/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-newlib/float_req_bl_1252b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:07:07,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:07:07,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:07:07,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:07:07,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:07:07,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:07:07,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:07:07,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:07:07,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:07:07,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:07:07,265 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:07:07,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:07:07,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:07:07,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:07:07,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:07:07,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:07:07,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:07:07,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:07:07,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:07:07,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:07:07,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:07:07,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:07:07,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:07:07,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:07:07,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:07:07,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:07:07,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:07:07,339 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:07:07,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:07:07,341 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:07:07,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:07:07,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:07:07,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:07:07,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:07:07,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:07:07,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:07:07,350 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 16:07:07,378 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:07:07,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:07:07,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:07:07,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:07:07,381 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:07:07,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:07:07,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:07:07,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:07:07,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:07:07,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:07:07,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:07:07,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:07:07,382 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:07:07,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:07:07,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:07:07,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:07:07,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:07:07,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:07:07,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:07:07,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:07:07,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:07:07,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:07:07,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:07:07,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:07:07,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:07:07,385 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:07:07,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:07:07,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:07:07,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:07:07,777 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:07:07,777 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:07:07,778 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-01-06 16:07:07,864 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e0dc92d95/82e7c6edf0c6466da718418cf25a2233/FLAG6b567cf77 [2021-01-06 16:07:08,491 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:07:08,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-01-06 16:07:08,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e0dc92d95/82e7c6edf0c6466da718418cf25a2233/FLAG6b567cf77 [2021-01-06 16:07:08,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e0dc92d95/82e7c6edf0c6466da718418cf25a2233 [2021-01-06 16:07:08,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:07:08,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:07:08,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:07:08,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:07:08,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:07:08,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:07:08" (1/1) ... [2021-01-06 16:07:08,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60fa2be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:08, skipping insertion in model container [2021-01-06 16:07:08,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:07:08" (1/1) ... [2021-01-06 16:07:08,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:07:08,915 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: StructLHS[VariableLHS[~gf_u~0,],value] left hand side expression in assignment: lhs: VariableLHS[~w~0,] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~gf_u~1,],value] left hand side expression in assignment: lhs: VariableLHS[~w~1,] [2021-01-06 16:07:09,090 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/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-01-06 16:07:09,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:07:09,107 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#gf_u~0,],base],StructAccessExpression[IdentifierExpression[~#gf_u~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~w~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#gf_u~1,],base],StructAccessExpression[IdentifierExpression[~#gf_u~1,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~w~1,] [2021-01-06 16:07:09,157 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/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-01-06 16:07:09,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:07:09,181 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:07:09,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:09 WrapperNode [2021-01-06 16:07:09,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:07:09,183 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:07:09,183 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:07:09,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:07:09,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:09" (1/1) ... [2021-01-06 16:07:09,218 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:09" (1/1) ... [2021-01-06 16:07:09,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:07:09,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:07:09,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:07:09,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:07:09,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:09" (1/1) ... [2021-01-06 16:07:09,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:09" (1/1) ... [2021-01-06 16:07:09,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:09" (1/1) ... [2021-01-06 16:07:09,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:09" (1/1) ... [2021-01-06 16:07:09,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:09" (1/1) ... [2021-01-06 16:07:09,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:09" (1/1) ... [2021-01-06 16:07:09,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:09" (1/1) ... [2021-01-06 16:07:09,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:07:09,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:07:09,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:07:09,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:07:09,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:09" (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 16:07:09,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:07:09,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:07:09,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-01-06 16:07:09,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:07:09,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:07:09,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:07:09,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:07:10,043 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:07:10,043 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-01-06 16:07:10,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:07:10 BoogieIcfgContainer [2021-01-06 16:07:10,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:07:10,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:07:10,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:07:10,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:07:10,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:07:08" (1/3) ... [2021-01-06 16:07:10,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1214f0bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:07:10, skipping insertion in model container [2021-01-06 16:07:10,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:09" (2/3) ... [2021-01-06 16:07:10,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1214f0bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:07:10, skipping insertion in model container [2021-01-06 16:07:10,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:07:10" (3/3) ... [2021-01-06 16:07:10,056 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2021-01-06 16:07:10,063 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:07:10,068 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:07:10,089 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:07:10,118 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:07:10,118 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:07:10,118 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:07:10,119 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:07:10,119 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:07:10,119 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:07:10,119 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:07:10,119 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:07:10,135 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2021-01-06 16:07:10,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:07:10,141 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:07:10,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:07:10,142 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:07:10,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:07:10,149 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-01-06 16:07:10,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:07:10,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925455797] [2021-01-06 16:07:10,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:07:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:07:10,316 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 16:07:10,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925455797] [2021-01-06 16:07:10,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:07:10,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:07:10,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585434009] [2021-01-06 16:07:10,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:07:10,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:07:10,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:07:10,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:07:10,344 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2021-01-06 16:07:10,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:07:10,363 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-01-06 16:07:10,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:07:10,365 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-01-06 16:07:10,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:07:10,375 INFO L225 Difference]: With dead ends: 62 [2021-01-06 16:07:10,376 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 16:07:10,379 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 16:07:10,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 16:07:10,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-01-06 16:07:10,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 16:07:10,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 16:07:10,417 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-01-06 16:07:10,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:07:10,417 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 16:07:10,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:07:10,417 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 16:07:10,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:07:10,418 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:07:10,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:07:10,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:07:10,419 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:07:10,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:07:10,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-01-06 16:07:10,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:07:10,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431899029] [2021-01-06 16:07:10,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:07:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:07:10,532 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 16:07:10,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431899029] [2021-01-06 16:07:10,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:07:10,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:07:10,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606659008] [2021-01-06 16:07:10,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:07:10,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:07:10,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:07:10,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:07:10,536 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2021-01-06 16:07:10,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:07:10,607 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-01-06 16:07:10,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:07:10,608 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-01-06 16:07:10,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:07:10,609 INFO L225 Difference]: With dead ends: 53 [2021-01-06 16:07:10,609 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 16:07:10,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:07:10,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 16:07:10,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-01-06 16:07:10,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:07:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-01-06 16:07:10,617 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-01-06 16:07:10,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:07:10,618 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-01-06 16:07:10,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:07:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-01-06 16:07:10,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:07:10,619 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:07:10,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:07:10,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:07:10,620 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:07:10,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:07:10,620 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2021-01-06 16:07:10,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:07:10,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351503831] [2021-01-06 16:07:10,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:07:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:07:10,675 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 16:07:10,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351503831] [2021-01-06 16:07:10,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:07:10,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:07:10,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157490905] [2021-01-06 16:07:10,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:07:10,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:07:10,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:07:10,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:07:10,679 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2021-01-06 16:07:10,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:07:10,811 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2021-01-06 16:07:10,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:07:10,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-01-06 16:07:10,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:07:10,813 INFO L225 Difference]: With dead ends: 55 [2021-01-06 16:07:10,813 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 16:07:10,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:07:10,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 16:07:10,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-01-06 16:07:10,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:07:10,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-01-06 16:07:10,820 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2021-01-06 16:07:10,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:07:10,821 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-01-06 16:07:10,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:07:10,821 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-01-06 16:07:10,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:07:10,822 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:07:10,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:07:10,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:07:10,823 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:07:10,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:07:10,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2021-01-06 16:07:10,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:07:10,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675530104] [2021-01-06 16:07:10,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:07:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:07:10,890 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 16:07:10,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675530104] [2021-01-06 16:07:10,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:07:10,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:07:10,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459656533] [2021-01-06 16:07:10,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:07:10,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:07:10,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:07:10,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:07:10,893 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2021-01-06 16:07:10,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:07:10,949 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2021-01-06 16:07:10,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:07:10,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-01-06 16:07:10,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:07:10,954 INFO L225 Difference]: With dead ends: 57 [2021-01-06 16:07:10,954 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 16:07:10,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:07:10,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 16:07:10,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2021-01-06 16:07:10,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:07:10,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-01-06 16:07:10,966 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2021-01-06 16:07:10,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:07:10,966 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-01-06 16:07:10,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:07:10,966 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-01-06 16:07:10,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 16:07:10,969 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:07:10,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:07:10,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 16:07:10,970 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:07:10,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:07:10,973 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2021-01-06 16:07:10,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:07:10,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498409244] [2021-01-06 16:07:10,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:07:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:07:11,070 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 16:07:11,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498409244] [2021-01-06 16:07:11,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:07:11,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:07:11,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855314863] [2021-01-06 16:07:11,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:07:11,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:07:11,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:07:11,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:07:11,074 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2021-01-06 16:07:11,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:07:11,121 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2021-01-06 16:07:11,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:07:11,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2021-01-06 16:07:11,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:07:11,123 INFO L225 Difference]: With dead ends: 55 [2021-01-06 16:07:11,123 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 16:07:11,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:07:11,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 16:07:11,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-01-06 16:07:11,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:07:11,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-01-06 16:07:11,130 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2021-01-06 16:07:11,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:07:11,130 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-01-06 16:07:11,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:07:11,130 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-01-06 16:07:11,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 16:07:11,131 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:07:11,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:07:11,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 16:07:11,132 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:07:11,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:07:11,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-01-06 16:07:11,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:07:11,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630892092] [2021-01-06 16:07:11,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:07:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:07:11,184 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:07:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:07:11,224 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:07:11,278 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:07:11,279 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:07:11,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 16:07:11,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:07:11 BoogieIcfgContainer [2021-01-06 16:07:11,338 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:07:11,339 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:07:11,340 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:07:11,340 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:07:11,340 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:07:10" (3/4) ... [2021-01-06 16:07:11,348 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 16:07:11,349 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:07:11,354 INFO L168 Benchmark]: Toolchain (without parser) took 2478.59 ms. Allocated memory was 151.0 MB in the beginning and 187.7 MB in the end (delta: 36.7 MB). Free memory was 108.3 MB in the beginning and 135.9 MB in the end (delta: -27.7 MB). Peak memory consumption was 8.7 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:11,355 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:07:11,356 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.99 ms. Allocated memory is still 151.0 MB. Free memory was 108.1 MB in the beginning and 97.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:11,357 INFO L168 Benchmark]: Boogie Procedure Inliner took 99.05 ms. Allocated memory is still 151.0 MB. Free memory was 97.5 MB in the beginning and 133.4 MB in the end (delta: -35.9 MB). Peak memory consumption was 5.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:11,358 INFO L168 Benchmark]: Boogie Preprocessor took 78.69 ms. Allocated memory is still 151.0 MB. Free memory was 133.4 MB in the beginning and 131.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:11,359 INFO L168 Benchmark]: RCFGBuilder took 682.22 ms. Allocated memory is still 151.0 MB. Free memory was 131.9 MB in the beginning and 115.9 MB in the end (delta: 16.0 MB). Peak memory consumption was 17.6 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:11,360 INFO L168 Benchmark]: TraceAbstraction took 1290.40 ms. Allocated memory was 151.0 MB in the beginning and 187.7 MB in the end (delta: 36.7 MB). Free memory was 115.4 MB in the beginning and 136.5 MB in the end (delta: -21.0 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:11,361 INFO L168 Benchmark]: Witness Printer took 9.30 ms. Allocated memory is still 187.7 MB. Free memory was 136.5 MB in the beginning and 135.9 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:11,366 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 305.99 ms. Allocated memory is still 151.0 MB. Free memory was 108.1 MB in the beginning and 97.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 99.05 ms. Allocated memory is still 151.0 MB. Free memory was 97.5 MB in the beginning and 133.4 MB in the end (delta: -35.9 MB). Peak memory consumption was 5.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 78.69 ms. Allocated memory is still 151.0 MB. Free memory was 133.4 MB in the beginning and 131.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 682.22 ms. Allocated memory is still 151.0 MB. Free memory was 131.9 MB in the beginning and 115.9 MB in the end (delta: 16.0 MB). Peak memory consumption was 17.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1290.40 ms. Allocated memory was 151.0 MB in the beginning and 187.7 MB in the end (delta: 36.7 MB). Free memory was 115.4 MB in the beginning and 136.5 MB in the end (delta: -21.0 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. * Witness Printer took 9.30 ms. Allocated memory is still 187.7 MB. Free memory was 136.5 MB in the beginning and 135.9 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 81]: 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 80, overapproximation of someUnaryFLOAToperation at line 76. Possible FailurePath: [L75] float x = 0.0f; [L76] float y = -0.0f; [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L33-L34] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L36-L37] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L39] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L42] return 0; [L46] COND TRUE __fpclassify_float(x) == 0 [L47] return y; [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 64 SDslu, 298 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 5 MinimizatonAttempts, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 799 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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...