/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --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_1031.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:30:30,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:30:30,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:30:30,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:30:30,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:30:30,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:30:30,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:30:30,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:30:30,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:30:30,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:30:30,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:30:30,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:30:30,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:30:30,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:30:30,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:30:30,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:30:30,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:30:30,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:30:30,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:30:30,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:30:30,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:30:30,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:30:30,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:30:30,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:30:30,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:30:30,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:30:30,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:30:30,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:30:30,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:30:30,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:30:30,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:30:30,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:30:30,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:30:30,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:30:30,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:30:30,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:30:30,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:30:30,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:30:30,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:30:30,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:30:30,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:30:30,605 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 [2020-09-24 21:30:30,632 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:30:30,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:30:30,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:30:30,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:30:30,634 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:30:30,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:30:30,638 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:30:30,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:30:30,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:30:30,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:30:30,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:30:30,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:30:30,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:30:30,639 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:30:30,640 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:30:30,640 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:30:30,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:30:30,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:30:30,641 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:30:30,641 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:30:30,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:30:30,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:30:30,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:30:30,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:30:30,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:30:30,642 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:30:30,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:30:30,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:30:30,643 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:30:30,643 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.rcfgbuilder: Size of a code block -> SingleStatement 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:30:31,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:30:31,160 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:30:31,164 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:30:31,166 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:30:31,167 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:30:31,168 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1031.c [2020-09-24 21:30:31,242 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc11a4ec4/35514ab5eff74f53a67d6a7f91ebd764/FLAGda0b50db1 [2020-09-24 21:30:31,855 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:30:31,856 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1031.c [2020-09-24 21:30:31,867 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc11a4ec4/35514ab5eff74f53a67d6a7f91ebd764/FLAGda0b50db1 [2020-09-24 21:30:32,153 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc11a4ec4/35514ab5eff74f53a67d6a7f91ebd764 [2020-09-24 21:30:32,167 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:30:32,172 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:30:32,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:30:32,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:30:32,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:30:32,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:30:32" (1/1) ... [2020-09-24 21:30:32,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d574d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:32, skipping insertion in model container [2020-09-24 21:30:32,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:30:32" (1/1) ... [2020-09-24 21:30:32,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:30:32,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:30:32,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:30:32,482 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:30:32,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:30:32,541 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:30:32,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:32 WrapperNode [2020-09-24 21:30:32,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:30:32,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:30:32,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:30:32,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:30:32,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:32" (1/1) ... [2020-09-24 21:30:32,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:32" (1/1) ... [2020-09-24 21:30:32,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:32" (1/1) ... [2020-09-24 21:30:32,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:32" (1/1) ... [2020-09-24 21:30:32,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:32" (1/1) ... [2020-09-24 21:30:32,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:32" (1/1) ... [2020-09-24 21:30:32,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:32" (1/1) ... [2020-09-24 21:30:32,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:30:32,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:30:32,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:30:32,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:30:32,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:32" (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 [2020-09-24 21:30:32,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:30:32,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:30:32,741 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2020-09-24 21:30:32,742 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-09-24 21:30:32,742 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:30:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:30:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2020-09-24 21:30:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 21:30:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-24 21:30:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 21:30:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:30:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 21:30:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-24 21:30:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-09-24 21:30:32,744 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:30:32,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:30:32,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:30:33,077 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:30:33,077 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-24 21:30:33,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:30:33 BoogieIcfgContainer [2020-09-24 21:30:33,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:30:33,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:30:33,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:30:33,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:30:33,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:30:32" (1/3) ... [2020-09-24 21:30:33,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c62e48e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:30:33, skipping insertion in model container [2020-09-24 21:30:33,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:32" (2/3) ... [2020-09-24 21:30:33,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c62e48e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:30:33, skipping insertion in model container [2020-09-24 21:30:33,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:30:33" (3/3) ... [2020-09-24 21:30:33,094 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1031.c [2020-09-24 21:30:33,108 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:30:33,119 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:30:33,145 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:30:33,185 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:30:33,186 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:30:33,186 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:30:33,186 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:30:33,186 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:30:33,186 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:30:33,186 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:30:33,186 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:30:33,218 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-09-24 21:30:33,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 21:30:33,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:30:33,230 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, 1, 1, 1] [2020-09-24 21:30:33,230 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:30:33,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:30:33,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1002488425, now seen corresponding path program 1 times [2020-09-24 21:30:33,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:30:33,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230722057] [2020-09-24 21:30:33,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:30:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:33,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:33,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:33,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-24 21:30:33,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:30:33,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-09-24 21:30:33,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:33,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:30:33,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:30:33,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:30:33,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:30:33,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:30:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:33,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:33,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:33,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:30:33,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:30:33,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 21:30:33,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:33,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:30:33,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:30:33,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:30:33,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:30:33,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 21:30:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:33,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:33,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:33,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-24 21:30:33,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:30:33,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-24 21:30:33,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:33,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:30:33,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-24 21:30:33,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:30:33,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:30:33,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 21:30:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:33,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:33,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:33,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:30:33,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:30:33,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:30:33,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:33,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:30:33,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 21:30:33,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:30:33,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:30:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:30:33,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230722057] [2020-09-24 21:30:33,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:30:33,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 21:30:33,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271543188] [2020-09-24 21:30:33,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 21:30:33,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:30:33,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 21:30:33,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:30:33,790 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-09-24 21:30:34,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:30:34,042 INFO L93 Difference]: Finished difference Result 123 states and 141 transitions. [2020-09-24 21:30:34,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 21:30:34,044 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-09-24 21:30:34,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:30:34,060 INFO L225 Difference]: With dead ends: 123 [2020-09-24 21:30:34,061 INFO L226 Difference]: Without dead ends: 61 [2020-09-24 21:30:34,065 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 [2020-09-24 21:30:34,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-24 21:30:34,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-09-24 21:30:34,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-24 21:30:34,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-09-24 21:30:34,124 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 30 [2020-09-24 21:30:34,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:30:34,125 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-09-24 21:30:34,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 21:30:34,125 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-09-24 21:30:34,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-24 21:30:34,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:30:34,127 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:30:34,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:30:34,128 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:30:34,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:30:34,129 INFO L82 PathProgramCache]: Analyzing trace with hash 615125563, now seen corresponding path program 1 times [2020-09-24 21:30:34,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:30:34,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928099316] [2020-09-24 21:30:34,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:30:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 21:30:34,173 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 21:30:34,174 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 21:30:34,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:30:34,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:30:34 BoogieIcfgContainer [2020-09-24 21:30:34,204 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:30:34,208 INFO L168 Benchmark]: Toolchain (without parser) took 2037.13 ms. Allocated memory was 109.1 MB in the beginning and 184.5 MB in the end (delta: 75.5 MB). Free memory was 73.9 MB in the beginning and 144.0 MB in the end (delta: -70.1 MB). Peak memory consumption was 5.4 MB. Max. memory is 7.1 GB. [2020-09-24 21:30:34,209 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 109.1 MB. Free memory was 91.1 MB in the beginning and 91.0 MB in the end (delta: 105.2 kB). Peak memory consumption was 105.2 kB. Max. memory is 7.1 GB. [2020-09-24 21:30:34,210 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.70 ms. Allocated memory was 109.1 MB in the beginning and 122.7 MB in the end (delta: 13.6 MB). Free memory was 73.3 MB in the beginning and 98.1 MB in the end (delta: -24.9 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-09-24 21:30:34,211 INFO L168 Benchmark]: Boogie Preprocessor took 117.85 ms. Allocated memory was 122.7 MB in the beginning and 165.2 MB in the end (delta: 42.5 MB). Free memory was 97.8 MB in the beginning and 150.1 MB in the end (delta: -52.3 MB). Peak memory consumption was 73.7 kB. Max. memory is 7.1 GB. [2020-09-24 21:30:34,212 INFO L168 Benchmark]: RCFGBuilder took 424.17 ms. Allocated memory is still 165.2 MB. Free memory was 150.1 MB in the beginning and 130.0 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-09-24 21:30:34,213 INFO L168 Benchmark]: TraceAbstraction took 1117.66 ms. Allocated memory was 165.2 MB in the beginning and 184.5 MB in the end (delta: 19.4 MB). Free memory was 129.1 MB in the beginning and 144.0 MB in the end (delta: -14.9 MB). Peak memory consumption was 4.5 MB. Max. memory is 7.1 GB. [2020-09-24 21:30:34,218 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 109.1 MB. Free memory was 91.1 MB in the beginning and 91.0 MB in the end (delta: 105.2 kB). Peak memory consumption was 105.2 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 368.70 ms. Allocated memory was 109.1 MB in the beginning and 122.7 MB in the end (delta: 13.6 MB). Free memory was 73.3 MB in the beginning and 98.1 MB in the end (delta: -24.9 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.85 ms. Allocated memory was 122.7 MB in the beginning and 165.2 MB in the end (delta: 42.5 MB). Free memory was 97.8 MB in the beginning and 150.1 MB in the end (delta: -52.3 MB). Peak memory consumption was 73.7 kB. Max. memory is 7.1 GB. * RCFGBuilder took 424.17 ms. Allocated memory is still 165.2 MB. Free memory was 150.1 MB in the beginning and 130.0 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1117.66 ms. Allocated memory was 165.2 MB in the beginning and 184.5 MB in the end (delta: 19.4 MB). Free memory was 129.1 MB in the beginning and 144.0 MB in the end (delta: -14.9 MB). Peak memory consumption was 4.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 70]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 55, overapproximation of someBinaryArithmeticFLOAToperation at line 42, overapproximation of bitwiseAnd at line 22. Possible FailurePath: [L65] float x = 0.0f / 0.0f; [L66] CALL, EXPR round_float(x) [L12] __uint32_t w; [L14] int exponent_less_127; [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (w) = gf_u.word [L22] exponent_less_127 = (int)((w & 0x7f800000) >> 23) - 127 [L24] COND FALSE !(exponent_less_127 < 23) [L40] COND TRUE exponent_less_127 == 128 [L42] return x + x; [L66] RET, EXPR round_float(x) [L66] float res = round_float(x); [L69] CALL, EXPR isnan_float(res) [L55] return x != x; [L69] RET, EXPR isnan_float(res) [L69] COND TRUE !isnan_float(res) [L70] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 68 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 69 SDtfs, 15 SDslu, 49 SDs, 0 SdLazy, 72 SolverSat, 6 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, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred 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, 0.3s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 29 ConstructedInterpolants, 0 QuantifiedInterpolants, 1450 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...