/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1010.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 03:55:49,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 03:55:49,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 03:55:49,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-24 03:55:49,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-24 03:55:49,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-24 03:55:49,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-24 03:55:49,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-24 03:55:49,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-24 03:55:49,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-24 03:55:49,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-24 03:55:49,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-24 03:55:49,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 03:55:49,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 03:55:49,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 03:55:49,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 03:55:49,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 03:55:49,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 03:55:49,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 03:55:49,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 03:55:49,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 03:55:49,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 03:55:49,692 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 03:55:49,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 03:55:49,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 03:55:49,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 03:55:49,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 03:55:49,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 03:55:49,731 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 03:55:49,751 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 03:55:49,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 03:55:49,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 03:55:49,756 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 03:55:49,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 03:55:49,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 03:55:49,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 03:55:49,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 03:55:49,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 03:55:49,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 03:55:49,758 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 03:55:49,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 03:55:49,759 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 03:55:49,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 03:55:49,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 03:55:49,760 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 03:55:49,760 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 03:55:49,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 03:55:49,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 03:55:49,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 03:55:49,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 03:55:49,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 03:55:49,761 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 03:55:49,761 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 03:55:50,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 03:55:50,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 03:55:50,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 03:55:50,198 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 03:55:50,201 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 03:55:50,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1010.c [2021-02-24 03:55:50,293 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe7ef61cf/124960df063e400b91ce3ca59bb5cb74/FLAG626533805 [2021-02-24 03:55:51,013 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 03:55:51,014 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1010.c [2021-02-24 03:55:51,022 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe7ef61cf/124960df063e400b91ce3ca59bb5cb74/FLAG626533805 [2021-02-24 03:55:51,377 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe7ef61cf/124960df063e400b91ce3ca59bb5cb74 [2021-02-24 03:55:51,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 03:55:51,399 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 03:55:51,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 03:55:51,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 03:55:51,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 03:55:51,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:55:51" (1/1) ... [2021-02-24 03:55:51,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a01e5ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:51, skipping insertion in model container [2021-02-24 03:55:51,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:55:51" (1/1) ... [2021-02-24 03:55:51,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 03:55:51,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 03:55:51,638 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_1010.c[999,1012] [2021-02-24 03:55:51,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 03:55:51,656 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 03:55:51,684 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_1010.c[999,1012] [2021-02-24 03:55:51,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 03:55:51,710 INFO L208 MainTranslator]: Completed translation [2021-02-24 03:55:51,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:51 WrapperNode [2021-02-24 03:55:51,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 03:55:51,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 03:55:51,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 03:55:51,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 03:55:51,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:51" (1/1) ... [2021-02-24 03:55:51,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:51" (1/1) ... [2021-02-24 03:55:51,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:51" (1/1) ... [2021-02-24 03:55:51,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:51" (1/1) ... [2021-02-24 03:55:51,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:51" (1/1) ... [2021-02-24 03:55:51,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:51" (1/1) ... [2021-02-24 03:55:51,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:51" (1/1) ... [2021-02-24 03:55:51,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 03:55:51,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 03:55:51,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 03:55:51,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 03:55:51,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:51" (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 [2021-02-24 03:55:51,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 03:55:51,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 03:55:51,900 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 03:55:51,900 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2021-02-24 03:55:51,900 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_float [2021-02-24 03:55:51,900 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 03:55:51,901 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 03:55:51,901 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 03:55:51,901 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 03:55:51,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 03:55:51,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-24 03:55:51,901 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2021-02-24 03:55:51,902 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_float [2021-02-24 03:55:51,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-24 03:55:51,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 03:55:51,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 03:55:51,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 03:55:51,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-24 03:55:51,902 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 03:55:51,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 03:55:51,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 03:55:51,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 03:55:52,342 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 03:55:52,342 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-02-24 03:55:52,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:55:52 BoogieIcfgContainer [2021-02-24 03:55:52,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 03:55:52,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 03:55:52,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 03:55:52,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 03:55:52,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:55:51" (1/3) ... [2021-02-24 03:55:52,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@354e6f13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:55:52, skipping insertion in model container [2021-02-24 03:55:52,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:51" (2/3) ... [2021-02-24 03:55:52,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@354e6f13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:55:52, skipping insertion in model container [2021-02-24 03:55:52,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:55:52" (3/3) ... [2021-02-24 03:55:52,354 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1010.c [2021-02-24 03:55:52,361 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 03:55:52,366 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 03:55:52,390 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 03:55:52,416 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 03:55:52,416 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 03:55:52,416 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 03:55:52,417 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 03:55:52,417 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 03:55:52,417 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 03:55:52,417 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 03:55:52,417 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 03:55:52,433 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2021-02-24 03:55:52,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-24 03:55:52,444 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 03:55:52,445 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] [2021-02-24 03:55:52,445 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 03:55:52,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 03:55:52,452 INFO L82 PathProgramCache]: Analyzing trace with hash 79730533, now seen corresponding path program 1 times [2021-02-24 03:55:52,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 03:55:52,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772707398] [2021-02-24 03:55:52,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 03:55:52,541 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 03:55:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:55:52,669 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:55:52,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:55:52,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:55:52,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:55:52,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 03:55:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:55:52,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:55:52,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:55:52,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 03:55:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:55:52,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:55:52,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:55:52,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:55:52,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:55:52,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-02-24 03:55:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:55:52,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:55:52,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:55:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 03:55:52,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772707398] [2021-02-24 03:55:52,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 03:55:52,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 03:55:52,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927525989] [2021-02-24 03:55:52,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 03:55:52,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 03:55:52,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 03:55:52,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 03:55:52,905 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 4 states. [2021-02-24 03:55:53,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 03:55:53,184 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2021-02-24 03:55:53,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 03:55:53,186 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2021-02-24 03:55:53,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 03:55:53,196 INFO L225 Difference]: With dead ends: 91 [2021-02-24 03:55:53,196 INFO L226 Difference]: Without dead ends: 47 [2021-02-24 03:55:53,200 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 [2021-02-24 03:55:53,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-24 03:55:53,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-02-24 03:55:53,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-24 03:55:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 46 transitions. [2021-02-24 03:55:53,257 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 46 transitions. Word has length 32 [2021-02-24 03:55:53,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 03:55:53,258 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 46 transitions. [2021-02-24 03:55:53,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 03:55:53,258 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 46 transitions. [2021-02-24 03:55:53,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-24 03:55:53,260 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 03:55:53,260 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] [2021-02-24 03:55:53,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 03:55:53,261 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 03:55:53,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 03:55:53,262 INFO L82 PathProgramCache]: Analyzing trace with hash -890393662, now seen corresponding path program 1 times [2021-02-24 03:55:53,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 03:55:53,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530020958] [2021-02-24 03:55:53,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 03:55:53,266 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 03:55:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 03:55:53,352 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 03:55:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 03:55:53,434 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 03:55:53,479 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 03:55:53,479 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 03:55:53,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 03:55:53,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 03:55:53 BoogieIcfgContainer [2021-02-24 03:55:53,499 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 03:55:53,501 INFO L168 Benchmark]: Toolchain (without parser) took 2114.51 ms. Allocated memory is still 151.0 MB. Free memory was 128.0 MB in the beginning and 100.6 MB in the end (delta: 27.5 MB). Peak memory consumption was 28.9 MB. Max. memory is 8.0 GB. [2021-02-24 03:55:53,502 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 125.2 MB in the end (delta: 436.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 03:55:53,503 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.30 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 03:55:53,504 INFO L168 Benchmark]: Boogie Preprocessor took 75.60 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 03:55:53,505 INFO L168 Benchmark]: RCFGBuilder took 554.67 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 98.3 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-02-24 03:55:53,506 INFO L168 Benchmark]: TraceAbstraction took 1152.72 ms. Allocated memory is still 151.0 MB. Free memory was 97.7 MB in the beginning and 100.6 MB in the end (delta: -2.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 03:55:53,509 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 125.2 MB in the end (delta: 436.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 307.30 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 75.60 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 554.67 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 98.3 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1152.72 ms. Allocated memory is still 151.0 MB. Free memory was 97.7 MB in the beginning and 100.6 MB in the end (delta: -2.9 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 42]: 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 14, overapproximation of someBinaryArithmeticFLOAToperation at line 37, overapproximation of bitwiseAnd at line 25. Possible FailurePath: [L37] float x = 0.0f / 0.0f; [L38] CALL, EXPR fabs_float(x) [L17] __uint32_t ix; [L19] ieee_float_shape_type gf_u; [L20] gf_u.value = (x) [L21] EXPR gf_u.word [L21] (ix) = gf_u.word [L24] ieee_float_shape_type sf_u; [L25] sf_u.word = (ix & 0x7fffffff) [L26] EXPR sf_u.value [L26] (x) = sf_u.value [L28] return x; [L38] RET, EXPR fabs_float(x) [L38] float res = fabs_float(x); [L41] CALL, EXPR isnan_float(res) [L14] return x != x; [L41] RET, EXPR isnan_float(res) [L41] COND TRUE !isnan_float(res) [L42] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 50 SDtfs, 13 SDslu, 28 SDs, 0 SdLazy, 57 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=54occurred 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: No data available, 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...