/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/interpolation.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:41:43,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:41:43,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:41:43,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 03:41:43,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:41:43,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:41:43,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:41:43,856 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:41:43,895 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:41:43,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:41:43,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:41:43,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:41:43,898 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:41:43,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:41:43,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:41:43,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:41:43,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:41:43,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:41:43,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:41:43,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:41:43,900 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:41:43,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:41:43,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:41:43,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:41:43,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:41:43,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:41:43,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:41:43,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:41:43,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:41:43,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:41:43,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:41:43,904 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:41:43,904 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:41:43,904 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:41:44,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:41:44,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:41:44,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:41:44,417 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:41:44,417 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:41:44,418 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/interpolation.c [2020-12-22 03:41:44,508 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f46b18286/74f8ffc86f97459f9f90cac6f7a2ca9d/FLAG6b607a4e3 [2020-12-22 03:41:45,100 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:41:45,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/interpolation.c [2020-12-22 03:41:45,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f46b18286/74f8ffc86f97459f9f90cac6f7a2ca9d/FLAG6b607a4e3 [2020-12-22 03:41:45,501 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f46b18286/74f8ffc86f97459f9f90cac6f7a2ca9d [2020-12-22 03:41:45,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:41:45,509 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:41:45,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:41:45,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:41:45,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:41:45,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:41:45" (1/1) ... [2020-12-22 03:41:45,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c24d60f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:45, skipping insertion in model container [2020-12-22 03:41:45,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:41:45" (1/1) ... [2020-12-22 03:41:45,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:41:45,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:41:45,699 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/interpolation.c[449,462] [2020-12-22 03:41:45,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:41:45,735 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:41:45,748 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/interpolation.c[449,462] [2020-12-22 03:41:45,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:41:45,777 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:41:45,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:45 WrapperNode [2020-12-22 03:41:45,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:41:45,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:41:45,780 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:41:45,780 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:41:45,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:45" (1/1) ... [2020-12-22 03:41:45,799 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:45" (1/1) ... [2020-12-22 03:41:45,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:41:45,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:41:45,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:41:45,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:41:45,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:45" (1/1) ... [2020-12-22 03:41:45,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:45" (1/1) ... [2020-12-22 03:41:45,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:45" (1/1) ... [2020-12-22 03:41:45,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:45" (1/1) ... [2020-12-22 03:41:45,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:45" (1/1) ... [2020-12-22 03:41:45,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:45" (1/1) ... [2020-12-22 03:41:45,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:45" (1/1) ... [2020-12-22 03:41:45,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:41:45,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:41:45,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:41:45,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:41:45,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:45" (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 03:41:45,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:41:45,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:41:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-12-22 03:41:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:41:45,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:41:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-12-22 03:41:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 03:41:46,236 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:41:46,237 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 03:41:46,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:41:46 BoogieIcfgContainer [2020-12-22 03:41:46,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:41:46,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:41:46,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:41:46,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:41:46,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:41:45" (1/3) ... [2020-12-22 03:41:46,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@683ab9e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:41:46, skipping insertion in model container [2020-12-22 03:41:46,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:45" (2/3) ... [2020-12-22 03:41:46,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@683ab9e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:41:46, skipping insertion in model container [2020-12-22 03:41:46,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:41:46" (3/3) ... [2020-12-22 03:41:46,248 INFO L111 eAbstractionObserver]: Analyzing ICFG interpolation.c [2020-12-22 03:41:46,255 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:41:46,260 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:41:46,306 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:41:46,358 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:41:46,358 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:41:46,358 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:41:46,359 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:41:46,359 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:41:46,359 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:41:46,359 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:41:46,360 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:41:46,378 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-22 03:41:46,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 03:41:46,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:46,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:46,385 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:46,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:46,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1235833265, now seen corresponding path program 1 times [2020-12-22 03:41:46,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:46,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383770496] [2020-12-22 03:41:46,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:46,742 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 03:41:46,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383770496] [2020-12-22 03:41:46,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:41:46,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:41:46,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899153540] [2020-12-22 03:41:46,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 03:41:46,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:46,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 03:41:46,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:41:46,770 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-22 03:41:46,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:46,788 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2020-12-22 03:41:46,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 03:41:46,789 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-22 03:41:46,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:46,799 INFO L225 Difference]: With dead ends: 29 [2020-12-22 03:41:46,799 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 03:41:46,802 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 03:41:46,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 03:41:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 03:41:46,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 03:41:46,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-22 03:41:46,842 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2020-12-22 03:41:46,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:46,843 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-22 03:41:46,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 03:41:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-22 03:41:46,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 03:41:46,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:46,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:46,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:41:46,845 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:46,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:46,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1178902664, now seen corresponding path program 1 times [2020-12-22 03:41:46,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:46,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714932607] [2020-12-22 03:41:46,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:46,905 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 03:41:46,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714932607] [2020-12-22 03:41:46,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:41:46,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:41:46,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959953299] [2020-12-22 03:41:46,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:41:46,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:46,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:41:46,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:41:46,911 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2020-12-22 03:41:46,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:46,933 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-22 03:41:46,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:41:46,933 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-22 03:41:46,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:46,937 INFO L225 Difference]: With dead ends: 24 [2020-12-22 03:41:46,938 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 03:41:46,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:41:46,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 03:41:46,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2020-12-22 03:41:46,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 03:41:46,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-22 03:41:46,948 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-12-22 03:41:46,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:46,948 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-22 03:41:46,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:41:46,949 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-22 03:41:46,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 03:41:46,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:46,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:46,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:41:46,953 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:46,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:46,955 INFO L82 PathProgramCache]: Analyzing trace with hash 2110328889, now seen corresponding path program 1 times [2020-12-22 03:41:46,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:46,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464634531] [2020-12-22 03:41:46,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:41:47,008 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:41:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:41:47,034 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:41:47,060 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:41:47,060 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:41:47,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 03:41:47,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:41:47 BoogieIcfgContainer [2020-12-22 03:41:47,097 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:41:47,097 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:41:47,098 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:41:47,098 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:41:47,099 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:41:46" (3/4) ... [2020-12-22 03:41:47,104 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 03:41:47,105 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:41:47,107 INFO L168 Benchmark]: Toolchain (without parser) took 1597.56 ms. Allocated memory is still 153.1 MB. Free memory was 128.3 MB in the beginning and 73.0 MB in the end (delta: 55.3 MB). Peak memory consumption was 55.6 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:47,108 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 153.1 MB. Free memory is still 130.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:41:47,110 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.43 ms. Allocated memory is still 153.1 MB. Free memory was 128.3 MB in the beginning and 118.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:47,111 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.81 ms. Allocated memory is still 153.1 MB. Free memory was 118.1 MB in the beginning and 116.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:47,112 INFO L168 Benchmark]: Boogie Preprocessor took 28.38 ms. Allocated memory is still 153.1 MB. Free memory was 116.6 MB in the beginning and 115.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:47,113 INFO L168 Benchmark]: RCFGBuilder took 386.60 ms. Allocated memory is still 153.1 MB. Free memory was 115.3 MB in the beginning and 101.3 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:47,114 INFO L168 Benchmark]: TraceAbstraction took 856.48 ms. Allocated memory is still 153.1 MB. Free memory was 100.8 MB in the beginning and 73.4 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:47,115 INFO L168 Benchmark]: Witness Printer took 7.31 ms. Allocated memory is still 153.1 MB. Free memory is still 73.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:41:47,120 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 153.1 MB. Free memory is still 130.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 264.43 ms. Allocated memory is still 153.1 MB. Free memory was 128.3 MB in the beginning and 118.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 42.81 ms. Allocated memory is still 153.1 MB. Free memory was 118.1 MB in the beginning and 116.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.38 ms. Allocated memory is still 153.1 MB. Free memory was 116.6 MB in the beginning and 115.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 386.60 ms. Allocated memory is still 153.1 MB. Free memory was 115.3 MB in the beginning and 101.3 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 856.48 ms. Allocated memory is still 153.1 MB. Free memory was 100.8 MB in the beginning and 73.4 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB. * Witness Printer took 7.31 ms. Allocated memory is still 153.1 MB. Free memory is still 73.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 9]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 26, overapproximation of to_real at line 15, overapproximation of someBinaryArithmeticFLOAToperation at line 24. Possible FailurePath: [L13] int i; [L14] float z, t; [L15] float min[] = { 5, 10, 12, 30, 150 }; [L16] float max[] = { 10, 12, 30, 150, 300 }; [L18] t = __VERIFIER_nondet_float() [L19] EXPR min[0] [L19] t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1] [L19] EXPR max[sizeof(max) / sizeof(max[0]) - 1] [L19] t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1] [L7] COND FALSE !(!cond) [L21] i = 0 [L21] COND TRUE i < sizeof(min) / sizeof(min[0]) [L22] EXPR max[i] [L22] COND TRUE t <= max[i] [L24] EXPR min[i] [L24] EXPR max[i] [L24] EXPR min[i] [L24] z = (t - min[i]) / (max[i] - min[i]) [L9] COND TRUE !(cond) [L9] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 32 SDtfs, 6 SDslu, 10 SDs, 0 SdLazy, 6 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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, 2 MinimizatonAttempts, 6 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 180 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...