/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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 language data_model -i ../../../trunk/examples/svcomp/float-benchs/inv_sqrt_Quake.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:23:54,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:23:54,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:23:54,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:23:54,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:23:54,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:23:54,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:23:54,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:23:54,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:23:54,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:23:54,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:23:54,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:23:54,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:23:54,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:23:54,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:23:54,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:23:54,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:23:54,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:23:54,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:23:54,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:23:54,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:23:54,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:23:54,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:23:54,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:23:54,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:23:54,644 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:23:54,645 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:23:54,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:23:54,648 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:23:54,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:23:54,649 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:23:54,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:23:54,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:23:54,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:23:54,666 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:23:54,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:23:54,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:23:54,668 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:23:54,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:23:54,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:23:54,670 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:23:54,671 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 [2020-10-28 14:23:54,719 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:23:54,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:23:54,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:23:54,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:23:54,725 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:23:54,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:23:54,725 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:23:54,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:23:54,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:23:54,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:23:54,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:23:54,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:23:54,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:23:54,727 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:23:54,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:23:54,728 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:23:54,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:23:54,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:23:54,728 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:23:54,728 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:23:54,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:23:54,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:23:54,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:23:54,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:23:54,729 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:23:54,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:23:54,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:23:54,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:23:54,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:23:54,730 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:23:55,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:23:55,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:23:55,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:23:55,186 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:23:55,186 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:23:55,187 INFO L432 ainManager$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 [2020-10-28 14:23:55,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22a618ec6/8cdf6f5f6eec4b9b9ac8cb2e9c7cded9/FLAG411c7b92f [2020-10-28 14:23:55,910 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:23:55,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/inv_sqrt_Quake.c.v+cfa-reducer.c [2020-10-28 14:23:55,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22a618ec6/8cdf6f5f6eec4b9b9ac8cb2e9c7cded9/FLAG411c7b92f [2020-10-28 14:23:56,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22a618ec6/8cdf6f5f6eec4b9b9ac8cb2e9c7cded9 [2020-10-28 14:23:56,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:23:56,266 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:23:56,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:23:56,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:23:56,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:23:56,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:23:56" (1/1) ... [2020-10-28 14:23:56,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14a1cb91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:56, skipping insertion in model container [2020-10-28 14:23:56,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:23:56" (1/1) ... [2020-10-28 14:23:56,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:23:56,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:23:56,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:23:56,498 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:23:56,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:23:56,548 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:23:56,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:56 WrapperNode [2020-10-28 14:23:56,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:23:56,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:23:56,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:23:56,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:23:56,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:56" (1/1) ... [2020-10-28 14:23:56,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:56" (1/1) ... [2020-10-28 14:23:56,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:56" (1/1) ... [2020-10-28 14:23:56,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:56" (1/1) ... [2020-10-28 14:23:56,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:56" (1/1) ... [2020-10-28 14:23:56,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:56" (1/1) ... [2020-10-28 14:23:56,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:56" (1/1) ... [2020-10-28 14:23:56,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:23:56,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:23:56,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:23:56,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:23:56,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:56" (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 [2020-10-28 14:23:56,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:23:56,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:23:56,677 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:23:56,677 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 14:23:56,677 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:23:56,677 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:23:56,677 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:23:56,678 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:23:56,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:23:56,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-28 14:23:56,678 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 14:23:56,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:23:56,678 INFO L130 BoogieDeclarations]: Found specification of procedure InvSqrt [2020-10-28 14:23:56,679 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:23:56,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-28 14:23:56,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:23:56,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:23:56,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-28 14:23:56,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:23:56,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:23:56,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:23:56,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:23:57,089 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:23:57,089 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 14:23:57,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:23:57 BoogieIcfgContainer [2020-10-28 14:23:57,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:23:57,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:23:57,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:23:57,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:23:57,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:23:56" (1/3) ... [2020-10-28 14:23:57,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c7945b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:23:57, skipping insertion in model container [2020-10-28 14:23:57,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:56" (2/3) ... [2020-10-28 14:23:57,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c7945b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:23:57, skipping insertion in model container [2020-10-28 14:23:57,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:23:57" (3/3) ... [2020-10-28 14:23:57,101 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_sqrt_Quake.c.v+cfa-reducer.c [2020-10-28 14:23:57,113 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:23:57,118 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:23:57,134 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:23:57,164 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:23:57,164 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:23:57,164 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:23:57,164 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:23:57,165 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:23:57,165 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:23:57,165 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:23:57,165 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:23:57,184 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-28 14:23:57,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 14:23:57,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:23:57,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:23:57,192 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:23:57,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:23:57,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2101451023, now seen corresponding path program 1 times [2020-10-28 14:23:57,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:23:57,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378387541] [2020-10-28 14:23:57,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:23:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:57,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:57,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:57,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:23:57,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:57,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-28 14:23:57,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:57,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:57,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:23:57,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:23:57,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 14:23:57,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:23:57,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:23:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:57,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:57,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:57,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:23:57,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:57,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 14:23:57,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:57,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:57,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:23:57,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:23:57,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:23:57,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:23:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:23:57,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378387541] [2020-10-28 14:23:57,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:23:57,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:23:57,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303579601] [2020-10-28 14:23:57,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:23:57,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:23:57,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:23:57,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:23:57,951 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-10-28 14:23:58,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:23:58,127 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-10-28 14:23:58,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:23:58,129 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-28 14:23:58,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:23:58,139 INFO L225 Difference]: With dead ends: 37 [2020-10-28 14:23:58,140 INFO L226 Difference]: Without dead ends: 17 [2020-10-28 14:23:58,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:23:58,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-28 14:23:58,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-28 14:23:58,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 14:23:58,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-28 14:23:58,190 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-28 14:23:58,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:23:58,191 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-28 14:23:58,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:23:58,191 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-28 14:23:58,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 14:23:58,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:23:58,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:23:58,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:23:58,193 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:23:58,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:23:58,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1725291126, now seen corresponding path program 1 times [2020-10-28 14:23:58,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:23:58,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892586808] [2020-10-28 14:23:58,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:23:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 14:23:58,220 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 14:23:58,220 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 14:23:58,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:23:58,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:23:58 BoogieIcfgContainer [2020-10-28 14:23:58,245 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:23:58,248 INFO L168 Benchmark]: Toolchain (without parser) took 1986.44 ms. Allocated memory is still 157.3 MB. Free memory was 132.5 MB in the beginning and 82.7 MB in the end (delta: 49.9 MB). Peak memory consumption was 51.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:58,249 INFO L168 Benchmark]: CDTParser took 0.67 ms. Allocated memory is still 157.3 MB. Free memory is still 131.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:23:58,250 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.09 ms. Allocated memory is still 157.3 MB. Free memory was 131.9 MB in the beginning and 121.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:58,251 INFO L168 Benchmark]: Boogie Preprocessor took 42.20 ms. Allocated memory is still 157.3 MB. Free memory was 121.5 MB in the beginning and 119.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:58,252 INFO L168 Benchmark]: RCFGBuilder took 498.86 ms. Allocated memory is still 157.3 MB. Free memory was 119.8 MB in the beginning and 139.3 MB in the end (delta: -19.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:58,253 INFO L168 Benchmark]: TraceAbstraction took 1152.00 ms. Allocated memory is still 157.3 MB. Free memory was 138.8 MB in the beginning and 82.7 MB in the end (delta: 56.1 MB). Peak memory consumption was 56.6 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:58,257 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.67 ms. Allocated memory is still 157.3 MB. Free memory is still 131.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 278.09 ms. Allocated memory is still 157.3 MB. Free memory was 131.9 MB in the beginning and 121.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.20 ms. Allocated memory is still 157.3 MB. Free memory was 121.5 MB in the beginning and 119.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 498.86 ms. Allocated memory is still 157.3 MB. Free memory was 119.8 MB in the beginning and 139.3 MB in the end (delta: -19.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1152.00 ms. Allocated memory is still 157.3 MB. Free memory was 138.8 MB in the beginning and 82.7 MB in the end (delta: 56.1 MB). Peak memory consumption was 56.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 4]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 46, overapproximation of someBinaryArithmeticDOUBLEoperation at line 37. Possible FailurePath: [L1] int __return_main; [L17] float __return_72; [L18] int __return_87; [L21] float main__a; [L22] float main__r; [L23] main__a = __VERIFIER_nondet_float() [L24] int main____CPAchecker_TMP_0; [L25] COND TRUE main__a >= 0.10000000149011612 [L27] COND TRUE main__a <= 100.0 [L29] main____CPAchecker_TMP_0 = 1 [L30] COND TRUE main____CPAchecker_TMP_0 != 0 [L33] float __tmp_1; [L34] __tmp_1 = main__a [L35] float InvSqrt__x; [L36] InvSqrt__x = __tmp_1 [L37] float InvSqrt__xhalf = 0.5 * InvSqrt__x; [L38] union float_int InvSqrt__i; [L39] InvSqrt__i.f = InvSqrt__x [L40] EXPR InvSqrt__i.i [L40] InvSqrt__i.i = 1597463007 - ((InvSqrt__i.i) >> 1) [L41] EXPR InvSqrt__i.f [L41] InvSqrt__x = InvSqrt__i.f [L42] InvSqrt__x = InvSqrt__x * (1.5 - ((InvSqrt__xhalf * InvSqrt__x) * InvSqrt__x)) [L43] __return_72 = InvSqrt__x [L44] main__r = __return_72 [L45] int main____CPAchecker_TMP_1; [L46] COND FALSE !(main__r >= 0.0) [L72] main____CPAchecker_TMP_1 = 0 [L53] int __tmp_2; [L54] __tmp_2 = main____CPAchecker_TMP_1 [L55] int __VERIFIER_assert__cond; [L56] __VERIFIER_assert__cond = __tmp_2 [L57] COND TRUE __VERIFIER_assert__cond == 0 [L59] CALL reach_error() [L4] __assert_fail("0", "inv_sqrt_Quake.c.v+cfa-reducer.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 13 SDslu, 30 SDs, 0 SdLazy, 44 SolverSat, 2 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, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 0.5s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 798 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...