/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 --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1091.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 01:06:13,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 01:06:13,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 01:06:13,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 01:06:13,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 01:06:13,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 01:06:13,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 01:06:13,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 01:06:13,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 01:06:13,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 01:06:13,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 01:06:13,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 01:06:13,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:06:13,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:06:13,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:06:13,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:06:13,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:06:13,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:06:13,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:06:13,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:06:13,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:06:13,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:06:13,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:06:13,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:06:13,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 01:06:13,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 01:06:13,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 01:06:13,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 01:06:13,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 01:06:13,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-19 01:06:13,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:06:13,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:06:13,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:06:13,923 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 [2020-08-19 01:06:13,970 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:06:13,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:06:13,972 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:06:13,972 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:06:13,975 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:06:13,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:06:13,975 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:06:13,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:06:13,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:06:13,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:06:13,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:06:13,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:06:13,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:06:13,976 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:06:13,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:06:13,977 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:06:13,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:06:13,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:06:13,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:06:13,977 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:06:13,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:06:13,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:06:13,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:06:13,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:06:13,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:06:13,979 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:06:13,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:06:13,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:06:13,979 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:06:13,979 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; [2020-08-19 01:06:14,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:06:14,334 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:06:14,337 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:06:14,338 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:06:14,339 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:06:14,339 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1091.c [2020-08-19 01:06:14,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ac84d89c/1eba9433c5e0423d96de5a0e0e5a5ee1/FLAG420ed6322 [2020-08-19 01:06:14,894 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:06:14,895 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1091.c [2020-08-19 01:06:14,908 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ac84d89c/1eba9433c5e0423d96de5a0e0e5a5ee1/FLAG420ed6322 [2020-08-19 01:06:15,239 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ac84d89c/1eba9433c5e0423d96de5a0e0e5a5ee1 [2020-08-19 01:06:15,248 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:06:15,250 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:06:15,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:06:15,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:06:15,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:06:15,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:06:15" (1/1) ... [2020-08-19 01:06:15,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bd7e874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:15, skipping insertion in model container [2020-08-19 01:06:15,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:06:15" (1/1) ... [2020-08-19 01:06:15,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:06:15,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:06:15,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:06:15,573 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:06:15,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:06:15,704 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:06:15,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:15 WrapperNode [2020-08-19 01:06:15,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:06:15,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:06:15,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:06:15,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:06:15,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:15" (1/1) ... [2020-08-19 01:06:15,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:15" (1/1) ... [2020-08-19 01:06:15,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:15" (1/1) ... [2020-08-19 01:06:15,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:15" (1/1) ... [2020-08-19 01:06:15,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:15" (1/1) ... [2020-08-19 01:06:15,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:15" (1/1) ... [2020-08-19 01:06:15,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:15" (1/1) ... [2020-08-19 01:06:15,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:06:15,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:06:15,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:06:15,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:06:15,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:15" (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 [2020-08-19 01:06:15,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:06:15,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:06:15,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ceil_float [2020-08-19 01:06:15,815 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-08-19 01:06:15,815 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:06:15,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:06:15,815 INFO L130 BoogieDeclarations]: Found specification of procedure ceil_float [2020-08-19 01:06:15,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 01:06:15,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-19 01:06:15,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 01:06:15,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 01:06:15,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 01:06:15,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-19 01:06:15,816 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-08-19 01:06:15,816 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:06:15,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:06:15,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:06:16,112 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:06:16,113 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-19 01:06:16,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:06:16 BoogieIcfgContainer [2020-08-19 01:06:16,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:06:16,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:06:16,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:06:16,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:06:16,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:06:15" (1/3) ... [2020-08-19 01:06:16,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446a182b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:06:16, skipping insertion in model container [2020-08-19 01:06:16,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:15" (2/3) ... [2020-08-19 01:06:16,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446a182b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:06:16, skipping insertion in model container [2020-08-19 01:06:16,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:06:16" (3/3) ... [2020-08-19 01:06:16,137 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1091.c [2020-08-19 01:06:16,156 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:06:16,163 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 01:06:16,180 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 01:06:16,206 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:06:16,207 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:06:16,207 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:06:16,207 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:06:16,207 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:06:16,208 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:06:16,208 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:06:16,208 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:06:16,227 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-08-19 01:06:16,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 01:06:16,233 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:06:16,234 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] [2020-08-19 01:06:16,235 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:06:16,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:06:16,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1088803944, now seen corresponding path program 1 times [2020-08-19 01:06:16,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:06:16,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615397188] [2020-08-19 01:06:16,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:06:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:16,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:06:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:16,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 01:06:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:16,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-19 01:06:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:06:16,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615397188] [2020-08-19 01:06:16,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:06:16,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 01:06:16,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82543852] [2020-08-19 01:06:16,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 01:06:16,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:06:16,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 01:06:16,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 01:06:16,523 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 4 states. [2020-08-19 01:06:16,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:06:16,734 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2020-08-19 01:06:16,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 01:06:16,736 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-08-19 01:06:16,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:06:16,748 INFO L225 Difference]: With dead ends: 70 [2020-08-19 01:06:16,748 INFO L226 Difference]: Without dead ends: 35 [2020-08-19 01:06:16,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:06:16,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-19 01:06:16,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-08-19 01:06:16,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-19 01:06:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2020-08-19 01:06:16,796 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 22 [2020-08-19 01:06:16,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:06:16,797 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2020-08-19 01:06:16,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 01:06:16,797 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2020-08-19 01:06:16,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 01:06:16,798 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:06:16,799 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] [2020-08-19 01:06:16,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:06:16,799 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:06:16,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:06:16,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1824817680, now seen corresponding path program 1 times [2020-08-19 01:06:16,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:06:16,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400446978] [2020-08-19 01:06:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:06:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 01:06:16,881 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 01:06:16,881 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 01:06:16,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:06:16,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 01:06:16 BoogieIcfgContainer [2020-08-19 01:06:16,907 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 01:06:16,909 INFO L168 Benchmark]: Toolchain (without parser) took 1658.59 ms. Allocated memory was 141.0 MB in the beginning and 202.4 MB in the end (delta: 61.3 MB). Free memory was 103.8 MB in the beginning and 112.7 MB in the end (delta: -8.9 MB). Peak memory consumption was 52.5 MB. Max. memory is 7.1 GB. [2020-08-19 01:06:16,910 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 01:06:16,911 INFO L168 Benchmark]: CACSL2BoogieTranslator took 454.27 ms. Allocated memory was 141.0 MB in the beginning and 202.4 MB in the end (delta: 61.3 MB). Free memory was 103.6 MB in the beginning and 180.7 MB in the end (delta: -77.0 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-08-19 01:06:16,912 INFO L168 Benchmark]: Boogie Preprocessor took 40.93 ms. Allocated memory is still 202.4 MB. Free memory was 180.7 MB in the beginning and 178.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-19 01:06:16,913 INFO L168 Benchmark]: RCFGBuilder took 372.29 ms. Allocated memory is still 202.4 MB. Free memory was 178.4 MB in the beginning and 159.1 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. [2020-08-19 01:06:16,914 INFO L168 Benchmark]: TraceAbstraction took 785.47 ms. Allocated memory is still 202.4 MB. Free memory was 159.1 MB in the beginning and 112.7 MB in the end (delta: 46.3 MB). Peak memory consumption was 46.3 MB. Max. memory is 7.1 GB. [2020-08-19 01:06:16,918 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 454.27 ms. Allocated memory was 141.0 MB in the beginning and 202.4 MB in the end (delta: 61.3 MB). Free memory was 103.6 MB in the beginning and 180.7 MB in the end (delta: -77.0 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 40.93 ms. Allocated memory is still 202.4 MB. Free memory was 180.7 MB in the beginning and 178.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 372.29 ms. Allocated memory is still 202.4 MB. Free memory was 178.4 MB in the beginning and 159.1 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 785.47 ms. Allocated memory is still 202.4 MB. Free memory was 159.1 MB in the beginning and 112.7 MB in the end (delta: 46.3 MB). Peak memory consumption was 46.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 72]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 57, overapproximation of someBinaryArithmeticFLOAToperation at line 66, overapproximation of bitwiseAnd at line 21. Possible FailurePath: [L11] static const float huge_ceil = 1.0e30; [L66] float x = 0.0f / 0.0f; [L68] CALL, EXPR ceil_float(x) [L14] __int32_t i0, j0; [L15] __uint32_t i, ix; [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (i0) = gf_u.word [L21] ix = (i0 & 0x7fffffff) [L22] j0 = (ix >> 23) - 0x7f [L23] COND FALSE !(j0 < 23) [L43] COND FALSE !(!((ix) < 0x7f800000L)) [L46] return x; [L68] RET, EXPR ceil_float(x) [L68] float res = ceil_float(x); [L71] CALL, EXPR isnan_float(res) [L57] return x != x; [L71] RET, EXPR isnan_float(res) [L71] COND TRUE !isnan_float(res) [L72] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 38 SDslu, 5 SDs, 0 SdLazy, 44 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 945 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...