/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_pseudoconstant.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:01:53,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:01:53,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:01:53,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:01:53,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:01:53,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:01:53,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:01:53,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:01:53,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:01:53,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:01:53,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:01:53,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:01:53,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:01:53,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:01:53,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:01:53,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:01:53,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:01:53,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:01:53,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:01:53,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:01:53,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:01:53,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:01:53,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:01:53,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:01:53,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:01:53,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:01:53,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:01:53,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:01:53,148 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 16:01:53,175 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:01:53,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:01:53,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:01:53,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:01:53,178 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:01:53,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:01:53,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:01:53,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:01:53,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:01:53,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:01:53,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:01:53,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:01:53,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:01:53,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:01:53,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:01:53,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:01:53,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:01:53,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:01:53,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:01:53,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:01:53,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:01:53,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:01:53,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:01:53,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:01:53,183 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:01:53,183 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:01:53,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:01:53,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:01:53,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:01:53,575 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:01:53,575 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:01:53,576 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c [2021-01-06 16:01:53,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d70189cf9/cdb283a308cb4e8185bb60fbff585685/FLAG9559c0f03 [2021-01-06 16:01:54,290 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:01:54,291 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c [2021-01-06 16:01:54,300 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d70189cf9/cdb283a308cb4e8185bb60fbff585685/FLAG9559c0f03 [2021-01-06 16:01:54,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d70189cf9/cdb283a308cb4e8185bb60fbff585685 [2021-01-06 16:01:54,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:01:54,635 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:01:54,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:01:54,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:01:54,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:01:54,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:01:54" (1/1) ... [2021-01-06 16:01:54,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a92882f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:54, skipping insertion in model container [2021-01-06 16:01:54,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:01:54" (1/1) ... [2021-01-06 16:01:54,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:01:54,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:01:54,810 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_pseudoconstant.c[855,868] 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[~dd~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2021-01-06 16:01:54,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:01:54,849 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:01:54,865 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_pseudoconstant.c[855,868] 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[~dd~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2021-01-06 16:01:54,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:01:54,894 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:01:54,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:54 WrapperNode [2021-01-06 16:01:54,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:01:54,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:01:54,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:01:54,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:01:54,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:54" (1/1) ... [2021-01-06 16:01:54,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:54" (1/1) ... [2021-01-06 16:01:54,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:01:54,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:01:54,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:01:54,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:01:54,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:54" (1/1) ... [2021-01-06 16:01:54,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:54" (1/1) ... [2021-01-06 16:01:54,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:54" (1/1) ... [2021-01-06 16:01:54,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:54" (1/1) ... [2021-01-06 16:01:54,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:54" (1/1) ... [2021-01-06 16:01:54,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:54" (1/1) ... [2021-01-06 16:01:54,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:54" (1/1) ... [2021-01-06 16:01:54,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:01:54,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:01:54,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:01:54,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:01:54,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:54" (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 16:01:55,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:01:55,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:01:55,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:01:55,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:01:55,525 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:01:55,526 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-01-06 16:01:55,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:01:55 BoogieIcfgContainer [2021-01-06 16:01:55,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:01:55,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:01:55,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:01:55,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:01:55,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:01:54" (1/3) ... [2021-01-06 16:01:55,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7923570b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:01:55, skipping insertion in model container [2021-01-06 16:01:55,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:54" (2/3) ... [2021-01-06 16:01:55,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7923570b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:01:55, skipping insertion in model container [2021-01-06 16:01:55,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:01:55" (3/3) ... [2021-01-06 16:01:55,537 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_pseudoconstant.c [2021-01-06 16:01:55,546 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:01:55,553 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:01:55,608 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:01:55,675 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:01:55,676 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:01:55,676 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:01:55,676 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:01:55,676 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:01:55,677 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:01:55,677 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:01:55,677 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:01:55,711 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-01-06 16:01:55,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:01:55,717 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:55,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:55,719 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:55,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:55,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1569195288, now seen corresponding path program 1 times [2021-01-06 16:01:55,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:55,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114121481] [2021-01-06 16:01:55,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:55,960 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 16:01:55,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114121481] [2021-01-06 16:01:55,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:01:55,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:01:55,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285955311] [2021-01-06 16:01:55,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:01:55,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:55,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:01:55,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:01:55,994 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2021-01-06 16:01:56,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:56,017 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-01-06 16:01:56,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:01:56,019 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2021-01-06 16:01:56,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:56,045 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:01:56,046 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 16:01:56,050 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 16:01:56,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 16:01:56,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 16:01:56,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:01:56,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-01-06 16:01:56,088 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2021-01-06 16:01:56,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:56,089 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-01-06 16:01:56,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:01:56,090 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-01-06 16:01:56,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:01:56,090 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:56,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:56,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:01:56,092 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:56,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:56,097 INFO L82 PathProgramCache]: Analyzing trace with hash -2049407722, now seen corresponding path program 1 times [2021-01-06 16:01:56,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:56,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749980039] [2021-01-06 16:01:56,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:01:56,175 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:01:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:01:56,222 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:01:56,262 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:01:56,262 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:01:56,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:01:56,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:01:56 BoogieIcfgContainer [2021-01-06 16:01:56,314 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:01:56,315 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:01:56,315 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:01:56,315 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:01:56,316 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:01:55" (3/4) ... [2021-01-06 16:01:56,320 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 16:01:56,320 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:01:56,324 INFO L168 Benchmark]: Toolchain (without parser) took 1687.07 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 111.8 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:56,326 INFO L168 Benchmark]: CDTParser took 0.19 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. [2021-01-06 16:01:56,328 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.54 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 115.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:56,329 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.66 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 113.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:56,330 INFO L168 Benchmark]: Boogie Preprocessor took 26.52 ms. Allocated memory is still 151.0 MB. Free memory was 113.4 MB in the beginning and 112.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:56,332 INFO L168 Benchmark]: RCFGBuilder took 562.25 ms. Allocated memory is still 151.0 MB. Free memory was 112.4 MB in the beginning and 98.5 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:56,333 INFO L168 Benchmark]: TraceAbstraction took 784.50 ms. Allocated memory is still 151.0 MB. Free memory was 98.1 MB in the beginning and 111.8 MB in the end (delta: -13.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:01:56,333 INFO L168 Benchmark]: Witness Printer took 5.39 ms. Allocated memory is still 151.0 MB. Free memory is still 111.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:01:56,351 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 151.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 258.54 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 115.2 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 41.66 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 113.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.52 ms. Allocated memory is still 151.0 MB. Free memory was 113.4 MB in the beginning and 112.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 562.25 ms. Allocated memory is still 151.0 MB. Free memory was 112.4 MB in the beginning and 98.5 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 784.50 ms. Allocated memory is still 151.0 MB. Free memory was 98.1 MB in the beginning and 111.8 MB in the end (delta: -13.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 5.39 ms. Allocated memory is still 151.0 MB. Free memory is still 111.8 MB. 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 59, 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, dd, r; [L50] double epsilon = 1e-8; [L52] d = 1. VAL [_EPS=1/1000000] [L52] COND TRUE d <= 20. [L54] dd = __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] [L57] r = SqrtR(dd) [L20] COND TRUE !(cond) VAL [_EPS=1/1000000] [L20] reach_error() VAL [_EPS=1/1000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 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=18occurred 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, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 121 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...