/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:10:43,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:10:43,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:10:44,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 20:10:44,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 20:10:44,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 20:10:44,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 20:10:44,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 20:10:44,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 20:10:44,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 20:10:44,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 20:10:44,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 20:10:44,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:10:44,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:10:44,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:10:44,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:10:44,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:10:44,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:10:44,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:10:44,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:10:44,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:10:44,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:10:44,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:10:44,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:10:44,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-21 20:10:44,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-21 20:10:44,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-21 20:10:44,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-21 20:10:44,105 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-21 20:10:44,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-21 20:10:44,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-21 20:10:44,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-21 20:10:44,111 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-21 20:10:44,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-21 20:10:44,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-21 20:10:44,114 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-21 20:10:44,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-21 20:10:44,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-21 20:10:44,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:10:44,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:10:44,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:10:44,118 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:10:44,141 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:10:44,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:10:44,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:10:44,146 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:10:44,146 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:10:44,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:10:44,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:10:44,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:10:44,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:10:44,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:10:44,149 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:10:44,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:10:44,149 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:10:44,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:10:44,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:10:44,150 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:10:44,150 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:10:44,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:10:44,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:10:44,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:10:44,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:10:44,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:10:44,152 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:10:44,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:10:44,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:10:44,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:10:44,560 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:10:44,561 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:10:44,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c [2021-02-21 20:10:44,639 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d652b113/8c5cd1a972cf4a97938363c57c81f017/FLAG228a3fef3 [2021-02-21 20:10:45,176 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:10:45,177 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c [2021-02-21 20:10:45,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d652b113/8c5cd1a972cf4a97938363c57c81f017/FLAG228a3fef3 [2021-02-21 20:10:45,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d652b113/8c5cd1a972cf4a97938363c57c81f017 [2021-02-21 20:10:45,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:10:45,606 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:10:45,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:10:45,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:10:45,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:10:45,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:10:45" (1/1) ... [2021-02-21 20:10:45,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@602484f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:45, skipping insertion in model container [2021-02-21 20:10:45,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:10:45" (1/1) ... [2021-02-21 20:10:45,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:10:45,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:10:45,912 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_1072d.c[1573,1586] [2021-02-21 20:10:45,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:10:45,930 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:10:45,979 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_1072d.c[1573,1586] [2021-02-21 20:10:45,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:10:46,006 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:10:46,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:46 WrapperNode [2021-02-21 20:10:46,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:10:46,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:10:46,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:10:46,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:10:46,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:46" (1/1) ... [2021-02-21 20:10:46,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:46" (1/1) ... [2021-02-21 20:10:46,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:46" (1/1) ... [2021-02-21 20:10:46,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:46" (1/1) ... [2021-02-21 20:10:46,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:46" (1/1) ... [2021-02-21 20:10:46,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:46" (1/1) ... [2021-02-21 20:10:46,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:46" (1/1) ... [2021-02-21 20:10:46,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:10:46,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:10:46,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:10:46,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:10:46,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:46" (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 [2021-02-21 20:10:46,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:10:46,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:10:46,203 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:10:46,204 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2021-02-21 20:10:46,204 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2021-02-21 20:10:46,204 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:10:46,204 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:10:46,204 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:10:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:10:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:10:46,206 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2021-02-21 20:10:46,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-21 20:10:46,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:10:46,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:10:46,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:10:46,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-21 20:10:46,208 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2021-02-21 20:10:46,208 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:10:46,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:10:46,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:10:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:10:46,796 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:10:46,797 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-02-21 20:10:46,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:10:46 BoogieIcfgContainer [2021-02-21 20:10:46,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:10:46,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:10:46,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:10:46,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:10:46,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:10:45" (1/3) ... [2021-02-21 20:10:46,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cccb811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:10:46, skipping insertion in model container [2021-02-21 20:10:46,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:46" (2/3) ... [2021-02-21 20:10:46,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cccb811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:10:46, skipping insertion in model container [2021-02-21 20:10:46,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:10:46" (3/3) ... [2021-02-21 20:10:46,809 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1072d.c [2021-02-21 20:10:46,817 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:10:46,823 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:10:46,844 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:10:46,871 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:10:46,871 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:10:46,872 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:10:46,872 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:10:46,872 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:10:46,872 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:10:46,873 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:10:46,873 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:10:46,891 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2021-02-21 20:10:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-21 20:10:46,902 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:10:46,903 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] [2021-02-21 20:10:46,903 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:10:46,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:10:46,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1967112083, now seen corresponding path program 1 times [2021-02-21 20:10:46,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:10:46,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515210444] [2021-02-21 20:10:46,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:10:47,001 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:10:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:47,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:47,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:47,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:47,139 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:47,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:10:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:47,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:47,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:47,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:10:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:47,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:47,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:47,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:47,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:10:47,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515210444] [2021-02-21 20:10:47,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:10:47,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:10:47,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058517667] [2021-02-21 20:10:47,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:10:47,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:10:47,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:10:47,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:10:47,311 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 4 states. [2021-02-21 20:10:47,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:10:47,679 INFO L93 Difference]: Finished difference Result 149 states and 174 transitions. [2021-02-21 20:10:47,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:10:47,681 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2021-02-21 20:10:47,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:10:47,690 INFO L225 Difference]: With dead ends: 149 [2021-02-21 20:10:47,691 INFO L226 Difference]: Without dead ends: 76 [2021-02-21 20:10:47,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:10:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-21 20:10:47,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-02-21 20:10:47,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-02-21 20:10:47,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2021-02-21 20:10:47,750 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 34 [2021-02-21 20:10:47,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:10:47,751 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2021-02-21 20:10:47,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:10:47,751 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2021-02-21 20:10:47,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-21 20:10:47,753 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:10:47,753 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] [2021-02-21 20:10:47,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:10:47,754 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:10:47,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:10:47,755 INFO L82 PathProgramCache]: Analyzing trace with hash 712119979, now seen corresponding path program 1 times [2021-02-21 20:10:47,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:10:47,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299770212] [2021-02-21 20:10:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:10:47,760 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:10:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:10:47,826 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:10:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:10:47,886 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:10:47,950 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:10:47,951 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:10:47,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:10:47,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:10:47 BoogieIcfgContainer [2021-02-21 20:10:47,979 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:10:47,982 INFO L168 Benchmark]: Toolchain (without parser) took 2388.03 ms. Allocated memory is still 151.0 MB. Free memory was 127.5 MB in the beginning and 60.8 MB in the end (delta: 66.7 MB). Peak memory consumption was 66.7 MB. Max. memory is 8.0 GB. [2021-02-21 20:10:47,985 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 125.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:10:47,986 INFO L168 Benchmark]: CACSL2BoogieTranslator took 394.18 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 116.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 20:10:47,989 INFO L168 Benchmark]: Boogie Preprocessor took 84.03 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:10:47,990 INFO L168 Benchmark]: RCFGBuilder took 706.06 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 124.2 MB in the end (delta: -9.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-21 20:10:47,991 INFO L168 Benchmark]: TraceAbstraction took 1178.73 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 60.8 MB in the end (delta: 62.9 MB). Peak memory consumption was 62.9 MB. Max. memory is 8.0 GB. [2021-02-21 20:10:48,002 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 151.0 MB. Free memory is still 125.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 394.18 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 116.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 84.03 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 706.06 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 124.2 MB in the end (delta: -9.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1178.73 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 60.8 MB in the end (delta: 62.9 MB). Peak memory consumption was 62.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 69]: 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 68, overapproximation of bitwiseAnd at line 22, overapproximation of someUnaryFLOAToperation at line 64, overapproximation of someBinaryArithmeticFLOAToperation at line 40. Possible FailurePath: [L64] float x = -0.0f; [L65] CALL, EXPR trunc_float(x) [L15] __int32_t signbit, w, exponent_less_127; [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (w) = gf_u.word [L21] signbit = w & 0x80000000 [L22] exponent_less_127 = ((w & 0x7f800000) >> 23) - 127 [L23] COND FALSE !(exponent_less_127 < 23) [L39] COND TRUE exponent_less_127 == 255 [L40] return x + x; [L65] RET, EXPR trunc_float(x) [L65] float res = trunc_float(x); [L68] EXPR res == -0.0f && __signbit_float(res) == 1 [L68] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L69] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 87 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: 83 SDtfs, 15 SDslu, 55 SDs, 0 SdLazy, 97 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred 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...