/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1210.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:22:32,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 01:22:32,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 01:22:32,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 01:22:32,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:22:32,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:22:32,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:22:32,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:22:32,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:22:32,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:22:32,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:22:32,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:22:32,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:22:32,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:22:32,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:22:32,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:22:32,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:22:32,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:22:32,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:22:32,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:22:32,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:22:32,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:22:32,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:22:32,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:22:32,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 01:22:32,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:22:32,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:22:32,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:22:32,288 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 [2020-08-22 01:22:32,326 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:22:32,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:22:32,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:22:32,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:22:32,329 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:22:32,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:22:32,329 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:22:32,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:22:32,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:22:32,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:22:32,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:22:32,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:22:32,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:22:32,332 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:22:32,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:22:32,332 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:22:32,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:22:32,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:22:32,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:22:32,333 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:22:32,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:22:32,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:22:32,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:22:32,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:22:32,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:22:32,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:22:32,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:22:32,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:22:32,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:22:32,335 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=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-08-22 01:22:32,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:22:32,676 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:22:32,679 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:22:32,683 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:22:32,684 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:22:32,684 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1210.c [2020-08-22 01:22:32,766 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d3934c69/ac25c0a0422846b58621446665cd2c80/FLAGde1532073 [2020-08-22 01:22:33,294 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:22:33,294 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1210.c [2020-08-22 01:22:33,304 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d3934c69/ac25c0a0422846b58621446665cd2c80/FLAGde1532073 [2020-08-22 01:22:33,673 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d3934c69/ac25c0a0422846b58621446665cd2c80 [2020-08-22 01:22:33,681 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:22:33,683 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:22:33,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:22:33,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:22:33,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:22:33,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:22:33" (1/1) ... [2020-08-22 01:22:33,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1987833a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:33, skipping insertion in model container [2020-08-22 01:22:33,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:22:33" (1/1) ... [2020-08-22 01:22:33,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:22:33,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:22:33,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:22:33,945 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:22:33,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:22:34,099 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:22:34,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:34 WrapperNode [2020-08-22 01:22:34,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:22:34,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:22:34,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:22:34,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:22:34,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:34" (1/1) ... [2020-08-22 01:22:34,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:34" (1/1) ... [2020-08-22 01:22:34,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:34" (1/1) ... [2020-08-22 01:22:34,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:34" (1/1) ... [2020-08-22 01:22:34,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:34" (1/1) ... [2020-08-22 01:22:34,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:34" (1/1) ... [2020-08-22 01:22:34,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:34" (1/1) ... [2020-08-22 01:22:34,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:22:34,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:22:34,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:22:34,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:22:34,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:34" (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 [2020-08-22 01:22:34,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:22:34,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:22:34,231 INFO L138 BoogieDeclarations]: Found implementation of procedure modf_float [2020-08-22 01:22:34,231 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-08-22 01:22:34,231 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:22:34,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:22:34,231 INFO L130 BoogieDeclarations]: Found specification of procedure modf_float [2020-08-22 01:22:34,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 01:22:34,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-22 01:22:34,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 01:22:34,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 01:22:34,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 01:22:34,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-22 01:22:34,232 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-08-22 01:22:34,232 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:22:34,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:22:34,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:22:34,637 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:22:34,637 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-08-22 01:22:34,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:22:34 BoogieIcfgContainer [2020-08-22 01:22:34,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:22:34,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:22:34,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:22:34,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:22:34,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:22:33" (1/3) ... [2020-08-22 01:22:34,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9172ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:22:34, skipping insertion in model container [2020-08-22 01:22:34,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:34" (2/3) ... [2020-08-22 01:22:34,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9172ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:22:34, skipping insertion in model container [2020-08-22 01:22:34,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:22:34" (3/3) ... [2020-08-22 01:22:34,650 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1210.c [2020-08-22 01:22:34,660 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:22:34,668 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:22:34,686 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:22:34,714 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:22:34,715 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:22:34,715 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:22:34,715 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:22:34,715 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:22:34,716 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:22:34,716 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:22:34,716 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:22:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-08-22 01:22:34,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 01:22:34,741 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:34,742 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] [2020-08-22 01:22:34,742 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:34,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:34,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1399428577, now seen corresponding path program 1 times [2020-08-22 01:22:34,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:34,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002922636] [2020-08-22 01:22:34,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:34,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:34,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:22:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:35,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 01:22:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:22:35,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002922636] [2020-08-22 01:22:35,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:22:35,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:22:35,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294100013] [2020-08-22 01:22:35,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:22:35,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:35,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:22:35,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:22:35,059 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 4 states. [2020-08-22 01:22:35,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:35,280 INFO L93 Difference]: Finished difference Result 88 states and 126 transitions. [2020-08-22 01:22:35,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 01:22:35,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-22 01:22:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:35,293 INFO L225 Difference]: With dead ends: 88 [2020-08-22 01:22:35,294 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 01:22:35,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:22:35,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 01:22:35,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-08-22 01:22:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-22 01:22:35,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-08-22 01:22:35,349 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 25 [2020-08-22 01:22:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:35,349 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-08-22 01:22:35,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:22:35,350 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-08-22 01:22:35,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 01:22:35,352 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:35,353 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, 1] [2020-08-22 01:22:35,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:22:35,353 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:35,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:35,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1932138526, now seen corresponding path program 1 times [2020-08-22 01:22:35,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:35,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399159827] [2020-08-22 01:22:35,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:35,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:35,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:35,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:22:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:35,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 01:22:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:22:35,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399159827] [2020-08-22 01:22:35,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:22:35,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:22:35,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597027622] [2020-08-22 01:22:35,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:22:35,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:35,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:22:35,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:22:35,527 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 5 states. [2020-08-22 01:22:35,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:35,721 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-08-22 01:22:35,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:22:35,721 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-22 01:22:35,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:35,723 INFO L225 Difference]: With dead ends: 47 [2020-08-22 01:22:35,723 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 01:22:35,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:22:35,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 01:22:35,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-08-22 01:22:35,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-22 01:22:35,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-08-22 01:22:35,734 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 27 [2020-08-22 01:22:35,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:35,737 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-08-22 01:22:35,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:22:35,737 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-08-22 01:22:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 01:22:35,738 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:35,739 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2020-08-22 01:22:35,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:22:35,739 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:35,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:35,740 INFO L82 PathProgramCache]: Analyzing trace with hash -425385736, now seen corresponding path program 1 times [2020-08-22 01:22:35,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:35,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353266106] [2020-08-22 01:22:35,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 01:22:35,789 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 01:22:35,790 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 01:22:35,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:22:35,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 01:22:35 BoogieIcfgContainer [2020-08-22 01:22:35,822 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 01:22:35,826 INFO L168 Benchmark]: Toolchain (without parser) took 2140.74 ms. Allocated memory was 147.8 MB in the beginning and 234.4 MB in the end (delta: 86.5 MB). Free memory was 102.3 MB in the beginning and 184.4 MB in the end (delta: -82.1 MB). Peak memory consumption was 4.4 MB. Max. memory is 7.1 GB. [2020-08-22 01:22:35,828 INFO L168 Benchmark]: CDTParser took 0.84 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 01:22:35,829 INFO L168 Benchmark]: CACSL2BoogieTranslator took 415.99 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 102.1 MB in the beginning and 182.8 MB in the end (delta: -80.7 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-08-22 01:22:35,830 INFO L168 Benchmark]: Boogie Preprocessor took 68.80 ms. Allocated memory is still 205.0 MB. Free memory was 182.8 MB in the beginning and 180.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-08-22 01:22:35,831 INFO L168 Benchmark]: RCFGBuilder took 472.36 ms. Allocated memory is still 205.0 MB. Free memory was 180.9 MB in the beginning and 155.9 MB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-08-22 01:22:35,833 INFO L168 Benchmark]: TraceAbstraction took 1178.76 ms. Allocated memory was 205.0 MB in the beginning and 234.4 MB in the end (delta: 29.4 MB). Free memory was 155.3 MB in the beginning and 184.4 MB in the end (delta: -29.1 MB). Peak memory consumption was 237.9 kB. Max. memory is 7.1 GB. [2020-08-22 01:22:35,842 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.84 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 415.99 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 102.1 MB in the beginning and 182.8 MB in the end (delta: -80.7 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 68.80 ms. Allocated memory is still 205.0 MB. Free memory was 182.8 MB in the beginning and 180.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 472.36 ms. Allocated memory is still 205.0 MB. Free memory was 180.9 MB in the beginning and 155.9 MB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1178.76 ms. Allocated memory was 205.0 MB in the beginning and 234.4 MB in the end (delta: 29.4 MB). Free memory was 155.3 MB in the beginning and 184.4 MB in the end (delta: -29.1 MB). Peak memory consumption was 237.9 kB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 86]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 73, overapproximation of someBinaryArithmeticFLOAToperation at line 80, overapproximation of bitwiseAnd at line 26. Possible FailurePath: [L11] static const float one_modf = 1.0; [L80] float x = 0.0f / 0.0f; [L81] float iptr; [L82] CALL, EXPR modf_float(x, &iptr) [L14] __int32_t i0, j0; [L15] __uint32_t i; [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (i0) = gf_u.word [L21] j0 = ((i0 >> 23) & 0xff) - 0x7f [L22] COND TRUE j0 < 23 [L23] COND TRUE j0 < 0 [L25] ieee_float_shape_type sf_u; [L26] sf_u.word = (i0 & 0x80000000) [L27] EXPR sf_u.value [L27] (*iptr) = sf_u.value [L29] return x; [L82] RET, EXPR modf_float(x, &iptr) [L82] float res = modf_float(x, &iptr); [L85] EXPR \read(iptr) [L85] CALL, EXPR isnan_float(iptr) [L73] return x != x; [L85] RET, EXPR isnan_float(iptr) [L85] isnan_float(iptr) && !isnan_float(res) [L85] CALL, EXPR isnan_float(res) [L73] return x != x; [L85] RET, EXPR isnan_float(res) [L85] isnan_float(iptr) && !isnan_float(res) [L85] COND TRUE isnan_float(iptr) && !isnan_float(res) [L86] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 82 SDtfs, 50 SDslu, 35 SDs, 0 SdLazy, 146 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 2478 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...