/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --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_1252b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 08:51:57,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 08:51:57,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 08:51:57,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 08:51:57,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 08:51:57,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 08:51:57,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 08:51:57,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 08:51:57,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 08:51:57,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 08:51:57,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 08:51:57,097 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 08:51:57,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 08:51:57,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 08:51:57,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 08:51:57,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 08:51:57,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 08:51:57,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 08:51:57,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 08:51:57,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 08:51:57,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 08:51:57,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 08:51:57,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 08:51:57,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 08:51:57,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 08:51:57,139 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 08:51:57,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 08:51:57,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 08:51:57,147 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 08:51:57,148 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 08:51:57,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 08:51:57,152 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 08:51:57,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 08:51:57,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 08:51:57,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 08:51:57,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 08:51:57,159 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 08:51:57,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 08:51:57,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 08:51:57,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 08:51:57,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 08:51:57,163 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 [2020-09-25 08:51:57,209 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 08:51:57,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 08:51:57,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 08:51:57,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 08:51:57,212 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 08:51:57,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 08:51:57,212 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 08:51:57,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 08:51:57,213 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 08:51:57,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 08:51:57,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 08:51:57,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 08:51:57,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 08:51:57,216 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 08:51:57,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 08:51:57,217 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 08:51:57,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 08:51:57,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 08:51:57,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 08:51:57,217 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 08:51:57,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 08:51:57,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 08:51:57,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 08:51:57,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 08:51:57,221 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 08:51:57,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 08:51:57,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 08:51:57,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 08:51:57,222 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 08:51:57,222 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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-09-25 08:51:57,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 08:51:57,716 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 08:51:57,722 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 08:51:57,724 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 08:51:57,724 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 08:51:57,725 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c [2020-09-25 08:51:57,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/faa077b43/b65704bf12b34309a9883c715f0a8b4b/FLAG4c1e1e2e5 [2020-09-25 08:51:58,344 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 08:51:58,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c [2020-09-25 08:51:58,352 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/faa077b43/b65704bf12b34309a9883c715f0a8b4b/FLAG4c1e1e2e5 [2020-09-25 08:51:58,694 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/faa077b43/b65704bf12b34309a9883c715f0a8b4b [2020-09-25 08:51:58,710 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 08:51:58,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 08:51:58,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 08:51:58,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 08:51:58,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 08:51:58,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:51:58" (1/1) ... [2020-09-25 08:51:58,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53afdaf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:58, skipping insertion in model container [2020-09-25 08:51:58,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:51:58" (1/1) ... [2020-09-25 08:51:58,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 08:51:58,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 08:51:59,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:51:59,012 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 08:51:59,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:51:59,073 INFO L208 MainTranslator]: Completed translation [2020-09-25 08:51:59,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:59 WrapperNode [2020-09-25 08:51:59,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 08:51:59,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 08:51:59,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 08:51:59,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 08:51:59,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:59" (1/1) ... [2020-09-25 08:51:59,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:59" (1/1) ... [2020-09-25 08:51:59,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:59" (1/1) ... [2020-09-25 08:51:59,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:59" (1/1) ... [2020-09-25 08:51:59,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:59" (1/1) ... [2020-09-25 08:51:59,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:59" (1/1) ... [2020-09-25 08:51:59,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:59" (1/1) ... [2020-09-25 08:51:59,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 08:51:59,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 08:51:59,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 08:51:59,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 08:51:59,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:59" (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 [2020-09-25 08:51:59,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 08:51:59,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 08:51:59,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2020-09-25 08:51:59,286 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2020-09-25 08:51:59,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-09-25 08:51:59,286 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 08:51:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 08:51:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-09-25 08:51:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2020-09-25 08:51:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 08:51:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-25 08:51:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 08:51:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 08:51:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2020-09-25 08:51:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-09-25 08:51:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 08:51:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 08:51:59,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 08:51:59,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-25 08:51:59,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 08:51:59,691 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 08:51:59,691 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-25 08:51:59,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:51:59 BoogieIcfgContainer [2020-09-25 08:51:59,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 08:51:59,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 08:51:59,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 08:51:59,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 08:51:59,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 08:51:58" (1/3) ... [2020-09-25 08:51:59,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@199651cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:51:59, skipping insertion in model container [2020-09-25 08:51:59,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:59" (2/3) ... [2020-09-25 08:51:59,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@199651cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:51:59, skipping insertion in model container [2020-09-25 08:51:59,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:51:59" (3/3) ... [2020-09-25 08:51:59,710 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2020-09-25 08:51:59,721 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 08:51:59,730 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 08:51:59,750 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 08:51:59,780 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 08:51:59,780 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 08:51:59,781 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 08:51:59,781 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 08:51:59,781 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 08:51:59,781 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 08:51:59,781 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 08:51:59,781 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 08:51:59,806 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states. [2020-09-25 08:51:59,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 08:51:59,815 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:51:59,816 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] [2020-09-25 08:51:59,817 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:51:59,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:51:59,824 INFO L82 PathProgramCache]: Analyzing trace with hash 2131665852, now seen corresponding path program 1 times [2020-09-25 08:51:59,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:51:59,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715252410] [2020-09-25 08:51:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:51:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:52:00,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:52:00,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:52:00,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:52:00,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-25 08:52:00,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:52:00,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-09-25 08:52:00,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:52:00,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:52:00,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:52:00,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-25 08:52:00,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:52:00,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 08:52:00,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:52:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:52:00,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:52:00,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:52:00,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:52:00,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:52:00,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 08:52:00,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:52:00,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:52:00,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:52:00,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:52:00,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:52:00,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:52:00,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 08:52:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:52:00,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:52:00,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:52:00,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:52:00,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 08:52:00,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:52:00,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 08:52:00,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:52:00,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:52:00,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:52:00,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 08:52:00,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:52:00,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:52:00,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 08:52:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:52:00,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:52:00,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:52:00,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 08:52:00,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:52:00,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 08:52:00,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:52:00,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:52:00,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:52:00,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-09-25 08:52:00,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:52:00,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:52:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:52:00,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715252410] [2020-09-25 08:52:00,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:52:00,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 08:52:00,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289319723] [2020-09-25 08:52:00,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 08:52:00,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:52:00,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 08:52:00,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 08:52:00,621 INFO L87 Difference]: Start difference. First operand 89 states. Second operand 4 states. [2020-09-25 08:52:00,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:52:00,980 INFO L93 Difference]: Finished difference Result 164 states and 192 transitions. [2020-09-25 08:52:00,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 08:52:00,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-09-25 08:52:00,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:52:01,002 INFO L225 Difference]: With dead ends: 164 [2020-09-25 08:52:01,003 INFO L226 Difference]: Without dead ends: 81 [2020-09-25 08:52:01,010 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 [2020-09-25 08:52:01,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-25 08:52:01,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-09-25 08:52:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-25 08:52:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-09-25 08:52:01,090 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 34 [2020-09-25 08:52:01,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:52:01,091 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-09-25 08:52:01,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 08:52:01,091 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-09-25 08:52:01,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 08:52:01,094 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:52:01,094 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, 1, 1, 1, 1] [2020-09-25 08:52:01,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 08:52:01,095 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:52:01,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:52:01,095 INFO L82 PathProgramCache]: Analyzing trace with hash -630897281, now seen corresponding path program 1 times [2020-09-25 08:52:01,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:52:01,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101738369] [2020-09-25 08:52:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:52:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:52:01,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:52:01,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:52:01,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 08:52:01,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:52:01,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-09-25 08:52:01,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:52:01,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:52:01,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:52:01,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-09-25 08:52:01,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 08:52:01,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:52:01,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:52:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:52:01,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:52:01,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:52:01,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:52:01,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:52:01,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 08:52:01,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:52:01,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:52:01,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:52:01,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:52:01,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:52:01,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:52:01,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 08:52:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:52:01,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:52:01,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:52:01,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 08:52:01,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:52:01,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-25 08:52:01,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:52:01,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:52:01,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:52:01,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 08:52:01,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 08:52:01,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:52:01,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 08:52:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:52:01,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:52:01,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:52:01,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 08:52:01,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:52:01,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-09-25 08:52:01,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:52:01,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:52:01,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:52:01,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:52:01,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 08:52:01,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:52:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:52:01,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101738369] [2020-09-25 08:52:01,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:52:01,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 08:52:01,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267699913] [2020-09-25 08:52:01,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 08:52:01,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:52:01,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 08:52:01,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 08:52:01,556 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 6 states. [2020-09-25 08:52:01,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:52:01,794 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2020-09-25 08:52:01,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 08:52:01,795 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-09-25 08:52:01,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:52:01,799 INFO L225 Difference]: With dead ends: 117 [2020-09-25 08:52:01,800 INFO L226 Difference]: Without dead ends: 86 [2020-09-25 08:52:01,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-25 08:52:01,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-25 08:52:01,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-09-25 08:52:01,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 08:52:01,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-09-25 08:52:01,818 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 43 [2020-09-25 08:52:01,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:52:01,818 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-09-25 08:52:01,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 08:52:01,819 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-09-25 08:52:01,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 08:52:01,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:52:01,821 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:52:01,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 08:52:01,821 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:52:01,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:52:01,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1681903777, now seen corresponding path program 1 times [2020-09-25 08:52:01,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:52:01,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187183767] [2020-09-25 08:52:01,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:52:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:52:01,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:52:02,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:52:02,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 08:52:02,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:52:02,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-09-25 08:52:02,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:52:02,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:52:02,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:52:02,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 08:52:02,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 08:52:02,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:52:02,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:52:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:52:02,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:52:02,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:52:02,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:52:02,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:52:02,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 08:52:02,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:52:02,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:52:02,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:52:02,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:52:02,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:52:02,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 08:52:02,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 08:52:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:52:02,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:52:02,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:52:02,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 08:52:02,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:52:02,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-09-25 08:52:02,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:52:02,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:52:02,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:52:02,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 08:52:02,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 08:52:02,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:52:02,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 08:52:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:52:02,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:52:02,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:52:02,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 08:52:02,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:52:02,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-25 08:52:02,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:52:02,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:52:02,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:52:02,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:52:02,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 08:52:02,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:52:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:52:02,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187183767] [2020-09-25 08:52:02,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:52:02,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 08:52:02,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65407985] [2020-09-25 08:52:02,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 08:52:02,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:52:02,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 08:52:02,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 08:52:02,401 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 6 states. [2020-09-25 08:52:02,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:52:02,668 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2020-09-25 08:52:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 08:52:02,670 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-09-25 08:52:02,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:52:02,674 INFO L225 Difference]: With dead ends: 121 [2020-09-25 08:52:02,675 INFO L226 Difference]: Without dead ends: 90 [2020-09-25 08:52:02,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-25 08:52:02,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-25 08:52:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2020-09-25 08:52:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 08:52:02,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-09-25 08:52:02,703 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 46 [2020-09-25 08:52:02,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:52:02,704 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-09-25 08:52:02,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 08:52:02,704 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-09-25 08:52:02,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 08:52:02,708 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:52:02,709 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:52:02,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 08:52:02,709 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:52:02,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:52:02,712 INFO L82 PathProgramCache]: Analyzing trace with hash -969429089, now seen corresponding path program 1 times [2020-09-25 08:52:02,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:52:02,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585964972] [2020-09-25 08:52:02,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:52:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 08:52:02,753 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 08:52:02,753 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 08:52:02,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 08:52:02,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 08:52:02 BoogieIcfgContainer [2020-09-25 08:52:02,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 08:52:02,793 INFO L168 Benchmark]: Toolchain (without parser) took 4079.10 ms. Allocated memory was 140.5 MB in the beginning and 245.4 MB in the end (delta: 104.9 MB). Free memory was 104.0 MB in the beginning and 178.2 MB in the end (delta: -74.1 MB). Peak memory consumption was 30.7 MB. Max. memory is 7.1 GB. [2020-09-25 08:52:02,795 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 08:52:02,796 INFO L168 Benchmark]: CACSL2BoogieTranslator took 356.22 ms. Allocated memory is still 140.5 MB. Free memory was 103.3 MB in the beginning and 92.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-09-25 08:52:02,798 INFO L168 Benchmark]: Boogie Preprocessor took 130.96 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.5 MB in the beginning and 180.6 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-09-25 08:52:02,799 INFO L168 Benchmark]: RCFGBuilder took 494.04 ms. Allocated memory is still 203.4 MB. Free memory was 180.6 MB in the beginning and 156.9 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-09-25 08:52:02,805 INFO L168 Benchmark]: TraceAbstraction took 3088.02 ms. Allocated memory was 203.4 MB in the beginning and 245.4 MB in the end (delta: 41.9 MB). Free memory was 156.9 MB in the beginning and 178.2 MB in the end (delta: -21.3 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-09-25 08:52:02,817 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 356.22 ms. Allocated memory is still 140.5 MB. Free memory was 103.3 MB in the beginning and 92.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.96 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.5 MB in the beginning and 180.6 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 494.04 ms. Allocated memory is still 203.4 MB. Free memory was 180.6 MB in the beginning and 156.9 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3088.02 ms. Allocated memory was 203.4 MB in the beginning and 245.4 MB in the end (delta: 41.9 MB). Free memory was 156.9 MB in the beginning and 178.2 MB in the end (delta: -21.3 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 79]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 78, overapproximation of someUnaryFLOAToperation at line 74. Possible FailurePath: [L73] float x = 0.0f; [L74] float y = -0.0f; [L75] CALL, EXPR fmax_float(x, y) [L44] CALL, EXPR __fpclassify_float(x) [L21] __uint32_t w; [L24] ieee_float_shape_type gf_u; [L25] gf_u.value = (x) [L26] EXPR gf_u.word [L26] (w) = gf_u.word [L29] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L31-L32] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L34-L35] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L37] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L40] return 0; [L44] RET, EXPR __fpclassify_float(x) [L44] COND TRUE __fpclassify_float(x) == 0 [L45] return y; [L75] RET, EXPR fmax_float(x, y) [L75] float res = fmax_float(x, y); [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L78] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L79] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 89 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.9s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 267 SDtfs, 53 SDslu, 494 SDs, 0 SdLazy, 352 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred 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: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 169 NumberOfCodeBlocks, 169 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 120 ConstructedInterpolants, 0 QuantifiedInterpolants, 9534 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...