/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_1231.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:07:04,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:07:04,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:07:04,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:07:04,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:07:04,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:07:04,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:07:04,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:07:04,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:07:04,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:07:04,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:07:04,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:07:04,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:07:04,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:07:04,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:07:04,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:07:04,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:07:04,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:07:04,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:07:04,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:07:04,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:07:04,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:07:04,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:07:04,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:07:04,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:07:04,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:07:04,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:07:04,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:07:04,323 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 16:07:04,374 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:07:04,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:07:04,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:07:04,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:07:04,379 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:07:04,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:07:04,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:07:04,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:07:04,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:07:04,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:07:04,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:07:04,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:07:04,382 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:07:04,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:07:04,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:07:04,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:07:04,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:07:04,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:07:04,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:07:04,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:07:04,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:07:04,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:07:04,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:07:04,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:07:04,385 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:07:04,385 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:07:04,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:07:04,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:07:04,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:07:04,870 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:07:04,871 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:07:04,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1231.c [2021-01-06 16:07:04,968 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/16dea5b3a/4193d59d3dd745988e3f10cb2ff66cc6/FLAGdbd7c6fba [2021-01-06 16:07:05,700 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:07:05,701 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1231.c [2021-01-06 16:07:05,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/16dea5b3a/4193d59d3dd745988e3f10cb2ff66cc6/FLAGdbd7c6fba [2021-01-06 16:07:06,031 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/16dea5b3a/4193d59d3dd745988e3f10cb2ff66cc6 [2021-01-06 16:07:06,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:07:06,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:07:06,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:07:06,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:07:06,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:07:06,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:07:06" (1/1) ... [2021-01-06 16:07:06,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e44da46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:06, skipping insertion in model container [2021-01-06 16:07:06,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:07:06" (1/1) ... [2021-01-06 16:07:06,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:07:06,081 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 16:07:06,266 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_1231.c[1835,1848] [2021-01-06 16:07:06,271 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_1231.c[1994,2007] [2021-01-06 16:07:06,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:07:06,283 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 16:07:06,314 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_1231.c[1835,1848] [2021-01-06 16:07:06,316 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_1231.c[1994,2007] [2021-01-06 16:07:06,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:07:06,337 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:07:06,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:06 WrapperNode [2021-01-06 16:07:06,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:07:06,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:07:06,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:07:06,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:07:06,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:06" (1/1) ... [2021-01-06 16:07:06,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:06" (1/1) ... [2021-01-06 16:07:06,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:07:06,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:07:06,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:07:06,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:07:06,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:06" (1/1) ... [2021-01-06 16:07:06,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:06" (1/1) ... [2021-01-06 16:07:06,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:06" (1/1) ... [2021-01-06 16:07:06,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:06" (1/1) ... [2021-01-06 16:07:06,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:06" (1/1) ... [2021-01-06 16:07:06,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:06" (1/1) ... [2021-01-06 16:07:06,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:06" (1/1) ... [2021-01-06 16:07:06,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:07:06,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:07:06,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:07:06,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:07:06,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:06" (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 16:07:06,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:07:06,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:07:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-01-06 16:07:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:07:06,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:07:06,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:07:06,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:07:07,214 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:07:07,215 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-01-06 16:07:07,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:07:07 BoogieIcfgContainer [2021-01-06 16:07:07,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:07:07,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:07:07,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:07:07,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:07:07,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:07:06" (1/3) ... [2021-01-06 16:07:07,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3b4b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:07:07, skipping insertion in model container [2021-01-06 16:07:07,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:06" (2/3) ... [2021-01-06 16:07:07,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3b4b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:07:07, skipping insertion in model container [2021-01-06 16:07:07,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:07:07" (3/3) ... [2021-01-06 16:07:07,233 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1231.c [2021-01-06 16:07:07,241 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:07:07,247 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 16:07:07,270 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 16:07:07,318 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:07:07,318 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:07:07,319 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:07:07,319 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:07:07,319 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:07:07,319 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:07:07,320 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:07:07,320 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:07:07,342 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2021-01-06 16:07:07,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:07:07,351 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:07:07,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:07:07,352 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:07:07,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:07:07,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1204154757, now seen corresponding path program 1 times [2021-01-06 16:07:07,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:07:07,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221310909] [2021-01-06 16:07:07,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:07:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:07:07,613 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 16:07:07,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221310909] [2021-01-06 16:07:07,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:07:07,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:07:07,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95766639] [2021-01-06 16:07:07,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:07:07,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:07:07,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:07:07,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:07:07,639 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 4 states. [2021-01-06 16:07:07,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:07:07,725 INFO L93 Difference]: Finished difference Result 90 states and 134 transitions. [2021-01-06 16:07:07,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:07:07,727 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2021-01-06 16:07:07,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:07:07,739 INFO L225 Difference]: With dead ends: 90 [2021-01-06 16:07:07,739 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 16:07:07,742 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 16:07:07,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 16:07:07,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-01-06 16:07:07,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 16:07:07,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2021-01-06 16:07:07,789 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 16 [2021-01-06 16:07:07,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:07:07,789 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2021-01-06 16:07:07,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:07:07,790 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2021-01-06 16:07:07,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:07:07,791 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:07:07,791 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:07:07,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:07:07,792 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:07:07,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:07:07,793 INFO L82 PathProgramCache]: Analyzing trace with hash 44236684, now seen corresponding path program 1 times [2021-01-06 16:07:07,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:07:07,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775684412] [2021-01-06 16:07:07,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:07:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:07:07,965 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 16:07:07,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775684412] [2021-01-06 16:07:07,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:07:07,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:07:07,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263982278] [2021-01-06 16:07:07,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:07:07,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:07:07,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:07:07,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:07:07,972 INFO L87 Difference]: Start difference. First operand 45 states and 60 transitions. Second operand 4 states. [2021-01-06 16:07:08,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:07:08,074 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2021-01-06 16:07:08,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:07:08,075 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-01-06 16:07:08,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:07:08,077 INFO L225 Difference]: With dead ends: 77 [2021-01-06 16:07:08,077 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 16:07:08,078 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 16:07:08,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 16:07:08,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2021-01-06 16:07:08,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 16:07:08,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2021-01-06 16:07:08,089 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 18 [2021-01-06 16:07:08,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:07:08,090 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2021-01-06 16:07:08,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:07:08,090 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2021-01-06 16:07:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 16:07:08,091 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:07:08,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:07:08,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:07:08,092 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:07:08,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:07:08,093 INFO L82 PathProgramCache]: Analyzing trace with hash -674173253, now seen corresponding path program 1 times [2021-01-06 16:07:08,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:07:08,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070685890] [2021-01-06 16:07:08,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:07:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:07:08,202 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 16:07:08,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070685890] [2021-01-06 16:07:08,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:07:08,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:07:08,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589433548] [2021-01-06 16:07:08,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:07:08,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:07:08,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:07:08,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:07:08,206 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand 4 states. [2021-01-06 16:07:08,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:07:08,295 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2021-01-06 16:07:08,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:07:08,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-01-06 16:07:08,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:07:08,297 INFO L225 Difference]: With dead ends: 79 [2021-01-06 16:07:08,298 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 16:07:08,298 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 16:07:08,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 16:07:08,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 47. [2021-01-06 16:07:08,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 16:07:08,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2021-01-06 16:07:08,307 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 19 [2021-01-06 16:07:08,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:07:08,307 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2021-01-06 16:07:08,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:07:08,308 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2021-01-06 16:07:08,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 16:07:08,309 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:07:08,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:07:08,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:07:08,310 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:07:08,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:07:08,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1345927737, now seen corresponding path program 1 times [2021-01-06 16:07:08,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:07:08,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590087030] [2021-01-06 16:07:08,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:07:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:07:08,368 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 16:07:08,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590087030] [2021-01-06 16:07:08,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:07:08,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:07:08,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128632836] [2021-01-06 16:07:08,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:07:08,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:07:08,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:07:08,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:07:08,371 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand 4 states. [2021-01-06 16:07:08,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:07:08,424 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2021-01-06 16:07:08,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:07:08,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-01-06 16:07:08,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:07:08,428 INFO L225 Difference]: With dead ends: 81 [2021-01-06 16:07:08,428 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 16:07:08,429 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 16:07:08,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 16:07:08,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 47. [2021-01-06 16:07:08,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 16:07:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2021-01-06 16:07:08,437 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 20 [2021-01-06 16:07:08,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:07:08,437 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2021-01-06 16:07:08,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:07:08,437 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2021-01-06 16:07:08,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:07:08,439 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:07:08,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:07:08,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 16:07:08,439 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:07:08,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:07:08,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1380709804, now seen corresponding path program 1 times [2021-01-06 16:07:08,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:07:08,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046194035] [2021-01-06 16:07:08,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:07:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:07:08,488 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 16:07:08,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046194035] [2021-01-06 16:07:08,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:07:08,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:07:08,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758357778] [2021-01-06 16:07:08,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:07:08,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:07:08,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:07:08,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:07:08,494 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand 3 states. [2021-01-06 16:07:08,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:07:08,513 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2021-01-06 16:07:08,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:07:08,514 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2021-01-06 16:07:08,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:07:08,515 INFO L225 Difference]: With dead ends: 50 [2021-01-06 16:07:08,515 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 16:07:08,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:07:08,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 16:07:08,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 16:07:08,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 16:07:08,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2021-01-06 16:07:08,523 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 21 [2021-01-06 16:07:08,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:07:08,523 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2021-01-06 16:07:08,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:07:08,524 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2021-01-06 16:07:08,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:07:08,525 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:07:08,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:07:08,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 16:07:08,525 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:07:08,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:07:08,526 INFO L82 PathProgramCache]: Analyzing trace with hash 147544209, now seen corresponding path program 1 times [2021-01-06 16:07:08,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:07:08,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364111698] [2021-01-06 16:07:08,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:07:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:07:08,566 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:07:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:07:08,598 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:07:08,637 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:07:08,638 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:07:08,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 16:07:08,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:07:08 BoogieIcfgContainer [2021-01-06 16:07:08,679 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:07:08,680 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:07:08,680 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:07:08,680 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:07:08,681 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:07:07" (3/4) ... [2021-01-06 16:07:08,685 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 16:07:08,685 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:07:08,687 INFO L168 Benchmark]: Toolchain (without parser) took 2649.63 ms. Allocated memory is still 167.8 MB. Free memory was 142.8 MB in the beginning and 111.8 MB in the end (delta: 31.0 MB). Peak memory consumption was 31.2 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:08,688 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 167.8 MB. Free memory is still 141.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:07:08,689 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.15 ms. Allocated memory is still 167.8 MB. Free memory was 142.8 MB in the beginning and 131.7 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:08,690 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.49 ms. Allocated memory is still 167.8 MB. Free memory was 131.7 MB in the beginning and 129.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:08,691 INFO L168 Benchmark]: Boogie Preprocessor took 37.11 ms. Allocated memory is still 167.8 MB. Free memory was 129.6 MB in the beginning and 128.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:08,692 INFO L168 Benchmark]: RCFGBuilder took 786.88 ms. Allocated memory is still 167.8 MB. Free memory was 128.1 MB in the beginning and 103.8 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:08,692 INFO L168 Benchmark]: TraceAbstraction took 1458.29 ms. Allocated memory is still 167.8 MB. Free memory was 103.2 MB in the beginning and 112.3 MB in the end (delta: -9.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:07:08,693 INFO L168 Benchmark]: Witness Printer took 5.26 ms. Allocated memory is still 167.8 MB. Free memory was 112.3 MB in the beginning and 111.8 MB in the end (delta: 553.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:08,697 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 167.8 MB. Free memory is still 141.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 295.15 ms. Allocated memory is still 167.8 MB. Free memory was 142.8 MB in the beginning and 131.7 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 54.49 ms. Allocated memory is still 167.8 MB. Free memory was 131.7 MB in the beginning and 129.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.11 ms. Allocated memory is still 167.8 MB. Free memory was 129.6 MB in the beginning and 128.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 786.88 ms. Allocated memory is still 167.8 MB. Free memory was 128.1 MB in the beginning and 103.8 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1458.29 ms. Allocated memory is still 167.8 MB. Free memory was 103.2 MB in the beginning and 112.3 MB in the end (delta: -9.1 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 5.26 ms. Allocated memory is still 167.8 MB. Free memory was 112.3 MB in the beginning and 111.8 MB in the end (delta: 553.7 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: 77]: 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 76. Possible FailurePath: [L68] float x = __VERIFIER_nondet_float(); [L69] float y = __VERIFIER_nondet_float(); [L59] return x != x; [L70] EXPR isnan_float(x) && !isnan_float(y) [L59] return x != x; [L70] EXPR isnan_float(x) && !isnan_float(y) [L70-L71] (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L70-L71] COND TRUE (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L25-L26] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L28-L29] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L31] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L34] return 0; [L38] COND TRUE __fpclassify_float(x) == 0 [L39] return y; [L73] float res = fmin_float(x, y); [L59] return x != x; [L76] EXPR isnan_float(x) && !isnan_float(y) [L59] return x != x; [L76] EXPR isnan_float(x) && !isnan_float(y) [L76] COND TRUE isnan_float(x) && !isnan_float(y) && res != y [L77] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 47 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 343 SDtfs, 79 SDslu, 503 SDs, 0 SdLazy, 88 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=5, 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, 62 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 116 NumberOfCodeBlocks, 116 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 89 ConstructedInterpolants, 0 QuantifiedInterpolants, 1865 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...