/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:14:10,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:14:10,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:14:10,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:14:10,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:14:10,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:14:10,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:14:10,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:14:10,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:14:10,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:14:10,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:14:10,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:14:10,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:14:10,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:14:10,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:14:10,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:14:10,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:14:10,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:14:10,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:14:10,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:14:10,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:14:10,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:14:10,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:14:10,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:14:10,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 16:14:10,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:14:10,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:14:10,171 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:14:10,172 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 16:14:10,218 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:14:10,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:14:10,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:14:10,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:14:10,223 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:14:10,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:14:10,224 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:14:10,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:14:10,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:14:10,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:14:10,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:14:10,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:14:10,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:14:10,225 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:14:10,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:14:10,225 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:14:10,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:14:10,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:14:10,229 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:14:10,229 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:14:10,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:14:10,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:14:10,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:14:10,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:14:10,230 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:14:10,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:14:10,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:14:10,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:14:10,232 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:14:10,233 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 16:14:10,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:14:10,585 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:14:10,590 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:14:10,591 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:14:10,591 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:14:10,592 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c [2020-08-18 16:14:10,655 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e8be4882/09f8a6c929fe469ca4a4a37ee5c97171/FLAGbf8e69ac0 [2020-08-18 16:14:11,136 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:14:11,137 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c [2020-08-18 16:14:11,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e8be4882/09f8a6c929fe469ca4a4a37ee5c97171/FLAGbf8e69ac0 [2020-08-18 16:14:11,484 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e8be4882/09f8a6c929fe469ca4a4a37ee5c97171 [2020-08-18 16:14:11,495 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:14:11,497 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:14:11,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:14:11,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:14:11,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:14:11,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:14:11" (1/1) ... [2020-08-18 16:14:11,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ec993ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:11, skipping insertion in model container [2020-08-18 16:14:11,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:14:11" (1/1) ... [2020-08-18 16:14:11,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:14:11,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:14:11,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:14:11,741 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:14:11,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:14:11,875 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:14:11,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:11 WrapperNode [2020-08-18 16:14:11,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:14:11,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:14:11,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:14:11,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:14:11,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:11" (1/1) ... [2020-08-18 16:14:11,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:11" (1/1) ... [2020-08-18 16:14:11,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:11" (1/1) ... [2020-08-18 16:14:11,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:11" (1/1) ... [2020-08-18 16:14:11,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:11" (1/1) ... [2020-08-18 16:14:11,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:11" (1/1) ... [2020-08-18 16:14:11,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:11" (1/1) ... [2020-08-18 16:14:11,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:14:11,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:14:11,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:14:11,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:14:11,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 16:14:11,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:14:11,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:14:11,983 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2020-08-18 16:14:11,983 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2020-08-18 16:14:11,983 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-18 16:14:11,983 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:14:11,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:14:11,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-18 16:14:11,984 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2020-08-18 16:14:11,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 16:14:11,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 16:14:11,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 16:14:11,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:14:11,985 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2020-08-18 16:14:11,985 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-18 16:14:11,985 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:14:11,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:14:11,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:14:11,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 16:14:11,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 16:14:12,308 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:14:12,309 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 16:14:12,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:14:12 BoogieIcfgContainer [2020-08-18 16:14:12,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:14:12,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:14:12,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:14:12,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:14:12,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:14:11" (1/3) ... [2020-08-18 16:14:12,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76478afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:14:12, skipping insertion in model container [2020-08-18 16:14:12,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:11" (2/3) ... [2020-08-18 16:14:12,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76478afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:14:12, skipping insertion in model container [2020-08-18 16:14:12,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:14:12" (3/3) ... [2020-08-18 16:14:12,324 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2020-08-18 16:14:12,337 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:14:12,345 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:14:12,362 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:14:12,388 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:14:12,388 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:14:12,388 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:14:12,389 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:14:12,389 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:14:12,389 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:14:12,390 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:14:12,390 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:14:12,411 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-18 16:14:12,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 16:14:12,418 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:14:12,419 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] [2020-08-18 16:14:12,420 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:14:12,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:14:12,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1078913502, now seen corresponding path program 1 times [2020-08-18 16:14:12,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:14:12,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835647665] [2020-08-18 16:14:12,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:14:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:12,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:14:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:12,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:14:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:12,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 16:14:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:14:12,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835647665] [2020-08-18 16:14:12,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:14:12,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 16:14:12,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855486739] [2020-08-18 16:14:12,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 16:14:12,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:14:12,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 16:14:12,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:14:12,748 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-08-18 16:14:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:14:13,062 INFO L93 Difference]: Finished difference Result 79 states and 107 transitions. [2020-08-18 16:14:13,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 16:14:13,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-08-18 16:14:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:14:13,076 INFO L225 Difference]: With dead ends: 79 [2020-08-18 16:14:13,076 INFO L226 Difference]: Without dead ends: 40 [2020-08-18 16:14:13,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:14:13,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-18 16:14:13,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-08-18 16:14:13,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-18 16:14:13,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-08-18 16:14:13,129 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 22 [2020-08-18 16:14:13,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:14:13,129 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-08-18 16:14:13,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 16:14:13,130 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-08-18 16:14:13,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 16:14:13,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:14:13,132 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, 1] [2020-08-18 16:14:13,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:14:13,133 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:14:13,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:14:13,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1357269066, now seen corresponding path program 1 times [2020-08-18 16:14:13,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:14:13,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206435133] [2020-08-18 16:14:13,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:14:13,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:13,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:14:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:13,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:14:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:13,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 16:14:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:14:13,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206435133] [2020-08-18 16:14:13,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:14:13,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 16:14:13,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653359733] [2020-08-18 16:14:13,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 16:14:13,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:14:13,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 16:14:13,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:14:13,352 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 6 states. [2020-08-18 16:14:13,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:14:13,627 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-08-18 16:14:13,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 16:14:13,628 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-08-18 16:14:13,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:14:13,631 INFO L225 Difference]: With dead ends: 59 [2020-08-18 16:14:13,632 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 16:14:13,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-18 16:14:13,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 16:14:13,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-08-18 16:14:13,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-18 16:14:13,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-08-18 16:14:13,646 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 23 [2020-08-18 16:14:13,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:14:13,646 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-08-18 16:14:13,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 16:14:13,646 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-08-18 16:14:13,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 16:14:13,650 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:14:13,651 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, 1, 1, 1, 1] [2020-08-18 16:14:13,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:14:13,651 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:14:13,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:14:13,652 INFO L82 PathProgramCache]: Analyzing trace with hash 888409989, now seen corresponding path program 1 times [2020-08-18 16:14:13,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:14:13,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001835519] [2020-08-18 16:14:13,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:14:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:13,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:14:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:13,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:14:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:13,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 16:14:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:14:13,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001835519] [2020-08-18 16:14:13,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:14:13,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 16:14:13,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557390798] [2020-08-18 16:14:13,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 16:14:13,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:14:13,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 16:14:13,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:14:13,808 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2020-08-18 16:14:14,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:14:14,034 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-08-18 16:14:14,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 16:14:14,035 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-08-18 16:14:14,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:14:14,037 INFO L225 Difference]: With dead ends: 63 [2020-08-18 16:14:14,037 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 16:14:14,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-18 16:14:14,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 16:14:14,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-08-18 16:14:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-18 16:14:14,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-08-18 16:14:14,048 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 26 [2020-08-18 16:14:14,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:14:14,049 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-08-18 16:14:14,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 16:14:14,049 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-08-18 16:14:14,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 16:14:14,050 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:14:14,050 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, 1, 1, 1, 1] [2020-08-18 16:14:14,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:14:14,051 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:14:14,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:14:14,051 INFO L82 PathProgramCache]: Analyzing trace with hash -908541370, now seen corresponding path program 1 times [2020-08-18 16:14:14,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:14:14,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132615343] [2020-08-18 16:14:14,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:14:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:14:14,072 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:14:14,072 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:14:14,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:14:14,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:14:14 BoogieIcfgContainer [2020-08-18 16:14:14,101 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:14:14,105 INFO L168 Benchmark]: Toolchain (without parser) took 2606.01 ms. Allocated memory was 140.0 MB in the beginning and 235.9 MB in the end (delta: 95.9 MB). Free memory was 103.0 MB in the beginning and 143.1 MB in the end (delta: -40.1 MB). Peak memory consumption was 55.8 MB. Max. memory is 7.1 GB. [2020-08-18 16:14:14,107 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-08-18 16:14:14,108 INFO L168 Benchmark]: CACSL2BoogieTranslator took 377.24 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 103.0 MB in the beginning and 180.9 MB in the end (delta: -77.9 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:14:14,110 INFO L168 Benchmark]: Boogie Preprocessor took 44.73 ms. Allocated memory is still 202.4 MB. Free memory was 180.9 MB in the beginning and 178.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-18 16:14:14,112 INFO L168 Benchmark]: RCFGBuilder took 393.65 ms. Allocated memory is still 202.4 MB. Free memory was 178.3 MB in the beginning and 158.8 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2020-08-18 16:14:14,119 INFO L168 Benchmark]: TraceAbstraction took 1784.15 ms. Allocated memory was 202.4 MB in the beginning and 235.9 MB in the end (delta: 33.6 MB). Free memory was 158.8 MB in the beginning and 143.1 MB in the end (delta: 15.6 MB). Peak memory consumption was 49.2 MB. Max. memory is 7.1 GB. [2020-08-18 16:14:14,129 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 377.24 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 103.0 MB in the beginning and 180.9 MB in the end (delta: -77.9 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.73 ms. Allocated memory is still 202.4 MB. Free memory was 180.9 MB in the beginning and 178.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 393.65 ms. Allocated memory is still 202.4 MB. Free memory was 178.3 MB in the beginning and 158.8 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1784.15 ms. Allocated memory was 202.4 MB in the beginning and 235.9 MB in the end (delta: 33.6 MB). Free memory was 158.8 MB in the beginning and 143.1 MB in the end (delta: 15.6 MB). Peak memory consumption was 49.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 79]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 78, overapproximation of someUnaryFLOAToperation at line 74. Possible FailurePath: [L73] float x = 0.0f; [L74] float y = -0.0f; [L75] CALL, EXPR fmax_float(x, y) [L44] CALL, EXPR __fpclassify_float(x) [L21] __uint32_t w; [L24] ieee_float_shape_type gf_u; [L25] gf_u.value = (x) [L26] EXPR gf_u.word [L26] (w) = gf_u.word [L29] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L31-L32] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L34-L35] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L37] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L40] return 0; [L44] RET, EXPR __fpclassify_float(x) [L44] COND TRUE __fpclassify_float(x) == 0 [L45] return y; [L75] RET, EXPR fmax_float(x, y) [L75] float res = fmax_float(x, y); [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L78] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L79] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 123 SDtfs, 117 SDslu, 43 SDs, 0 SdLazy, 296 SolverSat, 56 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred 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, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 97 NumberOfCodeBlocks, 97 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 4170 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...