/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/floats-cbmc-regression/float20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:00:30,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:00:30,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:00:30,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:00:30,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:00:31,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:00:31,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:00:31,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:00:31,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:00:31,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:00:31,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:00:31,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:00:31,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:00:31,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:00:31,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:00:31,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:00:31,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:00:31,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:00:31,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:00:31,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:00:31,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:00:31,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:00:31,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:00:31,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:00:31,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:00:31,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:00:31,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:00:31,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:00:31,098 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:00:31,099 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:00:31,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:00:31,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:00:31,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:00:31,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:00:31,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:00:31,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:00:31,110 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:00:31,163 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:00:31,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:00:31,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:00:31,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:00:31,169 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:00:31,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:00:31,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:00:31,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:00:31,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:00:31,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:00:31,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:00:31,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:00:31,173 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:00:31,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:00:31,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:00:31,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:00:31,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:00:31,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:00:31,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:00:31,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:00:31,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:00:31,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:00:31,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:00:31,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:00:31,176 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:00:31,177 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:00:31,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:00:31,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:00:31,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:00:31,686 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:00:31,687 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:00:31,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cbmc-regression/float20.i [2021-01-06 16:00:31,781 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c98dd2e05/25ab9b3ba9af47b4bb4cf22eec2f217d/FLAG0d84ed2a6 [2021-01-06 16:00:32,369 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:00:32,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/floats-cbmc-regression/float20.i [2021-01-06 16:00:32,380 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c98dd2e05/25ab9b3ba9af47b4bb4cf22eec2f217d/FLAG0d84ed2a6 [2021-01-06 16:00:32,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c98dd2e05/25ab9b3ba9af47b4bb4cf22eec2f217d [2021-01-06 16:00:32,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:00:32,753 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:00:32,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:00:32,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:00:32,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:00:32,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:00:32" (1/1) ... [2021-01-06 16:00:32,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f7452e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:32, skipping insertion in model container [2021-01-06 16:00:32,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:00:32" (1/1) ... [2021-01-06 16:00:32,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:00:32,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:00:32,954 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/floats-cbmc-regression/float20.i[1032,1045] [2021-01-06 16:00:32,966 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/floats-cbmc-regression/float20.i[1306,1319] [2021-01-06 16:00:32,972 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/floats-cbmc-regression/float20.i[1464,1477] [2021-01-06 16:00:32,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:00:32,988 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:00:33,007 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/floats-cbmc-regression/float20.i[1032,1045] [2021-01-06 16:00:33,013 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/floats-cbmc-regression/float20.i[1306,1319] [2021-01-06 16:00:33,017 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/floats-cbmc-regression/float20.i[1464,1477] [2021-01-06 16:00:33,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:00:33,037 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:00:33,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:33 WrapperNode [2021-01-06 16:00:33,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:00:33,039 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:00:33,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:00:33,039 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:00:33,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:33" (1/1) ... [2021-01-06 16:00:33,057 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:33" (1/1) ... [2021-01-06 16:00:33,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:00:33,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:00:33,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:00:33,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:00:33,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:33" (1/1) ... [2021-01-06 16:00:33,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:33" (1/1) ... [2021-01-06 16:00:33,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:33" (1/1) ... [2021-01-06 16:00:33,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:33" (1/1) ... [2021-01-06 16:00:33,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:33" (1/1) ... [2021-01-06 16:00:33,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:33" (1/1) ... [2021-01-06 16:00:33,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:33" (1/1) ... [2021-01-06 16:00:33,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:00:33,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:00:33,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:00:33,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:00:33,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:00:33,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:00:33,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:00:33,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:00:33,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:00:33,490 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:00:33,490 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 16:00:33,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:00:33 BoogieIcfgContainer [2021-01-06 16:00:33,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:00:33,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:00:33,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:00:33,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:00:33,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:00:32" (1/3) ... [2021-01-06 16:00:33,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa1e98e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:00:33, skipping insertion in model container [2021-01-06 16:00:33,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:33" (2/3) ... [2021-01-06 16:00:33,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa1e98e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:00:33, skipping insertion in model container [2021-01-06 16:00:33,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:00:33" (3/3) ... [2021-01-06 16:00:33,502 INFO L111 eAbstractionObserver]: Analyzing ICFG float20.i [2021-01-06 16:00:33,527 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:00:33,531 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-01-06 16:00:33,552 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-06 16:00:33,582 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:00:33,582 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:00:33,582 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:00:33,582 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:00:33,583 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:00:33,583 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:00:33,583 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:00:33,583 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:00:33,600 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-01-06 16:00:33,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:00:33,606 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:33,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:00:33,607 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:33,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:33,614 INFO L82 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2021-01-06 16:00:33,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:33,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302984637] [2021-01-06 16:00:33,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:33,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302984637] [2021-01-06 16:00:33,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:00:33,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:00:33,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397132037] [2021-01-06 16:00:33,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:00:33,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:33,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:00:33,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:00:33,806 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2021-01-06 16:00:33,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:33,826 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2021-01-06 16:00:33,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:00:33,827 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 16:00:33,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:33,837 INFO L225 Difference]: With dead ends: 43 [2021-01-06 16:00:33,837 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 16:00:33,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:00:33,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 16:00:33,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 16:00:33,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 16:00:33,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2021-01-06 16:00:33,880 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 6 [2021-01-06 16:00:33,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:33,880 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2021-01-06 16:00:33,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:00:33,881 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2021-01-06 16:00:33,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:00:33,881 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:33,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:00:33,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:00:33,882 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:33,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:33,883 INFO L82 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2021-01-06 16:00:33,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:33,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675884140] [2021-01-06 16:00:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:00:33,903 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:00:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:00:33,917 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:00:33,937 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:00:33,938 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:00:33,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:00:33,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:00:33 BoogieIcfgContainer [2021-01-06 16:00:33,961 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:00:33,962 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:00:33,962 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:00:33,963 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:00:33,963 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:00:33" (3/4) ... [2021-01-06 16:00:33,967 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 16:00:33,967 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:00:33,969 INFO L168 Benchmark]: Toolchain (without parser) took 1216.11 ms. Allocated memory is still 174.1 MB. Free memory was 148.5 MB in the beginning and 136.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-01-06 16:00:33,970 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 174.1 MB. Free memory is still 146.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:00:33,971 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.12 ms. Allocated memory is still 174.1 MB. Free memory was 148.3 MB in the beginning and 136.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:00:33,972 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.36 ms. Allocated memory is still 174.1 MB. Free memory was 136.4 MB in the beginning and 134.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:00:33,973 INFO L168 Benchmark]: Boogie Preprocessor took 23.97 ms. Allocated memory is still 174.1 MB. Free memory was 134.9 MB in the beginning and 133.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:00:33,974 INFO L168 Benchmark]: RCFGBuilder took 389.16 ms. Allocated memory is still 174.1 MB. Free memory was 133.9 MB in the beginning and 121.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-01-06 16:00:33,975 INFO L168 Benchmark]: TraceAbstraction took 467.27 ms. Allocated memory is still 174.1 MB. Free memory was 120.9 MB in the beginning and 137.4 MB in the end (delta: -16.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:00:33,975 INFO L168 Benchmark]: Witness Printer took 4.78 ms. Allocated memory is still 174.1 MB. Free memory was 137.4 MB in the beginning and 136.9 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:00:33,980 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 174.1 MB. Free memory is still 146.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 281.12 ms. Allocated memory is still 174.1 MB. Free memory was 148.3 MB in the beginning and 136.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 39.36 ms. Allocated memory is still 174.1 MB. Free memory was 136.4 MB in the beginning and 134.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.97 ms. Allocated memory is still 174.1 MB. Free memory was 134.9 MB in the beginning and 133.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 389.16 ms. Allocated memory is still 174.1 MB. Free memory was 133.9 MB in the beginning and 121.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 467.27 ms. Allocated memory is still 174.1 MB. Free memory was 120.9 MB in the beginning and 137.4 MB in the end (delta: -16.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 4.78 ms. Allocated memory is still 174.1 MB. Free memory was 137.4 MB in the beginning and 136.9 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: 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 21, overapproximation of someBinaryArithmeticFLOAToperation at line 19, overapproximation of someBinaryArithmeticDOUBLEoperation at line 18. Possible FailurePath: [L48] float f=__VERIFIER_nondet_float(); [L17] COND FALSE !(!(min == 0x1.fffffep-105f)) [L18] float modifier = (0x1.0p-23 * (1<<1)); [L19] float ulpdiff = min * modifier; [L21] COND TRUE !(ulpdiff == 0x1p-126f) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 22 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=23occurred 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, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 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...