/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_0720.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 08:51:36,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 08:51:36,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 08:51:36,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 08:51:36,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 08:51:36,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 08:51:36,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 08:51:36,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 08:51:36,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 08:51:36,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 08:51:36,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 08:51:36,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 08:51:36,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 08:51:36,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 08:51:36,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 08:51:36,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 08:51:36,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 08:51:36,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 08:51:36,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 08:51:36,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 08:51:36,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 08:51:36,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 08:51:36,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 08:51:36,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 08:51:36,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 08:51:36,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 08:51:36,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 08:51:36,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 08:51:36,152 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 08:51:36,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 08:51:36,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 08:51:36,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 08:51:36,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 08:51:36,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 08:51:36,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 08:51:36,157 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 08:51:36,158 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 08:51:36,158 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 08:51:36,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 08:51:36,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 08:51:36,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 08:51:36,162 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 08:51:36,190 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 08:51:36,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 08:51:36,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 08:51:36,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 08:51:36,192 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 08:51:36,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 08:51:36,192 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 08:51:36,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 08:51:36,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 08:51:36,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 08:51:36,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 08:51:36,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 08:51:36,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 08:51:36,197 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 08:51:36,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 08:51:36,197 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 08:51:36,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 08:51:36,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 08:51:36,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 08:51:36,198 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 08:51:36,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 08:51:36,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 08:51:36,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 08:51:36,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 08:51:36,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 08:51:36,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 08:51:36,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 08:51:36,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 08:51:36,200 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 08:51:36,200 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 08:51:36,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 08:51:36,697 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 08:51:36,704 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 08:51:36,706 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 08:51:36,706 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 08:51:36,707 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0720.c [2020-09-25 08:51:36,796 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38224ac88/a3a88a14a82c4e98b7ca12dfe7f6f6fb/FLAGbf2bb9137 [2020-09-25 08:51:37,362 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 08:51:37,363 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_0720.c [2020-09-25 08:51:37,373 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38224ac88/a3a88a14a82c4e98b7ca12dfe7f6f6fb/FLAGbf2bb9137 [2020-09-25 08:51:37,698 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38224ac88/a3a88a14a82c4e98b7ca12dfe7f6f6fb [2020-09-25 08:51:37,713 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 08:51:37,720 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 08:51:37,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 08:51:37,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 08:51:37,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 08:51:37,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:51:37" (1/1) ... [2020-09-25 08:51:37,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e48a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:37, skipping insertion in model container [2020-09-25 08:51:37,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:51:37" (1/1) ... [2020-09-25 08:51:37,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 08:51:37,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 08:51:38,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:51:38,028 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 08:51:38,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:51:38,176 INFO L208 MainTranslator]: Completed translation [2020-09-25 08:51:38,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:38 WrapperNode [2020-09-25 08:51:38,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 08:51:38,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 08:51:38,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 08:51:38,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 08:51:38,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:38" (1/1) ... [2020-09-25 08:51:38,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:38" (1/1) ... [2020-09-25 08:51:38,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:38" (1/1) ... [2020-09-25 08:51:38,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:38" (1/1) ... [2020-09-25 08:51:38,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:38" (1/1) ... [2020-09-25 08:51:38,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:38" (1/1) ... [2020-09-25 08:51:38,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:38" (1/1) ... [2020-09-25 08:51:38,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 08:51:38,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 08:51:38,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 08:51:38,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 08:51:38,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:38" (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 08:51:38,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 08:51:38,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 08:51:38,318 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-09-25 08:51:38,318 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2020-09-25 08:51:38,319 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 08:51:38,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 08:51:38,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-09-25 08:51:38,319 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-09-25 08:51:38,319 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2020-09-25 08:51:38,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 08:51:38,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-25 08:51:38,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 08:51:38,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 08:51:38,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 08:51:38,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-25 08:51:38,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 08:51:38,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 08:51:38,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 08:51:38,765 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 08:51:38,765 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-25 08:51:38,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:51:38 BoogieIcfgContainer [2020-09-25 08:51:38,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 08:51:38,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 08:51:38,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 08:51:38,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 08:51:38,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 08:51:37" (1/3) ... [2020-09-25 08:51:38,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6021710c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:51:38, skipping insertion in model container [2020-09-25 08:51:38,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:51:38" (2/3) ... [2020-09-25 08:51:38,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6021710c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:51:38, skipping insertion in model container [2020-09-25 08:51:38,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:51:38" (3/3) ... [2020-09-25 08:51:38,799 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_0720.c [2020-09-25 08:51:38,825 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 08:51:38,843 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 08:51:38,879 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 08:51:38,910 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 08:51:38,911 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 08:51:38,911 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 08:51:38,911 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 08:51:38,911 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 08:51:38,911 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 08:51:38,911 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 08:51:38,912 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 08:51:38,937 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2020-09-25 08:51:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-25 08:51:38,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:51:38,948 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] [2020-09-25 08:51:38,949 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:51:38,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:51:38,956 INFO L82 PathProgramCache]: Analyzing trace with hash -2082497467, now seen corresponding path program 1 times [2020-09-25 08:51:38,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:51:38,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277872422] [2020-09-25 08:51:38,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:51:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:51:39,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:51:39,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:51:39,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 08:51:39,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:51:39,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-09-25 08:51:39,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:51:39,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:51:39,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:51:39,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-25 08:51:39,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:51:39,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 08:51:39,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:51:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:51:39,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:51:39,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:51:39,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 08:51:39,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:51:39,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 08:51:39,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:51:39,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:51:39,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:51:39,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:51:39,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:51:39,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:51:39,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 08:51:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:51:39,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:51:39,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:51:39,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 08:51:39,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:51:39,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-25 08:51:39,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:51:39,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:51:39,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:51:39,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 08:51:39,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:51:39,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:51:39,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-25 08:51:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:51:39,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:51:39,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:51:39,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:51:39,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:51:39,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 08:51:39,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:51:39,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:51:39,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:51:39,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 08:51:39,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:51:39,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 08:51:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:51:39,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277872422] [2020-09-25 08:51:39,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:51:39,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 08:51:39,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373076850] [2020-09-25 08:51:39,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 08:51:39,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:51:39,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 08:51:39,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 08:51:39,560 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 4 states. [2020-09-25 08:51:39,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:51:39,869 INFO L93 Difference]: Finished difference Result 188 states and 222 transitions. [2020-09-25 08:51:39,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 08:51:39,871 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-09-25 08:51:39,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:51:39,887 INFO L225 Difference]: With dead ends: 188 [2020-09-25 08:51:39,887 INFO L226 Difference]: Without dead ends: 98 [2020-09-25 08:51:39,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:51:39,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-25 08:51:39,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-09-25 08:51:39,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-25 08:51:39,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-09-25 08:51:39,954 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 38 [2020-09-25 08:51:39,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:51:39,955 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-09-25 08:51:39,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 08:51:39,955 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-09-25 08:51:39,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-25 08:51:39,957 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:51:39,958 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, 1] [2020-09-25 08:51:39,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 08:51:39,959 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:51:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:51:39,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1948696332, now seen corresponding path program 1 times [2020-09-25 08:51:39,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:51:39,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157374368] [2020-09-25 08:51:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:51:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 08:51:40,064 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 08:51:40,065 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 08:51:40,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 08:51:40,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 08:51:40 BoogieIcfgContainer [2020-09-25 08:51:40,106 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 08:51:40,109 INFO L168 Benchmark]: Toolchain (without parser) took 2392.47 ms. Allocated memory was 136.8 MB in the beginning and 227.5 MB in the end (delta: 90.7 MB). Free memory was 98.3 MB in the beginning and 194.8 MB in the end (delta: -96.6 MB). Peak memory consumption was 89.0 MB. Max. memory is 7.1 GB. [2020-09-25 08:51:40,110 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 136.8 MB. Free memory was 117.1 MB in the beginning and 116.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 08:51:40,111 INFO L168 Benchmark]: CACSL2BoogieTranslator took 455.57 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 97.6 MB in the beginning and 177.9 MB in the end (delta: -80.2 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2020-09-25 08:51:40,112 INFO L168 Benchmark]: Boogie Preprocessor took 60.21 ms. Allocated memory is still 199.8 MB. Free memory was 177.9 MB in the beginning and 175.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-09-25 08:51:40,112 INFO L168 Benchmark]: RCFGBuilder took 543.39 ms. Allocated memory is still 199.8 MB. Free memory was 175.4 MB in the beginning and 149.4 MB in the end (delta: 26.0 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. [2020-09-25 08:51:40,113 INFO L168 Benchmark]: TraceAbstraction took 1323.16 ms. Allocated memory was 199.8 MB in the beginning and 227.5 MB in the end (delta: 27.8 MB). Free memory was 149.4 MB in the beginning and 194.8 MB in the end (delta: -45.4 MB). Peak memory consumption was 77.2 MB. Max. memory is 7.1 GB. [2020-09-25 08:51:40,117 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 136.8 MB. Free memory was 117.1 MB in the beginning and 116.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 455.57 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 97.6 MB in the beginning and 177.9 MB in the end (delta: -80.2 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 60.21 ms. Allocated memory is still 199.8 MB. Free memory was 177.9 MB in the beginning and 175.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 543.39 ms. Allocated memory is still 199.8 MB. Free memory was 175.4 MB in the beginning and 149.4 MB in the end (delta: 26.0 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1323.16 ms. Allocated memory was 199.8 MB in the beginning and 227.5 MB in the end (delta: 27.8 MB). Free memory was 149.4 MB in the beginning and 194.8 MB in the end (delta: -45.4 MB). Peak memory consumption was 77.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 96]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 13, overapproximation of someBinaryArithmeticFLOAToperation at line 30, overapproximation of bitwiseAnd at line 27. Possible FailurePath: [L15] static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30; [L91] float x = 0.0f / 0.0f; [L92] CALL, EXPR __ieee754_sqrtf(x) [L18] float z; [L19] __uint32_t r, hx; [L20] __int32_t ix, s, q, m, t, i; [L23] ieee_float_shape_type gf_u; [L24] gf_u.value = (x) [L25] EXPR gf_u.word [L25] (ix) = gf_u.word [L27] hx = ix & 0x7fffffff [L29] COND TRUE !((hx) < 0x7f800000L) [L30] return x * x + x; [L92] RET, EXPR __ieee754_sqrtf(x) [L92] float res = __ieee754_sqrtf(x); [L95] CALL, EXPR isnan_float(res) [L13] return x != x; [L95] RET, EXPR isnan_float(res) [L95] COND TRUE !isnan_float(res) [L96] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 105 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 112 SDtfs, 29 SDslu, 83 SDs, 0 SdLazy, 110 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 37 ConstructedInterpolants, 0 QuantifiedInterpolants, 2368 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...