/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/arctan_Pade.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:41:14,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:41:14,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:41:14,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 03:41:14,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 03:41:14,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 03:41:14,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 03:41:14,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 03:41:14,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 03:41:14,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 03:41:14,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 03:41:14,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 03:41:14,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 03:41:14,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 03:41:14,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 03:41:14,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 03:41:14,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 03:41:14,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 03:41:14,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 03:41:14,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 03:41:14,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 03:41:14,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 03:41:14,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 03:41:14,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 03:41:14,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 03:41:14,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:41:14,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:41:14,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:41:14,676 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:41:14,725 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:41:14,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:41:14,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:41:14,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:41:14,731 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:41:14,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:41:14,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:41:14,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:41:14,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:41:14,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:41:14,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:41:14,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:41:14,733 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:41:14,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:41:14,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:41:14,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:41:14,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:41:14,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:41:14,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:41:14,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:41:14,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:41:14,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:41:14,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:41:14,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:41:14,736 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:41:14,736 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:41:15,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:41:15,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:41:15,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:41:15,148 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:41:15,148 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:41:15,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/arctan_Pade.c [2020-12-22 03:41:15,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71f3460c1/4c05374c3dc94d0ea1c93f5ace6ddca3/FLAG477efba68 [2020-12-22 03:41:15,859 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:41:15,859 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/arctan_Pade.c [2020-12-22 03:41:15,867 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71f3460c1/4c05374c3dc94d0ea1c93f5ace6ddca3/FLAG477efba68 [2020-12-22 03:41:16,197 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71f3460c1/4c05374c3dc94d0ea1c93f5ace6ddca3 [2020-12-22 03:41:16,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:41:16,202 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:41:16,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:41:16,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:41:16,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:41:16,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:41:16" (1/1) ... [2020-12-22 03:41:16,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e703890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:16, skipping insertion in model container [2020-12-22 03:41:16,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:41:16" (1/1) ... [2020-12-22 03:41:16,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:41:16,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:41:16,380 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/arctan_Pade.c[665,678] [2020-12-22 03:41:16,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:41:16,408 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:41:16,423 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/arctan_Pade.c[665,678] [2020-12-22 03:41:16,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:41:16,446 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:41:16,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:16 WrapperNode [2020-12-22 03:41:16,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:41:16,448 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:41:16,448 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:41:16,449 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:41:16,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:16" (1/1) ... [2020-12-22 03:41:16,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:16" (1/1) ... [2020-12-22 03:41:16,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:41:16,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:41:16,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:41:16,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:41:16,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:16" (1/1) ... [2020-12-22 03:41:16,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:16" (1/1) ... [2020-12-22 03:41:16,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:16" (1/1) ... [2020-12-22 03:41:16,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:16" (1/1) ... [2020-12-22 03:41:16,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:16" (1/1) ... [2020-12-22 03:41:16,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:16" (1/1) ... [2020-12-22 03:41:16,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:16" (1/1) ... [2020-12-22 03:41:16,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:41:16,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:41:16,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:41:16,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:41:16,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:16" (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 03:41:16,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:41:16,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:41:16,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:41:16,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:41:16,984 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:41:16,985 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2020-12-22 03:41:16,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:41:16 BoogieIcfgContainer [2020-12-22 03:41:16,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:41:16,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:41:16,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:41:16,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:41:16,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:41:16" (1/3) ... [2020-12-22 03:41:16,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43af6e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:41:16, skipping insertion in model container [2020-12-22 03:41:16,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:16" (2/3) ... [2020-12-22 03:41:16,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43af6e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:41:16, skipping insertion in model container [2020-12-22 03:41:16,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:41:16" (3/3) ... [2020-12-22 03:41:16,997 INFO L111 eAbstractionObserver]: Analyzing ICFG arctan_Pade.c [2020-12-22 03:41:17,004 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:41:17,010 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:41:17,052 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:41:17,116 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:41:17,116 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:41:17,116 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:41:17,117 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:41:17,117 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:41:17,117 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:41:17,120 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:41:17,120 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:41:17,152 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-12-22 03:41:17,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 03:41:17,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:17,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:17,166 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:17,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:17,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1916877351, now seen corresponding path program 1 times [2020-12-22 03:41:17,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:17,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478432574] [2020-12-22 03:41:17,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:17,378 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 03:41:17,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478432574] [2020-12-22 03:41:17,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:41:17,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:41:17,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456371541] [2020-12-22 03:41:17,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 03:41:17,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:17,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 03:41:17,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:41:17,413 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-12-22 03:41:17,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:17,437 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2020-12-22 03:41:17,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 03:41:17,438 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-22 03:41:17,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:17,461 INFO L225 Difference]: With dead ends: 47 [2020-12-22 03:41:17,462 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 03:41:17,472 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 03:41:17,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 03:41:17,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-22 03:41:17,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 03:41:17,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-22 03:41:17,517 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2020-12-22 03:41:17,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:17,517 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-22 03:41:17,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 03:41:17,517 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-22 03:41:17,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 03:41:17,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:17,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:17,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:41:17,520 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:17,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:17,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1523850341, now seen corresponding path program 1 times [2020-12-22 03:41:17,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:17,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66271120] [2020-12-22 03:41:17,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:41:17,603 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:41:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:41:17,646 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:41:17,690 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:41:17,690 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:41:17,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:41:17,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:41:17 BoogieIcfgContainer [2020-12-22 03:41:17,749 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:41:17,750 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:41:17,750 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:41:17,750 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:41:17,751 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:41:16" (3/4) ... [2020-12-22 03:41:17,755 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 03:41:17,755 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:41:17,761 INFO L168 Benchmark]: Toolchain (without parser) took 1554.30 ms. Allocated memory is still 173.0 MB. Free memory was 153.0 MB in the beginning and 119.0 MB in the end (delta: 33.9 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:17,762 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 173.0 MB. Free memory is still 144.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:41:17,764 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.67 ms. Allocated memory is still 173.0 MB. Free memory was 152.7 MB in the beginning and 142.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:17,765 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.62 ms. Allocated memory is still 173.0 MB. Free memory was 142.7 MB in the beginning and 140.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:17,767 INFO L168 Benchmark]: Boogie Preprocessor took 25.35 ms. Allocated memory is still 173.0 MB. Free memory was 140.9 MB in the beginning and 139.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:17,768 INFO L168 Benchmark]: RCFGBuilder took 466.17 ms. Allocated memory is still 173.0 MB. Free memory was 139.6 MB in the beginning and 142.0 MB in the end (delta: -2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:17,769 INFO L168 Benchmark]: TraceAbstraction took 760.02 ms. Allocated memory is still 173.0 MB. Free memory was 141.7 MB in the beginning and 119.7 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:17,772 INFO L168 Benchmark]: Witness Printer took 5.20 ms. Allocated memory is still 173.0 MB. Free memory was 119.7 MB in the beginning and 119.4 MB in the end (delta: 309.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:41:17,788 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 173.0 MB. Free memory is still 144.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 243.67 ms. Allocated memory is still 173.0 MB. Free memory was 152.7 MB in the beginning and 142.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 45.62 ms. Allocated memory is still 173.0 MB. Free memory was 142.7 MB in the beginning and 140.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.35 ms. Allocated memory is still 173.0 MB. Free memory was 140.9 MB in the beginning and 139.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 466.17 ms. Allocated memory is still 173.0 MB. Free memory was 139.6 MB in the beginning and 142.0 MB in the end (delta: -2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 760.02 ms. Allocated memory is still 173.0 MB. Free memory was 141.7 MB in the beginning and 119.7 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Witness Printer took 5.20 ms. Allocated memory is still 173.0 MB. Free memory was 119.7 MB in the beginning and 119.4 MB in the end (delta: 309.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: 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 54, overapproximation of someUnaryDOUBLEoperation at line 41, overapproximation of someBinaryArithmeticDOUBLEoperation at line 30. Possible FailurePath: [L20] const double Pi=3.141592653589793238; VAL [Pi=1570796326794896619/500000000000000000] [L47] double a, r; [L49] a = __VERIFIER_nondet_double() [L15] COND FALSE !(!cond) VAL [Pi=1570796326794896619/500000000000000000] [L41] COND TRUE x < 0 [L35] COND FALSE !(x > 1.) [L24] double x_2 = x*x; [L25] return 1. - x_2 / (3. + 9./5.*x_2); VAL [Pi=1570796326794896619/500000000000000000] [L30] return x*PADE_2_2(x); [L36] return ARCTAN_0_1(x); [L41] return -ARCTAN_POS(-x); [L52] r = ARCTAN(a) [L17] COND TRUE !(cond) VAL [Pi=1570796326794896619/500000000000000000] [L17] reach_error() VAL [Pi=1570796326794896619/500000000000000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 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: 27 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=25occurred 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...