/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-benchs/sqrt_poly2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:07:33,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:07:33,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:07:33,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:07:33,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:07:33,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:07:33,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:07:33,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:07:33,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:07:33,864 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:07:33,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:07:33,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:07:33,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:07:33,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:07:33,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:07:33,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:07:33,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:07:33,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:07:33,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:07:33,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:07:33,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:07:33,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:07:33,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:07:33,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:07:33,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:07:33,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:07:33,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:07:33,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:07:33,933 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:07:33,984 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:07:33,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:07:33,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:07:33,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:07:33,988 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:07:33,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:07:33,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:07:33,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:07:33,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:07:33,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:07:33,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:07:33,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:07:33,990 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:07:33,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:07:33,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:07:33,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:07:33,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:07:33,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:07:33,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:07:33,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:07:33,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:07:33,992 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:07:33,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:07:33,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:07:33,993 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:07:33,993 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:07:34,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:07:34,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:07:34,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:07:34,464 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:07:34,465 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:07:34,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-12-23 06:07:34,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c314b5040/5bb04f706d7e4a10b2cb2a96df79f045/FLAG41bb914b9 [2020-12-23 06:07:35,328 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:07:35,330 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-12-23 06:07:35,341 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c314b5040/5bb04f706d7e4a10b2cb2a96df79f045/FLAG41bb914b9 [2020-12-23 06:07:35,663 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c314b5040/5bb04f706d7e4a10b2cb2a96df79f045 [2020-12-23 06:07:35,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:07:35,668 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:07:35,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:07:35,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:07:35,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:07:35,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:07:35" (1/1) ... [2020-12-23 06:07:35,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34d1aa54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:35, skipping insertion in model container [2020-12-23 06:07:35,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:07:35" (1/1) ... [2020-12-23 06:07:35,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:07:35,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:07:35,872 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-benchs/sqrt_poly2.c[587,600] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~x~0,],d] left hand side expression in assignment: lhs: VariableLHS[~exp~0,] left hand side expression in assignment: lhs: ArrayLHS[StructLHS[VariableLHS[~x~0,],i],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: ArrayLHS[StructLHS[VariableLHS[~x~0,],i],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~x~1,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 06:07:35,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:07:35,916 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:07:35,932 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-benchs/sqrt_poly2.c[587,600] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~exp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~x~1,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 06:07:35,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:07:35,966 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:07:35,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:35 WrapperNode [2020-12-23 06:07:35,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:07:35,971 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:07:35,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:07:35,972 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:07:35,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:35" (1/1) ... [2020-12-23 06:07:36,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:35" (1/1) ... [2020-12-23 06:07:36,044 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:07:36,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:07:36,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:07:36,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:07:36,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:35" (1/1) ... [2020-12-23 06:07:36,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:35" (1/1) ... [2020-12-23 06:07:36,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:35" (1/1) ... [2020-12-23 06:07:36,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:35" (1/1) ... [2020-12-23 06:07:36,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:35" (1/1) ... [2020-12-23 06:07:36,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:35" (1/1) ... [2020-12-23 06:07:36,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:35" (1/1) ... [2020-12-23 06:07:36,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:07:36,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:07:36,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:07:36,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:07:36,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:35" (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 [2020-12-23 06:07:36,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:07:36,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:07:36,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-12-23 06:07:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 06:07:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-23 06:07:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:07:36,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:07:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 06:07:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 06:07:36,584 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:07:36,584 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 06:07:36,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:07:36 BoogieIcfgContainer [2020-12-23 06:07:36,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:07:36,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:07:36,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:07:36,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:07:36,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:07:35" (1/3) ... [2020-12-23 06:07:36,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a39c45f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:07:36, skipping insertion in model container [2020-12-23 06:07:36,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:35" (2/3) ... [2020-12-23 06:07:36,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a39c45f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:07:36, skipping insertion in model container [2020-12-23 06:07:36,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:07:36" (3/3) ... [2020-12-23 06:07:36,596 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-12-23 06:07:36,603 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:07:36,607 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:07:36,627 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:07:36,657 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:07:36,657 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:07:36,657 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:07:36,657 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:07:36,658 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:07:36,658 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:07:36,658 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:07:36,658 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:07:36,676 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-23 06:07:36,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 06:07:36,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:36,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:36,685 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:36,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:36,694 INFO L82 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2020-12-23 06:07:36,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:36,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754318326] [2020-12-23 06:07:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:36,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754318326] [2020-12-23 06:07:36,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:07:36,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:07:36,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013683605] [2020-12-23 06:07:36,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:07:36,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:36,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:07:37,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:07:37,003 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2020-12-23 06:07:37,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:37,021 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-23 06:07:37,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:07:37,022 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-23 06:07:37,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:37,032 INFO L225 Difference]: With dead ends: 25 [2020-12-23 06:07:37,033 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 06:07:37,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:07:37,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 06:07:37,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 06:07:37,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 06:07:37,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-23 06:07:37,076 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2020-12-23 06:07:37,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:37,077 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-23 06:07:37,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:07:37,077 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-23 06:07:37,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 06:07:37,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:37,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:37,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:07:37,079 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:37,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:37,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2020-12-23 06:07:37,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:37,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872170980] [2020-12-23 06:07:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:07:37,208 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:07:37,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:07:37,324 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:07:37,351 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 06:07:37,352 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 06:07:37,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:07:37,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:07:37 BoogieIcfgContainer [2020-12-23 06:07:37,404 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:07:37,405 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:07:37,405 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:07:37,405 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:07:37,406 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:07:36" (3/4) ... [2020-12-23 06:07:37,409 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 06:07:37,410 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:07:37,412 INFO L168 Benchmark]: Toolchain (without parser) took 1743.45 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 127.2 MB in the end (delta: -826.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:07:37,413 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:07:37,414 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.61 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 115.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:07:37,415 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.02 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 113.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:07:37,416 INFO L168 Benchmark]: Boogie Preprocessor took 63.52 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 112.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:07:37,416 INFO L168 Benchmark]: RCFGBuilder took 473.90 ms. Allocated memory is still 151.0 MB. Free memory was 112.5 MB in the beginning and 97.5 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-12-23 06:07:37,417 INFO L168 Benchmark]: TraceAbstraction took 815.77 ms. Allocated memory is still 151.0 MB. Free memory was 97.0 MB in the beginning and 127.7 MB in the end (delta: -30.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:07:37,418 INFO L168 Benchmark]: Witness Printer took 5.12 ms. Allocated memory is still 151.0 MB. Free memory was 127.7 MB in the beginning and 127.2 MB in the end (delta: 528.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:07:37,427 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 297.61 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 115.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 75.02 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 113.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 63.52 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 112.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 473.90 ms. Allocated memory is still 151.0 MB. Free memory was 112.5 MB in the beginning and 97.5 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 815.77 ms. Allocated memory is still 151.0 MB. Free memory was 97.0 MB in the beginning and 127.7 MB in the end (delta: -30.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 5.12 ms. Allocated memory is still 151.0 MB. Free memory was 127.7 MB in the beginning and 127.2 MB in the end (delta: 528.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 38, overapproximation of someUnaryDOUBLEoperation at line 20, overapproximation of someBinaryArithmeticDOUBLEoperation at line 51, overapproximation of bitwiseAnd at line 37, overapproximation of someBinaryDOUBLEComparisonOperation at line 65. Possible FailurePath: [L17] double C0 = 1.414213538; [L18] double C1 = 0.229761391; [L19] double C2 = 1.296735525; [L20] double C3 = -0.901098370; [L21] double C4 = 0.493553400; [L22] double C5 = -0.118958666; VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L58] double x,y; [L60] x = __VERIFIER_nondet_double() [L12] COND FALSE !(!cond) VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L31] union u x; [L32] double r; [L33] int exp; [L35] x.d = a [L37] EXPR x.i[0] [L37] exp = (x.i[0] & 0x7FF00000) >> 20 [L38] EXPR x.i[0] [L38] x.i[0] = (x.i[0] & 0x800FFFFF) | 0x3FF00000 [L39] EXPR x.d [L39] r = x.d * 0.5 [L41] r = C1+C2+(C3+(C4+C5*r)*r)*r VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L43] COND TRUE exp % 2 == 0 [L44] exp++ VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L50] x.i[0] = (exp/2 + 511) << 20 [L51] EXPR x.d [L51] r = r * x.d [L53] return r; [L53] return r; VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L63] y = sqrt_custom(x) [L14] COND TRUE !(cond) VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L14] reach_error() VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 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=14occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 64 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...