/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_Householder_interval.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:01:51,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:01:51,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:01:51,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:01:51,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:01:51,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:01:51,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:01:51,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:01:51,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:01:51,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:01:51,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:01:51,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:01:51,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:01:51,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:01:51,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:01:51,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:01:51,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:01:51,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:01:51,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:01:51,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:01:51,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:01:51,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:01:51,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:01:51,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:01:51,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:01:51,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:01:51,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:01:51,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:01:51,491 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 16:01:51,546 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:01:51,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:01:51,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:01:51,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:01:51,551 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:01:51,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:01:51,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:01:51,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:01:51,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:01:51,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:01:51,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:01:51,555 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:01:51,555 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:01:51,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:01:51,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:01:51,556 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:01:51,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:01:51,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:01:51,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:01:51,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:01:51,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:01:51,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:01:51,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:01:51,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:01:51,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:01:51,558 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:01:51,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:01:52,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:01:52,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:01:52,010 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:01:52,011 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:01:52,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2021-01-06 16:01:52,104 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/384ef6b13/622a312971304f8fbc335a69176f4dcb/FLAG712bb8d0b [2021-01-06 16:01:52,700 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:01:52,701 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2021-01-06 16:01:52,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/384ef6b13/622a312971304f8fbc335a69176f4dcb/FLAG712bb8d0b [2021-01-06 16:01:53,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/384ef6b13/622a312971304f8fbc335a69176f4dcb [2021-01-06 16:01:53,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:01:53,076 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:01:53,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:01:53,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:01:53,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:01:53,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:01:53" (1/1) ... [2021-01-06 16:01:53,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ea4322f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:53, skipping insertion in model container [2021-01-06 16:01:53,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:01:53" (1/1) ... [2021-01-06 16:01:53,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:01:53,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:01:53,309 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_Householder_interval.c[831,844] left hand side expression in assignment: lhs: VariableLHS[~xn~0,] left hand side expression in assignment: lhs: VariableLHS[~xn~0,] left hand side expression in assignment: lhs: VariableLHS[~xnp1~0,] left hand side expression in assignment: lhs: VariableLHS[~residu~0,] left hand side expression in assignment: lhs: VariableLHS[~lsup~0,] left hand side expression in assignment: lhs: VariableLHS[~linf~0,] left hand side expression in assignment: lhs: VariableLHS[~cond~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~xnp1~0,] left hand side expression in assignment: lhs: VariableLHS[~residu~0,] left hand side expression in assignment: lhs: VariableLHS[~xn~0,] left hand side expression in assignment: lhs: VariableLHS[~lsup~0,] left hand side expression in assignment: lhs: VariableLHS[~linf~0,] left hand side expression in assignment: lhs: VariableLHS[~cond~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2021-01-06 16:01:53,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:01:53,345 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:01:53,360 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_Householder_interval.c[831,844] left hand side expression in assignment: lhs: VariableLHS[~xn~0,] left hand side expression in assignment: lhs: VariableLHS[~xn~0,] left hand side expression in assignment: lhs: VariableLHS[~xnp1~0,] left hand side expression in assignment: lhs: VariableLHS[~residu~0,] left hand side expression in assignment: lhs: VariableLHS[~lsup~0,] left hand side expression in assignment: lhs: VariableLHS[~linf~0,] left hand side expression in assignment: lhs: VariableLHS[~cond~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~xnp1~0,] left hand side expression in assignment: lhs: VariableLHS[~residu~0,] left hand side expression in assignment: lhs: VariableLHS[~xn~0,] left hand side expression in assignment: lhs: VariableLHS[~lsup~0,] left hand side expression in assignment: lhs: VariableLHS[~linf~0,] left hand side expression in assignment: lhs: VariableLHS[~cond~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2021-01-06 16:01:53,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:01:53,398 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:01:53,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:53 WrapperNode [2021-01-06 16:01:53,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:01:53,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:01:53,402 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:01:53,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:01:53,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:53" (1/1) ... [2021-01-06 16:01:53,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:53" (1/1) ... [2021-01-06 16:01:53,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:01:53,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:01:53,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:01:53,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:01:53,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:53" (1/1) ... [2021-01-06 16:01:53,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:53" (1/1) ... [2021-01-06 16:01:53,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:53" (1/1) ... [2021-01-06 16:01:53,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:53" (1/1) ... [2021-01-06 16:01:53,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:53" (1/1) ... [2021-01-06 16:01:53,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:53" (1/1) ... [2021-01-06 16:01:53,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:53" (1/1) ... [2021-01-06 16:01:53,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:01:53,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:01:53,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:01:53,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:01:53,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:53" (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 16:01:53,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:01:53,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:01:53,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:01:53,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:01:54,088 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:01:54,089 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 16:01:54,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:01:54 BoogieIcfgContainer [2021-01-06 16:01:54,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:01:54,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:01:54,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:01:54,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:01:54,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:01:53" (1/3) ... [2021-01-06 16:01:54,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ffb3261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:01:54, skipping insertion in model container [2021-01-06 16:01:54,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:53" (2/3) ... [2021-01-06 16:01:54,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ffb3261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:01:54, skipping insertion in model container [2021-01-06 16:01:54,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:01:54" (3/3) ... [2021-01-06 16:01:54,115 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_interval.c [2021-01-06 16:01:54,128 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:01:54,141 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:01:54,192 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:01:54,224 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:01:54,224 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:01:54,224 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:01:54,224 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:01:54,225 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:01:54,225 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:01:54,225 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:01:54,225 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:01:54,239 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2021-01-06 16:01:54,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:01:54,245 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:54,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:54,246 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:54,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:54,253 INFO L82 PathProgramCache]: Analyzing trace with hash 334453616, now seen corresponding path program 1 times [2021-01-06 16:01:54,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:54,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575088516] [2021-01-06 16:01:54,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:54,428 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 16:01:54,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575088516] [2021-01-06 16:01:54,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:01:54,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:01:54,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645427733] [2021-01-06 16:01:54,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:01:54,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:54,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:01:54,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:01:54,454 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2021-01-06 16:01:54,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:54,473 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-01-06 16:01:54,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:01:54,475 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 16:01:54,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:54,485 INFO L225 Difference]: With dead ends: 29 [2021-01-06 16:01:54,485 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:01:54,488 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 16:01:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:01:54,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 16:01:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 16:01:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-01-06 16:01:54,523 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 11 [2021-01-06 16:01:54,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:54,523 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-01-06 16:01:54,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:01:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-01-06 16:01:54,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:01:54,525 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:54,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:54,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:01:54,526 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:54,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:54,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1014511986, now seen corresponding path program 1 times [2021-01-06 16:01:54,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:54,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331845257] [2021-01-06 16:01:54,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:01:54,566 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:01:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:01:54,591 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:01:54,624 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:01:54,624 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:01:54,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:01:54,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:01:54 BoogieIcfgContainer [2021-01-06 16:01:54,677 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:01:54,677 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:01:54,678 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:01:54,678 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:01:54,678 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:01:54" (3/4) ... [2021-01-06 16:01:54,682 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 16:01:54,682 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:01:54,687 INFO L168 Benchmark]: Toolchain (without parser) took 1608.31 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 77.3 MB in the end (delta: 48.6 MB). Peak memory consumption was 48.2 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:54,689 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory was 124.3 MB in the beginning and 124.2 MB in the end (delta: 99.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:01:54,691 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.54 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 115.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:54,693 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.36 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 113.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:54,694 INFO L168 Benchmark]: Boogie Preprocessor took 61.76 ms. Allocated memory is still 151.0 MB. Free memory was 113.7 MB in the beginning and 112.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:54,695 INFO L168 Benchmark]: RCFGBuilder took 575.70 ms. Allocated memory is still 151.0 MB. Free memory was 112.5 MB in the beginning and 99.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:54,696 INFO L168 Benchmark]: TraceAbstraction took 579.27 ms. Allocated memory is still 151.0 MB. Free memory was 98.7 MB in the beginning and 77.6 MB in the end (delta: 21.2 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:54,698 INFO L168 Benchmark]: Witness Printer took 5.07 ms. Allocated memory is still 151.0 MB. Free memory was 77.4 MB in the beginning and 77.3 MB in the end (delta: 173.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:01:54,716 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 was 124.3 MB in the beginning and 124.2 MB in the end (delta: 99.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 323.54 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 115.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 54.36 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 113.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 61.76 ms. Allocated memory is still 151.0 MB. Free memory was 113.7 MB in the beginning and 112.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 575.70 ms. Allocated memory is still 151.0 MB. Free memory was 112.5 MB in the beginning and 99.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 579.27 ms. Allocated memory is still 151.0 MB. Free memory was 98.7 MB in the beginning and 77.6 MB in the end (delta: 21.2 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Witness Printer took 5.07 ms. Allocated memory is still 151.0 MB. Free memory was 77.4 MB in the beginning and 77.3 MB in the end (delta: 173.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 56, overapproximation of someUnaryDOUBLEoperation at line 32, overapproximation of someBinaryArithmeticDOUBLEoperation at line 44. Possible FailurePath: [L22] double _EPS = 1e-6; VAL [_EPS=1/1000000] [L49] double d, r; [L51] d = __VERIFIER_nondet_double() [L18] COND FALSE !(!cond) VAL [_EPS=1/1000000] [L26] double xn, xnp1, residu, lsup, linf; [L27] int i, cond; VAL [_EPS=1/1000000] [L28] COND TRUE Input <= 1.0 [L28] xn = 1.0 VAL [_EPS=1/1000000] [L29] xnp1 = xn [L30] residu = 2.0*_EPS*(xn+xnp1) [L31] lsup = _EPS * (xn+xnp1) [L32] linf = -lsup [L33] cond = ((residu > lsup) || (residu < linf)) [L34] i = 0 VAL [_EPS=1/1000000] [L35] COND FALSE !(\read(cond)) VAL [_EPS=1/1000000] [L44] return 1.0 / xnp1; VAL [_EPS=1/1000000] [L54] r = SqrtR(d) [L20] COND TRUE !(cond) VAL [_EPS=1/1000000] [L20] reach_error() VAL [_EPS=1/1000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 100 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...