/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072c.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-19 17:20:26,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:20:26,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:20:26,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 17:20:26,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 17:20:26,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 17:20:26,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 17:20:26,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 17:20:26,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 17:20:26,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 17:20:26,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 17:20:26,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 17:20:26,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 17:20:26,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 17:20:26,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 17:20:26,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 17:20:26,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 17:20:26,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 17:20:26,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 17:20:26,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 17:20:26,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 17:20:26,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 17:20:26,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 17:20:26,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 17:20:26,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 17:20:26,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:20:26,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:20:26,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:20:26,221 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-19 17:20:26,249 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:20:26,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:20:26,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:20:26,251 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:20:26,251 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:20:26,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:20:26,252 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:20:26,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:20:26,252 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:20:26,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:20:26,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:20:26,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:20:26,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:20:26,253 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:20:26,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:20:26,254 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:20:26,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:20:26,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:20:26,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:20:26,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:20:26,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:20:26,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:20:26,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:20:26,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:20:26,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:20:26,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:20:26,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:20:26,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 17:20:26,257 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:20:26,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:20:26,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:20:26,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:20:26,681 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 17:20:26,681 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 17:20:26,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072c.c [2021-02-19 17:20:26,769 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58557dd37/d3119c56f1bd4ea1945d7a12065cca0d/FLAGa1302fb0b [2021-02-19 17:20:27,351 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 17:20:27,352 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1072c.c [2021-02-19 17:20:27,365 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58557dd37/d3119c56f1bd4ea1945d7a12065cca0d/FLAGa1302fb0b [2021-02-19 17:20:27,749 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58557dd37/d3119c56f1bd4ea1945d7a12065cca0d [2021-02-19 17:20:27,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:20:27,764 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:20:27,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 17:20:27,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 17:20:27,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 17:20:27,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:20:27" (1/1) ... [2021-02-19 17:20:27,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ff1db4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:27, skipping insertion in model container [2021-02-19 17:20:27,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:20:27" (1/1) ... [2021-02-19 17:20:27,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 17:20:27,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 17:20:27,968 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_1072c.c[1571,1584] [2021-02-19 17:20:27,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:20:27,984 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 17:20:28,011 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_1072c.c[1571,1584] [2021-02-19 17:20:28,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:20:28,032 INFO L208 MainTranslator]: Completed translation [2021-02-19 17:20:28,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:28 WrapperNode [2021-02-19 17:20:28,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 17:20:28,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:20:28,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:20:28,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:20:28,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:28" (1/1) ... [2021-02-19 17:20:28,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:28" (1/1) ... [2021-02-19 17:20:28,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:28" (1/1) ... [2021-02-19 17:20:28,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:28" (1/1) ... [2021-02-19 17:20:28,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:28" (1/1) ... [2021-02-19 17:20:28,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:28" (1/1) ... [2021-02-19 17:20:28,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:28" (1/1) ... [2021-02-19 17:20:28,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:20:28,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:20:28,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:20:28,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:20:28,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:28" (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 [2021-02-19 17:20:28,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 17:20:28,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:20:28,223 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 17:20:28,223 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2021-02-19 17:20:28,223 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2021-02-19 17:20:28,224 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 17:20:28,224 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 17:20:28,225 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 17:20:28,226 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 17:20:28,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 17:20:28,226 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2021-02-19 17:20:28,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-19 17:20:28,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 17:20:28,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 17:20:28,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 17:20:28,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-19 17:20:28,230 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2021-02-19 17:20:28,231 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 17:20:28,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 17:20:28,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 17:20:28,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:20:28,864 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:20:28,865 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-02-19 17:20:28,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:20:28 BoogieIcfgContainer [2021-02-19 17:20:28,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:20:28,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:20:28,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:20:28,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:20:28,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 05:20:27" (1/3) ... [2021-02-19 17:20:28,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d55a58b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:20:28, skipping insertion in model container [2021-02-19 17:20:28,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:28" (2/3) ... [2021-02-19 17:20:28,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d55a58b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:20:28, skipping insertion in model container [2021-02-19 17:20:28,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:20:28" (3/3) ... [2021-02-19 17:20:28,884 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1072c.c [2021-02-19 17:20:28,896 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:20:28,902 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:20:28,925 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-19 17:20:28,969 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:20:28,969 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:20:28,969 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:20:28,970 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:20:28,970 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:20:28,971 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:20:28,971 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:20:28,971 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:20:29,002 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2021-02-19 17:20:29,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:20:29,010 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:20:29,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:29,012 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:20:29,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:29,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1204990026, now seen corresponding path program 1 times [2021-02-19 17:20:29,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:29,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295682247] [2021-02-19 17:20:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:29,222 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:29,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:29,226 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:29,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:29,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:20:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:29,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:29,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:29,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-19 17:20:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:29,342 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:29,343 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:29,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:29,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:29,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295682247] [2021-02-19 17:20:29,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:20:29,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:20:29,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638147286] [2021-02-19 17:20:29,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:20:29,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:29,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:20:29,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:20:29,375 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2021-02-19 17:20:29,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:29,544 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2021-02-19 17:20:29,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 17:20:29,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-19 17:20:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:29,555 INFO L225 Difference]: With dead ends: 68 [2021-02-19 17:20:29,555 INFO L226 Difference]: Without dead ends: 34 [2021-02-19 17:20:29,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:20:29,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-02-19 17:20:29,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-02-19 17:20:29,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-02-19 17:20:29,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-02-19 17:20:29,630 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 18 [2021-02-19 17:20:29,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:29,631 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-02-19 17:20:29,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:20:29,631 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-02-19 17:20:29,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:20:29,633 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:20:29,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:29,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:20:29,634 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:20:29,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:29,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1585172858, now seen corresponding path program 1 times [2021-02-19 17:20:29,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:29,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712078111] [2021-02-19 17:20:29,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-19 17:20:29,737 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-19 17:20:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-19 17:20:29,807 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-19 17:20:29,837 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-19 17:20:29,837 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-19 17:20:29,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:20:29,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:20:29 BoogieIcfgContainer [2021-02-19 17:20:29,881 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:20:29,885 INFO L168 Benchmark]: Toolchain (without parser) took 2128.39 ms. Allocated memory is still 155.2 MB. Free memory was 130.3 MB in the beginning and 81.9 MB in the end (delta: 48.4 MB). Peak memory consumption was 49.0 MB. Max. memory is 8.0 GB. [2021-02-19 17:20:29,886 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 155.2 MB. Free memory is still 128.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-19 17:20:29,888 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.32 ms. Allocated memory is still 155.2 MB. Free memory was 129.2 MB in the beginning and 119.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-19 17:20:29,891 INFO L168 Benchmark]: Boogie Preprocessor took 50.90 ms. Allocated memory is still 155.2 MB. Free memory was 119.0 MB in the beginning and 117.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-19 17:20:29,893 INFO L168 Benchmark]: RCFGBuilder took 782.13 ms. Allocated memory is still 155.2 MB. Free memory was 117.3 MB in the beginning and 130.6 MB in the end (delta: -13.4 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. [2021-02-19 17:20:29,894 INFO L168 Benchmark]: TraceAbstraction took 1008.42 ms. Allocated memory is still 155.2 MB. Free memory was 130.1 MB in the beginning and 81.9 MB in the end (delta: 48.2 MB). Peak memory consumption was 48.2 MB. Max. memory is 8.0 GB. [2021-02-19 17:20:29,904 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 155.2 MB. Free memory is still 128.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 267.32 ms. Allocated memory is still 155.2 MB. Free memory was 129.2 MB in the beginning and 119.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.90 ms. Allocated memory is still 155.2 MB. Free memory was 119.0 MB in the beginning and 117.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 782.13 ms. Allocated memory is still 155.2 MB. Free memory was 117.3 MB in the beginning and 130.6 MB in the end (delta: -13.4 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1008.42 ms. Allocated memory is still 155.2 MB. Free memory was 130.1 MB in the beginning and 81.9 MB in the end (delta: 48.2 MB). Peak memory consumption was 48.2 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 21, overapproximation of someBinaryArithmeticFLOAToperation at line 40. Possible FailurePath: [L64] float x = 0.0f; VAL [x=0] [L65] CALL, EXPR trunc_float(x) VAL [\old(x)=0] [L15] __int32_t signbit, w, exponent_less_127; VAL [\old(x)=0, x=0] [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 VAL [\old(x)=0, exponent_less_127=255, signbit=-1, w=-2, x=0] [L23] COND FALSE !(exponent_less_127 < 23) VAL [\old(x)=0, exponent_less_127=255, signbit=-1, w=-2, x=0] [L39] COND TRUE exponent_less_127 == 255 [L40] return x + x; VAL [\old(x)=0, exponent_less_127=255, signbit=-1, w=-2, x=0] [L65] RET, EXPR trunc_float(x) VAL [trunc_float(x)=4294967300, x=0] [L65] float res = trunc_float(x); [L68] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [res=4294967300, res == 0.0f && __signbit_float(res) == 0=0, x=0] [L68] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L69] reach_error() VAL [res=4294967300, x=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 38 SDtfs, 6 SDslu, 32 SDs, 0 SdLazy, 39 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 1003 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...