/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_0720.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 22:35:13,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 22:35:13,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 22:35:13,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 22:35:13,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 22:35:13,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 22:35:13,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 22:35:13,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 22:35:13,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 22:35:13,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 22:35:13,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 22:35:13,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 22:35:13,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 22:35:13,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 22:35:13,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 22:35:13,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 22:35:13,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 22:35:13,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 22:35:13,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 22:35:13,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 22:35:13,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 22:35:13,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 22:35:13,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 22:35:13,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 22:35:13,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 22:35:13,767 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 22:35:13,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 22:35:13,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 22:35:13,771 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 22:35:13,773 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 22:35:13,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 22:35:13,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 22:35:13,777 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 22:35:13,778 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 22:35:13,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 22:35:13,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 22:35:13,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 22:35:13,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 22:35:13,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 22:35:13,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 22:35:13,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 22:35:13,789 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 22:35:13,809 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 22:35:13,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 22:35:13,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 22:35:13,812 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 22:35:13,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 22:35:13,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 22:35:13,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 22:35:13,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 22:35:13,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 22:35:13,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 22:35:13,813 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 22:35:13,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 22:35:13,813 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 22:35:13,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 22:35:13,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 22:35:13,817 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 22:35:13,817 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 22:35:13,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 22:35:13,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:35:13,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 22:35:13,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 22:35:13,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 22:35:13,818 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 22:35:14,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 22:35:14,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 22:35:14,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 22:35:14,232 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 22:35:14,233 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 22:35:14,234 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0720.c [2021-02-23 22:35:14,319 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09aec219a/de4353057b844ebfbce5eba8d2e5c39d/FLAG2b452853c [2021-02-23 22:35:14,863 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 22:35:14,867 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_0720.c [2021-02-23 22:35:14,875 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09aec219a/de4353057b844ebfbce5eba8d2e5c39d/FLAG2b452853c [2021-02-23 22:35:15,195 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09aec219a/de4353057b844ebfbce5eba8d2e5c39d [2021-02-23 22:35:15,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 22:35:15,223 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 22:35:15,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 22:35:15,226 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 22:35:15,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 22:35:15,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:35:15" (1/1) ... [2021-02-23 22:35:15,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@201e2a5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:15, skipping insertion in model container [2021-02-23 22:35:15,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:35:15" (1/1) ... [2021-02-23 22:35:15,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 22:35:15,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 22:35:15,557 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_0720.c[1929,1942] [2021-02-23 22:35:15,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:35:15,570 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 22:35:15,598 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_0720.c[1929,1942] [2021-02-23 22:35:15,599 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:35:15,615 INFO L208 MainTranslator]: Completed translation [2021-02-23 22:35:15,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:15 WrapperNode [2021-02-23 22:35:15,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 22:35:15,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 22:35:15,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 22:35:15,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 22:35:15,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:15" (1/1) ... [2021-02-23 22:35:15,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:15" (1/1) ... [2021-02-23 22:35:15,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:15" (1/1) ... [2021-02-23 22:35:15,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:15" (1/1) ... [2021-02-23 22:35:15,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:15" (1/1) ... [2021-02-23 22:35:15,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:15" (1/1) ... [2021-02-23 22:35:15,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:15" (1/1) ... [2021-02-23 22:35:15,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 22:35:15,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 22:35:15,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 22:35:15,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 22:35:15,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2021-02-23 22:35:15,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 22:35:15,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 22:35:15,762 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 22:35:15,762 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2021-02-23 22:35:15,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2021-02-23 22:35:15,763 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 22:35:15,763 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 22:35:15,763 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 22:35:15,764 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 22:35:15,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 22:35:15,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-23 22:35:15,765 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2021-02-23 22:35:15,765 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2021-02-23 22:35:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-23 22:35:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 22:35:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 22:35:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 22:35:15,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-23 22:35:15,767 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 22:35:15,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 22:35:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 22:35:15,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 22:35:16,235 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 22:35:16,236 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-23 22:35:16,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:35:16 BoogieIcfgContainer [2021-02-23 22:35:16,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 22:35:16,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 22:35:16,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 22:35:16,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 22:35:16,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:35:15" (1/3) ... [2021-02-23 22:35:16,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e60d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:35:16, skipping insertion in model container [2021-02-23 22:35:16,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:15" (2/3) ... [2021-02-23 22:35:16,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e60d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:35:16, skipping insertion in model container [2021-02-23 22:35:16,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:35:16" (3/3) ... [2021-02-23 22:35:16,247 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_0720.c [2021-02-23 22:35:16,255 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 22:35:16,260 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 22:35:16,280 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 22:35:16,306 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 22:35:16,306 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 22:35:16,307 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 22:35:16,307 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 22:35:16,307 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 22:35:16,307 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 22:35:16,307 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 22:35:16,307 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 22:35:16,327 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states. [2021-02-23 22:35:16,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-23 22:35:16,339 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:35:16,340 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] [2021-02-23 22:35:16,341 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:35:16,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:35:16,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1576615721, now seen corresponding path program 1 times [2021-02-23 22:35:16,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:35:16,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261192634] [2021-02-23 22:35:16,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:35:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:35:16,551 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:16,552 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:16,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:16,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:16,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:35:16,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:35:16,634 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:16,635 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:16,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 22:35:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:35:16,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:16,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:16,685 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:16,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:16,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-02-23 22:35:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:35:16,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:16,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 22:35:16,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261192634] [2021-02-23 22:35:16,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:35:16,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 22:35:16,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679302536] [2021-02-23 22:35:16,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 22:35:16,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:35:16,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 22:35:16,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 22:35:16,746 INFO L87 Difference]: Start difference. First operand 106 states. Second operand 4 states. [2021-02-23 22:35:17,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:35:17,115 INFO L93 Difference]: Finished difference Result 185 states and 219 transitions. [2021-02-23 22:35:17,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 22:35:17,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2021-02-23 22:35:17,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:35:17,130 INFO L225 Difference]: With dead ends: 185 [2021-02-23 22:35:17,130 INFO L226 Difference]: Without dead ends: 99 [2021-02-23 22:35:17,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 22:35:17,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-02-23 22:35:17,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-02-23 22:35:17,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-02-23 22:35:17,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-02-23 22:35:17,196 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 43 [2021-02-23 22:35:17,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:35:17,197 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-02-23 22:35:17,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 22:35:17,197 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-02-23 22:35:17,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-23 22:35:17,200 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:35:17,200 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] [2021-02-23 22:35:17,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 22:35:17,201 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:35:17,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:35:17,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1265194154, now seen corresponding path program 1 times [2021-02-23 22:35:17,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:35:17,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662994233] [2021-02-23 22:35:17,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:35:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:35:17,259 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:35:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:35:17,296 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:35:17,357 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 22:35:17,357 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 22:35:17,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 22:35:17,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:35:17 BoogieIcfgContainer [2021-02-23 22:35:17,445 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 22:35:17,447 INFO L168 Benchmark]: Toolchain (without parser) took 2237.06 ms. Allocated memory was 169.9 MB in the beginning and 209.7 MB in the end (delta: 39.8 MB). Free memory was 145.5 MB in the beginning and 165.0 MB in the end (delta: -19.5 MB). Peak memory consumption was 21.2 MB. Max. memory is 8.0 GB. [2021-02-23 22:35:17,448 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 169.9 MB. Free memory is still 142.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 22:35:17,448 INFO L168 Benchmark]: CACSL2BoogieTranslator took 390.05 ms. Allocated memory is still 169.9 MB. Free memory was 144.4 MB in the beginning and 133.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-02-23 22:35:17,449 INFO L168 Benchmark]: Boogie Preprocessor took 43.29 ms. Allocated memory is still 169.9 MB. Free memory was 133.5 MB in the beginning and 131.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 22:35:17,450 INFO L168 Benchmark]: RCFGBuilder took 577.47 ms. Allocated memory is still 169.9 MB. Free memory was 131.7 MB in the beginning and 140.5 MB in the end (delta: -8.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-02-23 22:35:17,451 INFO L168 Benchmark]: TraceAbstraction took 1204.58 ms. Allocated memory was 169.9 MB in the beginning and 209.7 MB in the end (delta: 39.8 MB). Free memory was 140.0 MB in the beginning and 165.0 MB in the end (delta: -25.0 MB). Peak memory consumption was 14.9 MB. Max. memory is 8.0 GB. [2021-02-23 22:35:17,455 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 169.9 MB. Free memory is still 142.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 390.05 ms. Allocated memory is still 169.9 MB. Free memory was 144.4 MB in the beginning and 133.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.29 ms. Allocated memory is still 169.9 MB. Free memory was 133.5 MB in the beginning and 131.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 577.47 ms. Allocated memory is still 169.9 MB. Free memory was 131.7 MB in the beginning and 140.5 MB in the end (delta: -8.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1204.58 ms. Allocated memory was 169.9 MB in the beginning and 209.7 MB in the end (delta: 39.8 MB). Free memory was 140.0 MB in the beginning and 165.0 MB in the end (delta: -25.0 MB). Peak memory consumption was 14.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 98]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 15, overapproximation of someBinaryArithmeticFLOAToperation at line 32, overapproximation of bitwiseAnd at line 29. Possible FailurePath: [L17] static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30; VAL [\old(one_sqrt)=4294967300, \old(tiny_sqrt)=4294967299, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L93] float x = 0.0f / 0.0f; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L94] CALL, EXPR __ieee754_sqrtf(x) VAL [\old(x)=4294967307, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L20] float z; VAL [\old(x)=4294967307, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967307] [L21] __uint32_t r, hx; VAL [\old(x)=4294967307, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967307] [L22] __int32_t ix, s, q, m, t, i; VAL [\old(x)=4294967307, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967307] [L25] ieee_float_shape_type gf_u; VAL [\old(x)=4294967307, gf_u={3:0}, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967307] [L26] gf_u.value = (x) VAL [\old(x)=4294967307, gf_u={3:0}, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967307] [L27] EXPR gf_u.word VAL [\old(x)=4294967307, gf_u={3:0}, gf_u.word=4294967295, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967307] [L27] (ix) = gf_u.word VAL [\old(x)=4294967307, gf_u={3:0}, gf_u.word=4294967295, ix=-1, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967307] [L29] hx = ix & 0x7fffffff VAL [\old(x)=4294967307, ix=-1, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967307] [L31] COND TRUE !((hx) < 0x7f800000L) VAL [\old(x)=4294967307, hx=2139095040, ix=-1, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967307] [L32] return x * x + x; VAL [\old(x)=4294967307, hx=2139095040, ix=-1, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967307] [L94] RET, EXPR __ieee754_sqrtf(x) VAL [__ieee754_sqrtf(x)=4294967302, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967307] [L94] float res = __ieee754_sqrtf(x); VAL [__ieee754_sqrtf(x)=4294967302, one_sqrt=1, res=4294967302, tiny_sqrt=1/1000000000000000000000000000000, x=4294967307] [L97] CALL, EXPR isnan_float(res) VAL [\old(x)=4294967302, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L15] return x != x; VAL [\old(x)=4294967302, \result=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967302] [L97] RET, EXPR isnan_float(res) VAL [isnan_float(res)=0, one_sqrt=1, res=4294967302, tiny_sqrt=1/1000000000000000000000000000000, x=4294967307] [L97] COND TRUE !isnan_float(res) VAL [isnan_float(res)=0, one_sqrt=1, res=4294967302, tiny_sqrt=1/1000000000000000000000000000000, x=4294967307] [L98] reach_error() VAL [one_sqrt=1, res=4294967302, tiny_sqrt=1/1000000000000000000000000000000, x=4294967307] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 109 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 113 SDtfs, 29 SDslu, 81 SDs, 0 SdLazy, 114 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=106occurred 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, 0.2s InterpolantComputationTime, 93 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 3780 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...