06:34,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:06:34,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:06:34,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:06:34,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:06:34,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:06:34" (1/1) ... [2021-01-06 16:06:34,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@660a1a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:34, skipping insertion in model container [2021-01-06 16:06:34,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:06:34" (1/1) ... [2021-01-06 16:06:34,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:06:34,734 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[~ix~0,] left hand side expression in assignment: lhs: VariableLHS[~hx~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~m~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ix~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~ix~0,] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~sf_u~0,],word] left hand side expression in assignment: lhs: VariableLHS[~z~0,] [2021-01-06 16:06:34,925 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_0720.c[1929,1942] [2021-01-06 16:06:34,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:06:34,940 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[~ix~0,] left hand side expression in assignment: lhs: VariableLHS[~hx~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~m~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ix~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~ix~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[~z~0,] [2021-01-06 16:06:34,976 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_0720.c[1929,1942] [2021-01-06 16:06:34,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:06:34,999 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:06:35,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:35 WrapperNode [2021-01-06 16:06:35,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:06:35,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:06:35,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:06:35,004 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:06:35,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:35" (1/1) ... [2021-01-06 16:06:35,042 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:35" (1/1) ... [2021-01-06 16:06:35,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:06:35,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:06:35,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:06:35,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:06:35,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:35" (1/1) ... [2021-01-06 16:06:35,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:35" (1/1) ... [2021-01-06 16:06:35,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:35" (1/1) ... [2021-01-06 16:06:35,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:35" (1/1) ... [2021-01-06 16:06:35,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:35" (1/1) ... [2021-01-06 16:06:35,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:35" (1/1) ... [2021-01-06 16:06:35,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:35" (1/1) ... [2021-01-06 16:06:35,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:06:35,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:06:35,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:06:35,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:06:35,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:35" (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 16:06:35,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:06:35,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:06:35,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-01-06 16:06:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 16:06:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-01-06 16:06:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:06:35,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:06:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:06:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:06:36,077 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:06:36,080 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-01-06 16:06:36,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:06:36 BoogieIcfgContainer [2021-01-06 16:06:36,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:06:36,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:06:36,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:06:36,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:06:36,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:06:34" (1/3) ... [2021-01-06 16:06:36,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bfb76ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:06:36, skipping insertion in model container [2021-01-06 16:06:36,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:06:35" (2/3) ... [2021-01-06 16:06:36,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bfb76ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:06:36, skipping insertion in model container [2021-01-06 16:06:36,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:06:36" (3/3) ... [2021-01-06 16:06:36,097 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_0720.c [2021-01-06 16:06:36,104 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:06:36,110 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:06:36,135 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:06:36,164 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:06:36,164 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:06:36,165 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:06:36,165 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:06:36,165 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:06:36,165 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:06:36,165 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:06:36,165 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:06:36,181 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2021-01-06 16:06:36,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:06:36,187 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:06:36,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:06:36,188 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:06:36,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:06:36,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1826743550, now seen corresponding path program 1 times [2021-01-06 16:06:36,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:06:36,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950099662] [2021-01-06 16:06:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:06:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:06:36,364 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 16:06:36,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950099662] [2021-01-06 16:06:36,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:06:36,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:06:36,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451581068] [2021-01-06 16:06:36,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:06:36,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:06:36,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:06:36,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:06:36,395 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2021-01-06 16:06:36,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:06:36,419 INFO L93 Difference]: Finished difference Result 78 states and 128 transitions. [2021-01-06 16:06:36,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:06:36,420 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 16:06:36,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:06:36,434 INFO L225 Difference]: With dead ends: 78 [2021-01-06 16:06:36,434 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 16:06:36,441 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 16:06:36,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 16:06:36,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-01-06 16:06:36,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 16:06:36,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2021-01-06 16:06:36,492 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 9 [2021-01-06 16:06:36,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:06:36,493 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2021-01-06 16:06:36,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:06:36,494 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2021-01-06 16:06:36,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:06:36,495 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:06:36,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:06:36,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:06:36,496 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:06:36,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:06:36,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1561607263, now seen corresponding path program 1 times [2021-01-06 16:06:36,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:06:36,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577926270] [2021-01-06 16:06:36,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:06:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:06:36,631 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 16:06:36,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577926270] [2021-01-06 16:06:36,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:06:36,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:06:36,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133692209] [2021-01-06 16:06:36,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:06:36,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:06:36,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:06:36,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:06:36,635 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand 3 states. [2021-01-06 16:06:36,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:06:36,674 INFO L93 Difference]: Finished difference Result 71 states and 94 transitions. [2021-01-06 16:06:36,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:06:36,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 16:06:36,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:06:36,676 INFO L225 Difference]: With dead ends: 71 [2021-01-06 16:06:36,676 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 16:06:36,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:06:36,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 16:06:36,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2021-01-06 16:06:36,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 16:06:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2021-01-06 16:06:36,688 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 10 [2021-01-06 16:06:36,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:06:36,688 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2021-01-06 16:06:36,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:06:36,689 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2021-01-06 16:06:36,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:06:36,689 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:06:36,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:06:36,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:06:36,690 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:06:36,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:06:36,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1121717072, now seen corresponding path program 1 times [2021-01-06 16:06:36,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:06:36,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64877411] [2021-01-06 16:06:36,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:06:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:06:36,728 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:06:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:06:36,773 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:06:36,801 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:06:36,801 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:06:36,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:06:36,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:06:36 BoogieIcfgContainer [2021-01-06 16:06:36,840 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:06:36,841 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:06:36,841 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:06:36,841 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:06:36,842 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:06:36" (3/4) ... [2021-01-06 16:06:36,846 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 16:06:36,847 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:06:36,849 INFO L168 Benchmark]: Toolchain (without parser) took 2159.19 ms. Allocated memory is still 153.1 MB. Free memory was 128.6 MB in the beginning and 97.3 MB in the end (delta: 31.3 MB). Peak memory consumption was 30.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:06:36,850 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 132.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:06:36,851 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.76 ms. Allocated memory is still 153.1 MB. Free memory was 128.4 MB in the beginning and 116.9 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:06:36,852 INFO L168 Benchmark]: Boogie Procedure Inliner took 95.15 ms. Allocated memory is still 153.1 MB. Free memory was 116.7 MB in the beginning and 114.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:06:36,853 INFO L168 Benchmark]: Boogie Preprocessor took 89.41 ms. Allocated memory is still 153.1 MB. Free memory was 114.9 MB in the beginning and 113.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:06:36,854 INFO L168 Benchmark]: RCFGBuilder took 890.89 ms. Allocated memory is still 153.1 MB. Free memory was 113.3 MB in the beginning and 128.8 MB in the end (delta: -15.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-01-06 16:06:36,855 INFO L168 Benchmark]: TraceAbstraction took 753.89 ms. Allocated memory is still 153.1 MB. Free memory was 128.3 MB in the beginning and 97.3 MB in the end (delta: 30.9 MB). Peak memory consumption was 31.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:06:36,855 INFO L168 Benchmark]: Witness Printer took 6.21 ms. Allocated memory is still 153.1 MB. Free memory is still 97.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:06:36,860 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 132.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 307.76 ms. Allocated memory is still 153.1 MB. Free memory was 128.4 MB in the beginning and 116.9 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 95.15 ms. Allocated memory is still 153.1 MB. Free memory was 116.7 MB in the beginning and 114.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 89.41 ms. Allocated memory is still 153.1 MB. Free memory was 114.9 MB in the beginning and 113.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 890.89 ms. Allocated memory is still 153.1 MB. Free memory was 113.3 MB in the beginning and 128.8 MB in the end (delta: -15.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 753.89 ms. Allocated memory is still 153.1 MB. Free memory was 128.3 MB in the beginning and 97.3 MB in the end (delta: 30.9 MB). Peak memory consumption was 31.5 MB. Max. memory is 8.0 GB. * Witness Printer took 6.21 ms. Allocated memory is still 153.1 MB. Free memory is still 97.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 98]: 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 15, overapproximation of someBinaryArithmeticFLOAToperation at line 93. Possible FailurePath: [L17] static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L93] float x = 0.0f / 0.0f; [L20] float z; [L21] __uint32_t r, hx; [L22] __int32_t ix, s, q, m, t, i; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (ix) = gf_u.word [L29] hx = ix & 0x7fffffff VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L31] COND FALSE !(!((hx) < 0x7f800000L)) VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L34] COND TRUE ((hx) == 0) [L35] return x; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L94] float res = __ieee754_sqrtf(x); [L15] return x != x; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L97] COND TRUE !isnan_float(res) [L98] reach_error() VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 40 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: 101 SDtfs, 6 SDslu, 40 SDs, 0 SdLazy, 11 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 163 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...