/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-dev-4f750a8 [2020-12-22 03:42:27,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:42:27,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:42:27,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 03:42:27,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 03:42:27,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 03:42:27,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 03:42:27,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 03:42:27,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 03:42:27,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 03:42:27,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 03:42:27,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 03:42:27,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 03:42:27,148 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 03:42:27,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 03:42:27,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 03:42:27,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 03:42:27,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 03:42:27,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 03:42:27,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 03:42:27,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 03:42:27,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 03:42:27,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 03:42:27,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 03:42:27,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 03:42:27,194 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 03:42:27,194 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 03:42:27,196 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 03:42:27,197 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 03:42:27,198 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 03:42:27,198 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 03:42:27,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 03:42:27,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 03:42:27,202 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 03:42:27,203 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 03:42:27,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 03:42:27,204 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 03:42:27,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 03:42:27,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:42:27,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:42:27,206 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:42:27,211 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:42:27,249 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:42:27,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:42:27,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:42:27,251 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:42:27,251 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:42:27,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:42:27,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:42:27,252 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:42:27,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:42:27,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:42:27,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:42:27,253 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:42:27,253 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:42:27,253 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:42:27,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:42:27,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:42:27,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:42:27,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:42:27,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:42:27,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:42:27,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:42:27,255 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:42:27,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:42:27,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:42:27,255 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:42:27,255 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:42:27,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:42:27,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:42:27,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:42:27,724 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:42:27,724 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:42:27,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-12-22 03:42:27,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/666dda723/6c9738f9851340f1b075029ec8424c1b/FLAG5ac85bf6b [2020-12-22 03:42:28,375 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:42:28,376 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-12-22 03:42:28,384 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/666dda723/6c9738f9851340f1b075029ec8424c1b/FLAG5ac85bf6b [2020-12-22 03:42:28,750 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/666dda723/6c9738f9851340f1b075029ec8424c1b [2020-12-22 03:42:28,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:42:28,756 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:42:28,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:42:28,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:42:28,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:42:28,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:42:28" (1/1) ... [2020-12-22 03:42:28,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9afaab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:28, skipping insertion in model container [2020-12-22 03:42:28,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:42:28" (1/1) ... [2020-12-22 03:42:28,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:42:28,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:42:28,972 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/sqrt_poly2.c[587,600] [2020-12-22 03:42:29,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:42:29,037 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:42:29,049 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/sqrt_poly2.c[587,600] [2020-12-22 03:42:29,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:42:29,082 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:42:29,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:29 WrapperNode [2020-12-22 03:42:29,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:42:29,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:42:29,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:42:29,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:42:29,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:29" (1/1) ... [2020-12-22 03:42:29,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:29" (1/1) ... [2020-12-22 03:42:29,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:42:29,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:42:29,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:42:29,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:42:29,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:29" (1/1) ... [2020-12-22 03:42:29,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:29" (1/1) ... [2020-12-22 03:42:29,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:29" (1/1) ... [2020-12-22 03:42:29,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:29" (1/1) ... [2020-12-22 03:42:29,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:29" (1/1) ... [2020-12-22 03:42:29,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:29" (1/1) ... [2020-12-22 03:42:29,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:29" (1/1) ... [2020-12-22 03:42:29,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:42:29,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:42:29,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:42:29,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:42:29,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:29,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:42:29,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:42:29,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-12-22 03:42:29,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 03:42:29,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-22 03:42:29,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:42:29,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:42:29,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 03:42:29,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 03:42:29,648 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:42:29,649 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-22 03:42:29,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:42:29 BoogieIcfgContainer [2020-12-22 03:42:29,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:42:29,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:42:29,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:42:29,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:42:29,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:42:28" (1/3) ... [2020-12-22 03:42:29,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f123217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:42:29, skipping insertion in model container [2020-12-22 03:42:29,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:29" (2/3) ... [2020-12-22 03:42:29,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f123217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:42:29, skipping insertion in model container [2020-12-22 03:42:29,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:42:29" (3/3) ... [2020-12-22 03:42:29,697 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-12-22 03:42:29,705 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:42:29,710 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:42:29,734 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:42:29,766 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:42:29,766 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:42:29,767 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:42:29,767 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:42:29,767 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:42:29,767 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:42:29,767 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:42:29,768 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:42:29,796 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-22 03:42:29,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 03:42:29,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:29,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:29,805 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:29,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:29,814 INFO L82 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2020-12-22 03:42:29,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:29,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418876578] [2020-12-22 03:42:29,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:30,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418876578] [2020-12-22 03:42:30,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:42:30,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:42:30,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249986375] [2020-12-22 03:42:30,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 03:42:30,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:30,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 03:42:30,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:42:30,111 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2020-12-22 03:42:30,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:30,129 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-22 03:42:30,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 03:42:30,131 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-22 03:42:30,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:30,159 INFO L225 Difference]: With dead ends: 25 [2020-12-22 03:42:30,159 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 03:42:30,163 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 [2020-12-22 03:42:30,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 03:42:30,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-22 03:42:30,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 03:42:30,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-22 03:42:30,211 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2020-12-22 03:42:30,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:30,211 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-22 03:42:30,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 03:42:30,213 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-22 03:42:30,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 03:42:30,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:30,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:30,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:42:30,216 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:30,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:30,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2020-12-22 03:42:30,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:30,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657336651] [2020-12-22 03:42:30,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:30,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:42:30,395 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:42:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:42:30,515 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:42:30,545 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:42:30,545 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:42:30,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:42:30,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:42:30 BoogieIcfgContainer [2020-12-22 03:42:30,585 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:42:30,585 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:42:30,586 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:42:30,586 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:42:30,586 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:42:29" (3/4) ... [2020-12-22 03:42:30,590 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 03:42:30,590 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:42:30,593 INFO L168 Benchmark]: Toolchain (without parser) took 1836.06 ms. Allocated memory is still 154.1 MB. Free memory was 128.8 MB in the beginning and 111.7 MB in the end (delta: 17.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:42:30,594 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 154.1 MB. Free memory was 126.8 MB in the beginning and 126.6 MB in the end (delta: 210.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:42:30,595 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.61 ms. Allocated memory is still 154.1 MB. Free memory was 128.6 MB in the beginning and 118.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 03:42:30,596 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.81 ms. Allocated memory is still 154.1 MB. Free memory was 118.1 MB in the beginning and 116.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:42:30,597 INFO L168 Benchmark]: Boogie Preprocessor took 40.90 ms. Allocated memory is still 154.1 MB. Free memory was 116.4 MB in the beginning and 115.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:42:30,597 INFO L168 Benchmark]: RCFGBuilder took 515.78 ms. Allocated memory is still 154.1 MB. Free memory was 115.1 MB in the beginning and 137.0 MB in the end (delta: -21.8 MB). Peak memory consumption was 20.2 MB. Max. memory is 8.0 GB. [2020-12-22 03:42:30,598 INFO L168 Benchmark]: TraceAbstraction took 895.58 ms. Allocated memory is still 154.1 MB. Free memory was 137.0 MB in the beginning and 112.1 MB in the end (delta: 24.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 8.0 GB. [2020-12-22 03:42:30,599 INFO L168 Benchmark]: Witness Printer took 5.06 ms. Allocated memory is still 154.1 MB. Free memory is still 111.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:42:30,603 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 154.1 MB. Free memory was 126.8 MB in the beginning and 126.6 MB in the end (delta: 210.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 323.61 ms. Allocated memory is still 154.1 MB. Free memory was 128.6 MB in the beginning and 118.1 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 43.81 ms. Allocated memory is still 154.1 MB. Free memory was 118.1 MB in the beginning and 116.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.90 ms. Allocated memory is still 154.1 MB. Free memory was 116.4 MB in the beginning and 115.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 515.78 ms. Allocated memory is still 154.1 MB. Free memory was 115.1 MB in the beginning and 137.0 MB in the end (delta: -21.8 MB). Peak memory consumption was 20.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 895.58 ms. Allocated memory is still 154.1 MB. Free memory was 137.0 MB in the beginning and 112.1 MB in the end (delta: 24.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 8.0 GB. * Witness Printer took 5.06 ms. Allocated memory is still 154.1 MB. Free memory is still 111.7 MB. There was no memory consumed. 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, 0.2s 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...