/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 SequenceOfStatements --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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-benchs/inv_sqrt_Quake.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:15:38,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:15:38,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:15:38,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:15:38,741 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:15:38,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:15:38,756 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:15:38,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:15:38,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:15:38,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:15:38,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:15:38,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:15:38,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:15:38,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:15:38,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:15:38,775 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:15:38,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:15:38,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:15:38,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:15:38,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:15:38,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:15:38,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:15:38,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:15:38,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:15:38,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:15:38,789 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:15:38,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:15:38,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:15:38,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:15:38,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:15:38,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:15:38,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:15:38,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:15:38,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:15:38,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:15:38,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:15:38,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:15:38,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:15:38,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:15:38,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:15:38,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:15:38,801 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 [2020-10-13 10:15:38,827 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:15:38,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:15:38,829 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:15:38,829 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:15:38,830 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:15:38,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:15:38,830 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:15:38,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:15:38,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:15:38,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:15:38,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:15:38,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:15:38,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:15:38,832 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:15:38,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:15:38,832 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:15:38,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:15:38,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:15:38,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:15:38,833 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:15:38,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:15:38,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:15:38,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:15:38,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:15:38,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:15:38,834 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:15:38,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:15:38,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:15:38,835 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:15:38,835 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 -> SequenceOfStatements 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:15:39,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:15:39,187 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:15:39,192 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:15:39,194 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:15:39,194 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:15:39,195 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/inv_sqrt_Quake.c.v+cfa-reducer.c [2020-10-13 10:15:39,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eeecd3077/7c0b73a1992c454488d40b44c49a635c/FLAGd08cf85d2 [2020-10-13 10:15:39,890 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:15:39,891 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/inv_sqrt_Quake.c.v+cfa-reducer.c [2020-10-13 10:15:39,901 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eeecd3077/7c0b73a1992c454488d40b44c49a635c/FLAGd08cf85d2 [2020-10-13 10:15:40,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eeecd3077/7c0b73a1992c454488d40b44c49a635c [2020-10-13 10:15:40,267 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:15:40,270 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:15:40,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:15:40,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:15:40,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:15:40,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:15:40" (1/1) ... [2020-10-13 10:15:40,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bb58955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:40, skipping insertion in model container [2020-10-13 10:15:40,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:15:40" (1/1) ... [2020-10-13 10:15:40,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:15:40,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:15:40,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:15:40,597 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:15:40,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:15:40,652 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:15:40,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:40 WrapperNode [2020-10-13 10:15:40,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:15:40,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:15:40,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:15:40,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:15:40,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:40" (1/1) ... [2020-10-13 10:15:40,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:40" (1/1) ... [2020-10-13 10:15:40,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:40" (1/1) ... [2020-10-13 10:15:40,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:40" (1/1) ... [2020-10-13 10:15:40,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:40" (1/1) ... [2020-10-13 10:15:40,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:40" (1/1) ... [2020-10-13 10:15:40,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:40" (1/1) ... [2020-10-13 10:15:40,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:15:40,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:15:40,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:15:40,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:15:40,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:40" (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 [2020-10-13 10:15:40,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:15:40,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:15:40,878 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 10:15:40,878 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:15:40,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:15:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-13 10:15:40,880 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:15:40,881 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 10:15:40,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:15:40,881 INFO L130 BoogieDeclarations]: Found specification of procedure InvSqrt [2020-10-13 10:15:40,881 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:15:40,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 10:15:40,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-13 10:15:40,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:15:40,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:15:40,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-13 10:15:40,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:15:40,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:15:40,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:15:41,182 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:15:41,183 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 10:15:41,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:15:41 BoogieIcfgContainer [2020-10-13 10:15:41,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:15:41,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:15:41,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:15:41,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:15:41,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:15:40" (1/3) ... [2020-10-13 10:15:41,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c464596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:15:41, skipping insertion in model container [2020-10-13 10:15:41,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:40" (2/3) ... [2020-10-13 10:15:41,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c464596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:15:41, skipping insertion in model container [2020-10-13 10:15:41,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:15:41" (3/3) ... [2020-10-13 10:15:41,203 INFO L109 eAbstractionObserver]: Analyzing ICFG inv_sqrt_Quake.c.v+cfa-reducer.c [2020-10-13 10:15:41,220 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:15:41,229 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:15:41,248 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:15:41,302 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:15:41,302 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:15:41,302 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:15:41,303 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:15:41,303 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:15:41,303 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:15:41,303 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:15:41,303 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:15:41,322 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-13 10:15:41,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:15:41,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:41,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:41,331 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:41,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:41,338 INFO L82 PathProgramCache]: Analyzing trace with hash 107488097, now seen corresponding path program 1 times [2020-10-13 10:15:41,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:41,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916714247] [2020-10-13 10:15:41,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:41,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:41,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:41,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:15:41,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:41,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-13 10:15:41,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:41,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:15:41,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:15:41,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:15:41,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-13 10:15:41,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:41,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:41,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:41,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:41,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:41,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 10:15:41,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:41,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:41,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:41,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:41,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:41,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916714247] [2020-10-13 10:15:41,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:15:41,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:15:41,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646318080] [2020-10-13 10:15:41,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:15:41,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:41,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:15:41,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:15:41,976 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-10-13 10:15:42,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:42,159 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-10-13 10:15:42,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:15:42,162 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-13 10:15:42,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:42,174 INFO L225 Difference]: With dead ends: 32 [2020-10-13 10:15:42,175 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:15:42,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:15:42,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:15:42,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-13 10:15:42,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-13 10:15:42,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-13 10:15:42,233 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-13 10:15:42,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:42,234 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-13 10:15:42,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:15:42,234 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-13 10:15:42,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:15:42,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:42,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:42,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:15:42,237 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:42,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:42,237 INFO L82 PathProgramCache]: Analyzing trace with hash 122592134, now seen corresponding path program 1 times [2020-10-13 10:15:42,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:42,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563295066] [2020-10-13 10:15:42,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-13 10:15:42,262 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-13 10:15:42,262 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 10:15:42,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:15:42,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:15:42 BoogieIcfgContainer [2020-10-13 10:15:42,304 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:15:42,309 INFO L168 Benchmark]: Toolchain (without parser) took 2037.18 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 101.2 MB in the beginning and 116.0 MB in the end (delta: -14.8 MB). Peak memory consumption was 41.8 MB. Max. memory is 7.1 GB. [2020-10-13 10:15:42,312 INFO L168 Benchmark]: CDTParser took 0.42 ms. Allocated memory is still 146.3 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-13 10:15:42,314 INFO L168 Benchmark]: CACSL2BoogieTranslator took 381.56 ms. Allocated memory is still 146.3 MB. Free memory was 101.0 MB in the beginning and 90.1 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-10-13 10:15:42,315 INFO L168 Benchmark]: Boogie Preprocessor took 156.05 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 90.1 MB in the beginning and 179.9 MB in the end (delta: -89.9 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-10-13 10:15:42,317 INFO L168 Benchmark]: RCFGBuilder took 379.54 ms. Allocated memory is still 202.9 MB. Free memory was 179.9 MB in the beginning and 163.2 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. [2020-10-13 10:15:42,320 INFO L168 Benchmark]: TraceAbstraction took 1112.79 ms. Allocated memory is still 202.9 MB. Free memory was 162.5 MB in the beginning and 116.0 MB in the end (delta: 46.5 MB). Peak memory consumption was 46.5 MB. Max. memory is 7.1 GB. [2020-10-13 10:15:42,332 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42 ms. Allocated memory is still 146.3 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 381.56 ms. Allocated memory is still 146.3 MB. Free memory was 101.0 MB in the beginning and 90.1 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 156.05 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 90.1 MB in the beginning and 179.9 MB in the end (delta: -89.9 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 379.54 ms. Allocated memory is still 202.9 MB. Free memory was 179.9 MB in the beginning and 163.2 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1112.79 ms. Allocated memory is still 202.9 MB. Free memory was 162.5 MB in the beginning and 116.0 MB in the end (delta: 46.5 MB). Peak memory consumption was 46.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 57]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 44, overapproximation of someBinaryArithmeticDOUBLEoperation at line 35. Possible FailurePath: [L1] int __return_main; [L15] float __return_72; [L16] int __return_87; [L19] float main__a; [L20] float main__r; [L21] main__a = __VERIFIER_nondet_float() [L22] int main____CPAchecker_TMP_0; [L23] COND TRUE main__a >= 0.10000000149011612 [L25] COND TRUE main__a <= 100.0 [L27] main____CPAchecker_TMP_0 = 1 [L28] COND TRUE main____CPAchecker_TMP_0 != 0 [L31] float __tmp_1; [L32] __tmp_1 = main__a [L33] float InvSqrt__x; [L34] InvSqrt__x = __tmp_1 [L35] float InvSqrt__xhalf = 0.5 * InvSqrt__x; [L36] union float_int InvSqrt__i; [L37] InvSqrt__i.f = InvSqrt__x [L38] EXPR InvSqrt__i.i [L38] InvSqrt__i.i = 1597463007 - ((InvSqrt__i.i) >> 1) [L39] EXPR InvSqrt__i.f [L39] InvSqrt__x = InvSqrt__i.f [L40] InvSqrt__x = InvSqrt__x * (1.5 - ((InvSqrt__xhalf * InvSqrt__x) * InvSqrt__x)) [L41] __return_72 = InvSqrt__x [L42] main__r = __return_72 [L43] int main____CPAchecker_TMP_1; [L44] COND FALSE !(main__r >= 0.0) [L70] main____CPAchecker_TMP_1 = 0 [L51] int __tmp_2; [L52] __tmp_2 = main____CPAchecker_TMP_1 [L53] int __VERIFIER_assert__cond; [L54] __VERIFIER_assert__cond = __tmp_2 [L55] COND TRUE __VERIFIER_assert__cond == 0 [L57] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 12 SDslu, 30 SDs, 0 SdLazy, 43 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 455 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...