/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=0.2 --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-benchs/sqrt_poly2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 04:15:51,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 04:15:51,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 04:15:51,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 04:15:51,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 04:15:51,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 04:15:51,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 04:15:51,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 04:15:51,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 04:15:51,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 04:15:51,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 04:15:51,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 04:15:51,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 04:15:51,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 04:15:51,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 04:15:51,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 04:15:51,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 04:15:51,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 04:15:51,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 04:15:51,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 04:15:51,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 04:15:51,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 04:15:51,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 04:15:51,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 04:15:51,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 04:15:51,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 04:15:51,068 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 04:15:51,069 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 04:15:51,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 04:15:51,070 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 04:15:51,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 04:15:51,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 04:15:51,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 04:15:51,075 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 04:15:51,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 04:15:51,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 04:15:51,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 04:15:51,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 04:15:51,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 04:15:51,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 04:15:51,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 04:15:51,090 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 04:15:51,143 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 04:15:51,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 04:15:51,145 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 04:15:51,145 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 04:15:51,146 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 04:15:51,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 04:15:51,147 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 04:15:51,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 04:15:51,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 04:15:51,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 04:15:51,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 04:15:51,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 04:15:51,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 04:15:51,149 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 04:15:51,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 04:15:51,151 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 04:15:51,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 04:15:51,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 04:15:51,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 04:15:51,151 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 04:15:51,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 04:15:51,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 04:15:51,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 04:15:51,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 04:15:51,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 04:15:51,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 04:15:51,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 04:15:51,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 04:15:51,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 04:15:51,153 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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-09-25 04:15:51,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 04:15:51,675 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 04:15:51,680 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 04:15:51,681 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 04:15:51,682 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 04:15:51,683 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2020-09-25 04:15:51,774 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b5481a83/3b82ec20d8c743798e687d1926e58a36/FLAG80dcada84 [2020-09-25 04:15:52,344 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 04:15:52,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2020-09-25 04:15:52,355 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b5481a83/3b82ec20d8c743798e687d1926e58a36/FLAG80dcada84 [2020-09-25 04:15:52,658 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b5481a83/3b82ec20d8c743798e687d1926e58a36 [2020-09-25 04:15:52,671 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 04:15:52,676 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 04:15:52,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 04:15:52,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 04:15:52,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 04:15:52,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:15:52" (1/1) ... [2020-09-25 04:15:52,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@434f45a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:15:52, skipping insertion in model container [2020-09-25 04:15:52,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:15:52" (1/1) ... [2020-09-25 04:15:52,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 04:15:52,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 04:15:52,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:15:52,979 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 04:15:53,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:15:53,036 INFO L208 MainTranslator]: Completed translation [2020-09-25 04:15:53,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:15:53 WrapperNode [2020-09-25 04:15:53,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 04:15:53,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 04:15:53,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 04:15:53,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 04:15:53,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:15:53" (1/1) ... [2020-09-25 04:15:53,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:15:53" (1/1) ... [2020-09-25 04:15:53,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:15:53" (1/1) ... [2020-09-25 04:15:53,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:15:53" (1/1) ... [2020-09-25 04:15:53,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:15:53" (1/1) ... [2020-09-25 04:15:53,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:15:53" (1/1) ... [2020-09-25 04:15:53,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:15:53" (1/1) ... [2020-09-25 04:15:53,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 04:15:53,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 04:15:53,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 04:15:53,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 04:15:53,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:15:53" (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 04:15:53,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 04:15:53,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 04:15:53,256 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 04:15:53,256 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 04:15:53,257 INFO L138 BoogieDeclarations]: Found implementation of procedure sqrt_custom [2020-09-25 04:15:53,258 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 04:15:53,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 04:15:53,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-09-25 04:15:53,259 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 04:15:53,259 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 04:15:53,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 04:15:53,260 INFO L130 BoogieDeclarations]: Found specification of procedure sqrt_custom [2020-09-25 04:15:53,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 04:15:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-25 04:15:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 04:15:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 04:15:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-25 04:15:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 04:15:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 04:15:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 04:15:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 04:15:53,670 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 04:15:53,670 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 04:15:53,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:15:53 BoogieIcfgContainer [2020-09-25 04:15:53,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 04:15:53,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 04:15:53,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 04:15:53,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 04:15:53,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 04:15:52" (1/3) ... [2020-09-25 04:15:53,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cfdb3d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:15:53, skipping insertion in model container [2020-09-25 04:15:53,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:15:53" (2/3) ... [2020-09-25 04:15:53,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cfdb3d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:15:53, skipping insertion in model container [2020-09-25 04:15:53,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:15:53" (3/3) ... [2020-09-25 04:15:53,686 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-09-25 04:15:53,699 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 04:15:53,711 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 04:15:53,735 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 04:15:53,767 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 04:15:53,768 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 04:15:53,768 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 04:15:53,768 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 04:15:53,768 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 04:15:53,768 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 04:15:53,768 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 04:15:53,769 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 04:15:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states. [2020-09-25 04:15:53,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-25 04:15:53,801 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:15:53,802 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:15:53,803 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:15:53,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:15:53,810 INFO L82 PathProgramCache]: Analyzing trace with hash 284093711, now seen corresponding path program 1 times [2020-09-25 04:15:53,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:15:53,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759436948] [2020-09-25 04:15:53,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:15:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 04:15:54,088 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 04:15:54,089 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 04:15:54,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 04:15:54,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 04:15:54 BoogieIcfgContainer [2020-09-25 04:15:54,119 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 04:15:54,123 INFO L168 Benchmark]: Toolchain (without parser) took 1449.38 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 101.9 MB in the beginning and 138.8 MB in the end (delta: -36.9 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. [2020-09-25 04:15:54,124 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 04:15:54,125 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.55 ms. Allocated memory is still 138.4 MB. Free memory was 101.2 MB in the beginning and 89.6 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-09-25 04:15:54,127 INFO L168 Benchmark]: Boogie Preprocessor took 138.11 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 89.6 MB in the beginning and 177.4 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-09-25 04:15:54,128 INFO L168 Benchmark]: RCFGBuilder took 500.33 ms. Allocated memory is still 200.3 MB. Free memory was 177.4 MB in the beginning and 155.9 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. [2020-09-25 04:15:54,129 INFO L168 Benchmark]: TraceAbstraction took 441.64 ms. Allocated memory is still 200.3 MB. Free memory was 155.2 MB in the beginning and 138.8 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. [2020-09-25 04:15:54,133 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 358.55 ms. Allocated memory is still 138.4 MB. Free memory was 101.2 MB in the beginning and 89.6 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.11 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 89.6 MB in the beginning and 177.4 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 500.33 ms. Allocated memory is still 200.3 MB. Free memory was 177.4 MB in the beginning and 155.9 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 441.64 ms. Allocated memory is still 200.3 MB. Free memory was 155.2 MB in the beginning and 138.8 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 36, overapproximation of someUnaryDOUBLEoperation at line 20, overapproximation of bitwiseAnd at line 35, overapproximation of someBinaryArithmeticDOUBLEoperation at line 49, overapproximation of someBinaryDOUBLEComparisonOperation at line 63. Possible FailurePath: [L15] double C0 = 1.414213538; [L16] double C1 = 0.229761391; [L17] double C2 = 1.296735525; [L18] double C3 = -0.901098370; [L19] double C4 = 0.493553400; [L20] double C5 = -0.118958666; [L56] double x,y; [L58] x = __VERIFIER_nondet_double() [L59] CALL assume_abort_if_not(x >= 1. && x <= 1e10) [L10] COND FALSE !(!cond) [L59] RET assume_abort_if_not(x >= 1. && x <= 1e10) [L61] CALL, EXPR sqrt_custom(x) [L29] union u x; [L30] double r; [L31] int exp; [L33] x.d = a [L35] EXPR x.i[0] [L35] exp = (x.i[0] & 0x7FF00000) >> 20 [L36] EXPR x.i[0] [L36] x.i[0] = (x.i[0] & 0x800FFFFF) | 0x3FF00000 [L37] EXPR x.d [L37] r = x.d * 0.5 [L39] r = C1+C2+(C3+(C4+C5*r)*r)*r [L41] COND FALSE !(exp % 2 == 0) [L45] r = r * C0 [L48] x.i[0] = (exp/2 + 511) << 20 [L49] EXPR x.d [L49] r = r * x.d [L51] return r; [L51] return r; [L61] RET, EXPR sqrt_custom(x) [L61] y = sqrt_custom(x) [L63] CALL __VERIFIER_assert(y >= 0. && y <= 1e6) [L12] COND TRUE !(cond) [L12] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 75 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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...