/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-dcfa08f [2020-12-23 06:12:48,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:12:48,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:12:48,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:12:48,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:12:48,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:12:48,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:12:48,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:12:48,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:12:48,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:12:48,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:12:48,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:12:48,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:12:48,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:12:48,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:12:48,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:12:48,608 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:12:48,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:12:48,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:12:48,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:12:48,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:12:48,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:12:48,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:12:48,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:12:48,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:12:48,668 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:12:48,669 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:12:48,671 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:12:48,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:12:48,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:12:48,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:12:48,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:12:48,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:12:48,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:12:48,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:12:48,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:12:48,688 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:12:48,731 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:12:48,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:12:48,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:12:48,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:12:48,737 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:12:48,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:12:48,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:12:48,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:12:48,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:12:48,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:12:48,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:12:48,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:12:48,740 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:12:48,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:12:48,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:12:48,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:12:48,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:12:48,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:12:48,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:12:48,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:12:48,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:12:48,741 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:12:48,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:12:48,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:12:48,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:12:48,742 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:12:49,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:12:49,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:12:49,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:12:49,228 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:12:49,229 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:12:49,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2020-12-23 06:12:49,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7c21e6d7e/b4b03460eb2e4694ac970fad2578dc41/FLAGd915cb0e3 [2020-12-23 06:12:49,957 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:12:49,959 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2020-12-23 06:12:49,970 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7c21e6d7e/b4b03460eb2e4694ac970fad2578dc41/FLAGd915cb0e3 [2020-12-23 06:12:50,297 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7c21e6d7e/b4b03460eb2e4694ac970fad2578dc41 [2020-12-23 06:12:50,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:12:50,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:12:50,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:12:50,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:12:50,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:12:50,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:12:50" (1/1) ... [2020-12-23 06:12:50,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@634f836b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:50, skipping insertion in model container [2020-12-23 06:12:50,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:12:50" (1/1) ... [2020-12-23 06:12:50,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:12:50,351 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,] [2020-12-23 06:12:50,603 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] [2020-12-23 06:12:50,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:12:50,624 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,] [2020-12-23 06:12:50,674 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] [2020-12-23 06:12:50,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:12:50,692 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:12:50,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:50 WrapperNode [2020-12-23 06:12:50,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:12:50,694 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:12:50,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:12:50,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:12:50,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:50" (1/1) ... [2020-12-23 06:12:50,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:50" (1/1) ... [2020-12-23 06:12:50,739 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:12:50,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:12:50,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:12:50,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:12:50,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:50" (1/1) ... [2020-12-23 06:12:50,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:50" (1/1) ... [2020-12-23 06:12:50,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:50" (1/1) ... [2020-12-23 06:12:50,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:50" (1/1) ... [2020-12-23 06:12:50,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:50" (1/1) ... [2020-12-23 06:12:50,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:50" (1/1) ... [2020-12-23 06:12:50,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:50" (1/1) ... [2020-12-23 06:12:50,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:12:50,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:12:50,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:12:50,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:12:50,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:50" (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 [2020-12-23 06:12:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:12:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:12:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-23 06:12:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:12:50,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:12:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 06:12:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 06:12:51,308 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:12:51,309 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-23 06:12:51,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:12:51 BoogieIcfgContainer [2020-12-23 06:12:51,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:12:51,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:12:51,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:12:51,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:12:51,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:12:50" (1/3) ... [2020-12-23 06:12:51,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a9c34e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:12:51, skipping insertion in model container [2020-12-23 06:12:51,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:50" (2/3) ... [2020-12-23 06:12:51,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a9c34e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:12:51, skipping insertion in model container [2020-12-23 06:12:51,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:12:51" (3/3) ... [2020-12-23 06:12:51,335 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2020-12-23 06:12:51,352 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:12:51,365 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:12:51,410 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:12:51,440 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:12:51,440 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:12:51,441 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:12:51,441 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:12:51,441 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:12:51,441 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:12:51,441 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:12:51,442 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:12:51,460 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-23 06:12:51,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:12:51,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:12:51,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:12:51,468 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:12:51,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:12:51,475 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-12-23 06:12:51,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:12:51,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760003970] [2020-12-23 06:12:51,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:12:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:12:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:12:51,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760003970] [2020-12-23 06:12:51,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:12:51,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:12:51,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178593205] [2020-12-23 06:12:51,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:12:51,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:12:51,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:12:51,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:12:51,754 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-12-23 06:12:51,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:12:51,784 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2020-12-23 06:12:51,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:12:51,786 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-23 06:12:51,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:12:51,798 INFO L225 Difference]: With dead ends: 62 [2020-12-23 06:12:51,798 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 06:12:51,803 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 [2020-12-23 06:12:51,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 06:12:51,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-23 06:12:51,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 06:12:51,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-12-23 06:12:51,853 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-12-23 06:12:51,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:12:51,853 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-12-23 06:12:51,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:12:51,854 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-12-23 06:12:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:12:51,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:12:51,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:12:51,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:12:51,857 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:12:51,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:12:51,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-12-23 06:12:51,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:12:51,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458248947] [2020-12-23 06:12:51,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:12:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:12:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:12:52,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458248947] [2020-12-23 06:12:52,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:12:52,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:12:52,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128124599] [2020-12-23 06:12:52,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:12:52,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:12:52,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:12:52,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:12:52,020 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-12-23 06:12:52,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:12:52,110 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-12-23 06:12:52,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:12:52,111 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-23 06:12:52,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:12:52,113 INFO L225 Difference]: With dead ends: 53 [2020-12-23 06:12:52,113 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 06:12:52,114 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 [2020-12-23 06:12:52,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 06:12:52,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-12-23 06:12:52,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:12:52,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-23 06:12:52,121 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-12-23 06:12:52,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:12:52,121 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-23 06:12:52,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:12:52,122 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-23 06:12:52,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:12:52,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:12:52,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:12:52,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:12:52,123 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:12:52,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:12:52,124 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-12-23 06:12:52,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:12:52,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522821767] [2020-12-23 06:12:52,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:12:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:12:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:12:52,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522821767] [2020-12-23 06:12:52,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:12:52,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:12:52,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755327907] [2020-12-23 06:12:52,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:12:52,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:12:52,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:12:52,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:12:52,213 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-12-23 06:12:52,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:12:52,305 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-12-23 06:12:52,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:12:52,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-23 06:12:52,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:12:52,310 INFO L225 Difference]: With dead ends: 55 [2020-12-23 06:12:52,311 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:12:52,314 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 [2020-12-23 06:12:52,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:12:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-12-23 06:12:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:12:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-23 06:12:52,332 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2020-12-23 06:12:52,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:12:52,333 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-23 06:12:52,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:12:52,333 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-23 06:12:52,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 06:12:52,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:12:52,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:12:52,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 06:12:52,336 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:12:52,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:12:52,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2020-12-23 06:12:52,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:12:52,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693022605] [2020-12-23 06:12:52,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:12:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:12:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:12:52,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693022605] [2020-12-23 06:12:52,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:12:52,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:12:52,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683617244] [2020-12-23 06:12:52,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:12:52,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:12:52,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:12:52,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:12:52,410 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-12-23 06:12:52,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:12:52,460 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-12-23 06:12:52,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:12:52,461 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-23 06:12:52,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:12:52,462 INFO L225 Difference]: With dead ends: 57 [2020-12-23 06:12:52,462 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 06:12:52,463 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 [2020-12-23 06:12:52,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 06:12:52,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-12-23 06:12:52,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:12:52,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-23 06:12:52,469 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2020-12-23 06:12:52,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:12:52,470 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-23 06:12:52,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:12:52,470 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-23 06:12:52,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:12:52,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:12:52,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:12:52,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 06:12:52,471 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:12:52,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:12:52,472 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2020-12-23 06:12:52,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:12:52,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121022671] [2020-12-23 06:12:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:12:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:12:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:12:52,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121022671] [2020-12-23 06:12:52,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:12:52,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:12:52,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74411497] [2020-12-23 06:12:52,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:12:52,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:12:52,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:12:52,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:12:52,551 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-12-23 06:12:52,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:12:52,598 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-12-23 06:12:52,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:12:52,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-23 06:12:52,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:12:52,600 INFO L225 Difference]: With dead ends: 55 [2020-12-23 06:12:52,600 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:12:52,601 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 [2020-12-23 06:12:52,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:12:52,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-12-23 06:12:52,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:12:52,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-23 06:12:52,607 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2020-12-23 06:12:52,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:12:52,607 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-23 06:12:52,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:12:52,607 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-23 06:12:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:12:52,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:12:52,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:12:52,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 06:12:52,612 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:12:52,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:12:52,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-12-23 06:12:52,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:12:52,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595349738] [2020-12-23 06:12:52,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:12:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:12:52,663 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:12:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:12:52,705 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:12:52,738 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 06:12:52,739 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 06:12:52,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 06:12:52,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:12:52 BoogieIcfgContainer [2020-12-23 06:12:52,776 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:12:52,776 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:12:52,777 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:12:52,777 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:12:52,777 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:12:51" (3/4) ... [2020-12-23 06:12:52,781 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 06:12:52,781 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:12:52,784 INFO L168 Benchmark]: Toolchain (without parser) took 2480.29 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 63.6 MB in the end (delta: 62.7 MB). Peak memory consumption was 62.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:12:52,784 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 123.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:12:52,785 INFO L168 Benchmark]: CACSL2BoogieTranslator took 386.88 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 115.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:12:52,786 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.24 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:12:52,787 INFO L168 Benchmark]: Boogie Preprocessor took 32.11 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 112.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:12:52,788 INFO L168 Benchmark]: RCFGBuilder took 537.75 ms. Allocated memory is still 151.0 MB. Free memory was 112.3 MB in the beginning and 129.1 MB in the end (delta: -16.8 MB). Peak memory consumption was 18.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:12:52,788 INFO L168 Benchmark]: TraceAbstraction took 1460.21 ms. Allocated memory is still 151.0 MB. Free memory was 128.6 MB in the beginning and 64.1 MB in the end (delta: 64.5 MB). Peak memory consumption was 65.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:12:52,789 INFO L168 Benchmark]: Witness Printer took 4.82 ms. Allocated memory is still 151.0 MB. Free memory was 64.1 MB in the beginning and 63.6 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:12:52,793 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 123.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 386.88 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 115.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 45.24 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.11 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 112.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 537.75 ms. Allocated memory is still 151.0 MB. Free memory was 112.3 MB in the beginning and 129.1 MB in the end (delta: -16.8 MB). Peak memory consumption was 18.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1460.21 ms. Allocated memory is still 151.0 MB. Free memory was 128.6 MB in the beginning and 64.1 MB in the end (delta: 64.5 MB). Peak memory consumption was 65.0 MB. Max. memory is 8.0 GB. * Witness Printer took 4.82 ms. Allocated memory is still 151.0 MB. Free memory was 64.1 MB in the beginning and 63.6 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: 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: 1.3s, 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, 0.1s 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...