/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=HIGHLEXORDER --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_1211b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:54:25,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:54:25,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:54:25,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:54:25,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:54:25,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:54:25,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:54:25,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:54:25,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:54:25,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:54:25,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:54:25,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:54:25,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:54:25,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:54:25,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:54:25,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:54:25,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:54:25,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:54:25,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:54:25,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:54:25,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:54:25,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:54:25,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:54:25,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:54:25,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:54:25,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:54:25,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:54:25,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:54:25,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:54:25,223 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:54:25,223 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:54:25,224 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:54:25,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:54:25,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:54:25,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:54:25,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:54:25,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:54:25,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:54:25,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:54:25,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:54:25,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:54:25,236 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 [2020-08-21 18:54:25,274 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:54:25,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:54:25,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:54:25,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:54:25,276 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:54:25,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:54:25,277 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:54:25,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:54:25,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:54:25,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:54:25,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:54:25,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:54:25,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:54:25,279 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:54:25,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:54:25,279 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:54:25,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:54:25,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:54:25,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:54:25,280 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:54:25,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:54:25,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:54:25,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:54:25,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:54:25,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:54:25,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:54:25,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:54:25,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:54:25,282 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:54:25,282 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=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-08-21 18:54:25,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:54:25,603 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:54:25,607 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:54:25,609 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:54:25,609 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:54:25,610 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1211b.c [2020-08-21 18:54:25,682 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36f9a0af1/6b9a1478867147dcb5a88243ab492bfc/FLAG9b687ee3a [2020-08-21 18:54:26,163 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:54:26,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1211b.c [2020-08-21 18:54:26,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36f9a0af1/6b9a1478867147dcb5a88243ab492bfc/FLAG9b687ee3a [2020-08-21 18:54:26,566 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36f9a0af1/6b9a1478867147dcb5a88243ab492bfc [2020-08-21 18:54:26,575 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:54:26,577 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:54:26,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:54:26,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:54:26,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:54:26,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:54:26" (1/1) ... [2020-08-21 18:54:26,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ef001ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:26, skipping insertion in model container [2020-08-21 18:54:26,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:54:26" (1/1) ... [2020-08-21 18:54:26,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:54:26,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:54:26,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:54:26,884 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:54:27,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:54:27,035 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:54:27,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:27 WrapperNode [2020-08-21 18:54:27,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:54:27,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:54:27,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:54:27,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:54:27,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:27" (1/1) ... [2020-08-21 18:54:27,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:27" (1/1) ... [2020-08-21 18:54:27,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:27" (1/1) ... [2020-08-21 18:54:27,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:27" (1/1) ... [2020-08-21 18:54:27,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:27" (1/1) ... [2020-08-21 18:54:27,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:27" (1/1) ... [2020-08-21 18:54:27,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:27" (1/1) ... [2020-08-21 18:54:27,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:54:27,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:54:27,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:54:27,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:54:27,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:27" (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 [2020-08-21 18:54:27,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:54:27,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:54:27,158 INFO L138 BoogieDeclarations]: Found implementation of procedure modf_float [2020-08-21 18:54:27,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-21 18:54:27,159 INFO L138 BoogieDeclarations]: Found implementation of procedure isinf_float [2020-08-21 18:54:27,159 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:54:27,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:54:27,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-21 18:54:27,159 INFO L130 BoogieDeclarations]: Found specification of procedure modf_float [2020-08-21 18:54:27,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 18:54:27,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-21 18:54:27,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 18:54:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 18:54:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 18:54:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-21 18:54:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-21 18:54:27,166 INFO L130 BoogieDeclarations]: Found specification of procedure isinf_float [2020-08-21 18:54:27,166 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:54:27,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-08-21 18:54:27,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:54:27,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:54:27,715 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:54:27,715 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-08-21 18:54:27,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:54:27 BoogieIcfgContainer [2020-08-21 18:54:27,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:54:27,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:54:27,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:54:27,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:54:27,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:54:26" (1/3) ... [2020-08-21 18:54:27,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5902bab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:54:27, skipping insertion in model container [2020-08-21 18:54:27,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:27" (2/3) ... [2020-08-21 18:54:27,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5902bab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:54:27, skipping insertion in model container [2020-08-21 18:54:27,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:54:27" (3/3) ... [2020-08-21 18:54:27,729 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1211b.c [2020-08-21 18:54:27,738 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:54:27,747 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:54:27,757 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:54:27,777 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:54:27,778 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:54:27,778 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:54:27,778 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:54:27,778 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:54:27,778 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:54:27,779 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:54:27,779 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:54:27,805 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-08-21 18:54:27,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 18:54:27,814 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:27,815 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] [2020-08-21 18:54:27,816 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:27,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:27,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1328912444, now seen corresponding path program 1 times [2020-08-21 18:54:27,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:27,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548196025] [2020-08-21 18:54:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:28,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:28,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:54:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:28,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 18:54:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:54:28,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548196025] [2020-08-21 18:54:28,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:54:28,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 18:54:28,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701024917] [2020-08-21 18:54:28,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 18:54:28,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:28,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 18:54:28,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 18:54:28,148 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 4 states. [2020-08-21 18:54:28,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:28,461 INFO L93 Difference]: Finished difference Result 110 states and 158 transitions. [2020-08-21 18:54:28,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 18:54:28,463 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-08-21 18:54:28,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:28,474 INFO L225 Difference]: With dead ends: 110 [2020-08-21 18:54:28,475 INFO L226 Difference]: Without dead ends: 55 [2020-08-21 18:54:28,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:54:28,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-21 18:54:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-21 18:54:28,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-21 18:54:28,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-08-21 18:54:28,528 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 27 [2020-08-21 18:54:28,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:28,529 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-08-21 18:54:28,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 18:54:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-08-21 18:54:28,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 18:54:28,531 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:28,531 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] [2020-08-21 18:54:28,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:54:28,532 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:28,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:28,532 INFO L82 PathProgramCache]: Analyzing trace with hash -2017954314, now seen corresponding path program 1 times [2020-08-21 18:54:28,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:28,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839033836] [2020-08-21 18:54:28,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:28,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:54:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:28,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:54:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:28,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:54:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:54:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:54:28,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839033836] [2020-08-21 18:54:28,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:54:28,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 18:54:28,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840867955] [2020-08-21 18:54:28,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:54:28,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:54:28,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:54:28,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:54:28,758 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 5 states. [2020-08-21 18:54:28,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:54:28,963 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-08-21 18:54:28,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:54:28,963 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-21 18:54:28,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:54:28,965 INFO L225 Difference]: With dead ends: 58 [2020-08-21 18:54:28,966 INFO L226 Difference]: Without dead ends: 55 [2020-08-21 18:54:28,967 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 [2020-08-21 18:54:28,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-21 18:54:28,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-21 18:54:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-21 18:54:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-08-21 18:54:28,977 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 30 [2020-08-21 18:54:28,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:54:28,977 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-08-21 18:54:28,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:54:28,978 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-08-21 18:54:28,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-21 18:54:28,979 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:28,979 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] [2020-08-21 18:54:28,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:54:28,980 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:28,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:28,980 INFO L82 PathProgramCache]: Analyzing trace with hash 2060718957, now seen corresponding path program 1 times [2020-08-21 18:54:28,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:28,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460779784] [2020-08-21 18:54:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 18:54:29,047 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 18:54:29,048 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 18:54:29,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:54:29,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:54:29 BoogieIcfgContainer [2020-08-21 18:54:29,083 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:54:29,086 INFO L168 Benchmark]: Toolchain (without parser) took 2508.80 ms. Allocated memory was 141.6 MB in the beginning and 233.8 MB in the end (delta: 92.3 MB). Free memory was 104.8 MB in the beginning and 167.0 MB in the end (delta: -62.3 MB). Peak memory consumption was 30.0 MB. Max. memory is 7.1 GB. [2020-08-21 18:54:29,088 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 18:54:29,089 INFO L168 Benchmark]: CACSL2BoogieTranslator took 458.24 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 104.5 MB in the beginning and 182.3 MB in the end (delta: -77.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-08-21 18:54:29,089 INFO L168 Benchmark]: Boogie Preprocessor took 57.29 ms. Allocated memory is still 205.0 MB. Free memory was 182.3 MB in the beginning and 180.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-08-21 18:54:29,090 INFO L168 Benchmark]: RCFGBuilder took 626.21 ms. Allocated memory is still 205.0 MB. Free memory was 179.8 MB in the beginning and 151.3 MB in the end (delta: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. [2020-08-21 18:54:29,091 INFO L168 Benchmark]: TraceAbstraction took 1362.52 ms. Allocated memory was 205.0 MB in the beginning and 233.8 MB in the end (delta: 28.8 MB). Free memory was 150.7 MB in the beginning and 167.0 MB in the end (delta: -16.3 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-21 18:54:29,096 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 458.24 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 104.5 MB in the beginning and 182.3 MB in the end (delta: -77.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 57.29 ms. Allocated memory is still 205.0 MB. Free memory was 182.3 MB in the beginning and 180.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 626.21 ms. Allocated memory is still 205.0 MB. Free memory was 179.8 MB in the beginning and 151.3 MB in the end (delta: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1362.52 ms. Allocated memory was 205.0 MB in the beginning and 233.8 MB in the end (delta: 28.8 MB). Free memory was 150.7 MB in the beginning and 167.0 MB in the end (delta: -16.3 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 110]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 109, overapproximation of someBinaryArithmeticFLOAToperation at line 104, overapproximation of bitwiseAnd at line 93. Possible FailurePath: [L12] static const float one_modf = 1.0; [L104] float x = -1.0f / 0.0f; [L105] float iptr = __VERIFIER_nondet_float(); [L106] CALL, EXPR modf_float(x, &iptr) [L15] __int32_t i0, j0; [L16] __uint32_t i; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (i0) = gf_u.word [L22] j0 = ((i0 >> 23) & 0xff) - 0x7f [L23] COND TRUE j0 < 23 [L24] COND TRUE j0 < 0 [L26] ieee_float_shape_type sf_u; [L27] sf_u.word = (i0 & 0x80000000) [L28] EXPR sf_u.value [L28] (*iptr) = sf_u.value [L30] return x; [L106] RET, EXPR modf_float(x, &iptr) [L106] float res = modf_float(x, &iptr); [L109] EXPR \read(iptr) [L109] CALL, EXPR isinf_float(iptr) [L87] __int32_t ix; [L89] ieee_float_shape_type gf_u; [L90] gf_u.value = (x) [L91] EXPR gf_u.word [L91] (ix) = gf_u.word [L93] ix &= 0x7fffffff [L94] return ((ix) == 0x7f800000L); [L109] RET, EXPR isinf_float(iptr) [L109] isinf_float(iptr) && !(res == -0.0f && __signbit_float(res) == 1) [L109] EXPR res == -0.0f && __signbit_float(res) == 1 [L109] isinf_float(iptr) && !(res == -0.0f && __signbit_float(res) == 1) [L109] COND TRUE isinf_float(iptr) && !(res == -0.0f && __signbit_float(res) == 1) [L110] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 100 SDtfs, 62 SDslu, 44 SDs, 0 SdLazy, 180 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred 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, 89 NumberOfCodeBlocks, 89 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 3526 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...