/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-dev-4f750a8 [2020-12-22 03:42:21,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:42:21,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:42:21,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 03:42:21,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:42:21,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:42:21,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:42:21,769 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:42:21,796 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:42:21,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:42:21,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:42:21,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:42:21,798 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:42:21,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:42:21,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:42:21,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:42:21,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:42:21,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:42:21,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:42:21,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:42:21,800 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:42:21,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:42:21,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:42:21,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:42:21,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:42:21,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:42:21,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:42:21,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:42:21,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:42:21,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:42:21,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:42:21,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:42:21,802 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:42:21,803 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:42:22,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:42:22,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:42:22,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:42:22,224 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:42:22,225 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:42:22,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c [2020-12-22 03:42:22,309 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df39ec5ea/5548565c33cb4022b4f03d16a078cc9a/FLAG295f74f22 [2020-12-22 03:42:22,885 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:42:22,886 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c [2020-12-22 03:42:22,894 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df39ec5ea/5548565c33cb4022b4f03d16a078cc9a/FLAG295f74f22 [2020-12-22 03:42:23,270 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df39ec5ea/5548565c33cb4022b4f03d16a078cc9a [2020-12-22 03:42:23,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:42:23,276 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:42:23,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:42:23,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:42:23,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:42:23,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:42:23" (1/1) ... [2020-12-22 03:42:23,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@583c727a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:23, skipping insertion in model container [2020-12-22 03:42:23,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:42:23" (1/1) ... [2020-12-22 03:42:23,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:42:23,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:42:23,515 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_Householder_pseudoconstant.c[855,868] [2020-12-22 03:42:23,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:42:23,549 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:42:23,564 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_Householder_pseudoconstant.c[855,868] [2020-12-22 03:42:23,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:42:23,602 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:42:23,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:23 WrapperNode [2020-12-22 03:42:23,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:42:23,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:42:23,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:42:23,604 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:42:23,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:23" (1/1) ... [2020-12-22 03:42:23,622 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:23" (1/1) ... [2020-12-22 03:42:23,646 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:42:23,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:42:23,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:42:23,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:42:23,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:23" (1/1) ... [2020-12-22 03:42:23,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:23" (1/1) ... [2020-12-22 03:42:23,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:23" (1/1) ... [2020-12-22 03:42:23,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:23" (1/1) ... [2020-12-22 03:42:23,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:23" (1/1) ... [2020-12-22 03:42:23,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:23" (1/1) ... [2020-12-22 03:42:23,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:23" (1/1) ... [2020-12-22 03:42:23,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:42:23,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:42:23,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:42:23,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:42:23,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:23" (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 03:42:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:42:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:42:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:42:23,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:42:24,042 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:42:24,043 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-22 03:42:24,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:42:24 BoogieIcfgContainer [2020-12-22 03:42:24,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:42:24,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:42:24,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:42:24,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:42:24,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:42:23" (1/3) ... [2020-12-22 03:42:24,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d78e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:42:24, skipping insertion in model container [2020-12-22 03:42:24,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:23" (2/3) ... [2020-12-22 03:42:24,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d78e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:42:24, skipping insertion in model container [2020-12-22 03:42:24,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:42:24" (3/3) ... [2020-12-22 03:42:24,076 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_pseudoconstant.c [2020-12-22 03:42:24,083 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:42:24,087 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:42:24,118 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:42:24,162 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:42:24,162 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:42:24,163 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:42:24,163 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:42:24,163 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:42:24,163 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:42:24,163 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:42:24,163 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:42:24,178 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-22 03:42:24,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 03:42:24,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:24,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:24,185 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:24,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:24,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1569195288, now seen corresponding path program 1 times [2020-12-22 03:42:24,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:24,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622724884] [2020-12-22 03:42:24,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:24,371 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 03:42:24,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622724884] [2020-12-22 03:42:24,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:42:24,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:42:24,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549690643] [2020-12-22 03:42:24,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 03:42:24,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:24,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 03:42:24,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:42:24,399 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-12-22 03:42:24,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:24,419 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2020-12-22 03:42:24,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 03:42:24,421 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-22 03:42:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:24,431 INFO L225 Difference]: With dead ends: 34 [2020-12-22 03:42:24,432 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 03:42:24,435 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 03:42:24,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 03:42:24,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 03:42:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 03:42:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-22 03:42:24,473 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2020-12-22 03:42:24,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:24,473 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-22 03:42:24,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 03:42:24,474 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-22 03:42:24,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 03:42:24,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:24,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:24,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:42:24,475 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:24,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2049407722, now seen corresponding path program 1 times [2020-12-22 03:42:24,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:24,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856846354] [2020-12-22 03:42:24,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:42:24,517 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:42:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:42:24,543 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:42:24,571 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:42:24,572 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:42:24,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:42:24,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:42:24 BoogieIcfgContainer [2020-12-22 03:42:24,611 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:42:24,612 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:42:24,612 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:42:24,612 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:42:24,612 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:42:24" (3/4) ... [2020-12-22 03:42:24,616 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 03:42:24,616 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:42:24,619 INFO L168 Benchmark]: Toolchain (without parser) took 1342.21 ms. Allocated memory is still 180.4 MB. Free memory was 154.5 MB in the beginning and 140.0 MB in the end (delta: 14.5 MB). Peak memory consumption was 13.8 MB. Max. memory is 8.0 GB. [2020-12-22 03:42:24,620 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 180.4 MB. Free memory was 152.8 MB in the beginning and 152.7 MB in the end (delta: 82.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:42:24,621 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.38 ms. Allocated memory is still 180.4 MB. Free memory was 154.4 MB in the beginning and 143.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 03:42:24,622 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.18 ms. Allocated memory is still 180.4 MB. Free memory was 143.9 MB in the beginning and 142.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:42:24,623 INFO L168 Benchmark]: Boogie Preprocessor took 28.37 ms. Allocated memory is still 180.4 MB. Free memory was 142.4 MB in the beginning and 141.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:42:24,624 INFO L168 Benchmark]: RCFGBuilder took 383.95 ms. Allocated memory is still 180.4 MB. Free memory was 141.2 MB in the beginning and 162.5 MB in the end (delta: -21.3 MB). Peak memory consumption was 18.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:42:24,624 INFO L168 Benchmark]: TraceAbstraction took 548.85 ms. Allocated memory is still 180.4 MB. Free memory was 162.5 MB in the beginning and 140.0 MB in the end (delta: 22.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:42:24,625 INFO L168 Benchmark]: Witness Printer took 4.87 ms. Allocated memory is still 180.4 MB. Free memory is still 140.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:42:24,630 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 180.4 MB. Free memory was 152.8 MB in the beginning and 152.7 MB in the end (delta: 82.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 325.38 ms. Allocated memory is still 180.4 MB. Free memory was 154.4 MB in the beginning and 143.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 42.18 ms. Allocated memory is still 180.4 MB. Free memory was 143.9 MB in the beginning and 142.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.37 ms. Allocated memory is still 180.4 MB. Free memory was 142.4 MB in the beginning and 141.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 383.95 ms. Allocated memory is still 180.4 MB. Free memory was 141.2 MB in the beginning and 162.5 MB in the end (delta: -21.3 MB). Peak memory consumption was 18.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 548.85 ms. Allocated memory is still 180.4 MB. Free memory was 162.5 MB in the beginning and 140.0 MB in the end (delta: 22.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Witness Printer took 4.87 ms. Allocated memory is still 180.4 MB. Free memory is still 140.0 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: 0.4s, 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, 0.0s 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...