/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1011a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 22:35:27,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 22:35:27,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 22:35:27,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 22:35:27,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 22:35:27,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 22:35:27,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 22:35:27,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 22:35:27,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 22:35:27,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 22:35:27,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 22:35:27,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 22:35:27,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 22:35:27,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 22:35:27,504 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 22:35:27,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 22:35:27,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 22:35:27,532 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 22:35:27,543 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 22:35:27,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 22:35:27,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 22:35:27,546 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 22:35:27,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 22:35:27,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 22:35:27,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 22:35:27,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 22:35:27,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 22:35:27,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 22:35:27,547 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 22:35:27,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 22:35:27,547 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 22:35:27,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 22:35:27,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 22:35:27,548 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 22:35:27,548 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 22:35:27,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 22:35:27,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:35:27,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 22:35:27,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 22:35:27,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 22:35:27,550 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 22:35:27,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 22:35:27,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 22:35:27,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 22:35:27,956 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 22:35:27,957 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 22:35:27,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1011a.c [2021-02-23 22:35:28,030 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8652eeaaa/183157228c904bbd8e97ee22598e6e58/FLAGa86abde84 [2021-02-23 22:35:28,644 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 22:35:28,644 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1011a.c [2021-02-23 22:35:28,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8652eeaaa/183157228c904bbd8e97ee22598e6e58/FLAGa86abde84 [2021-02-23 22:35:29,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8652eeaaa/183157228c904bbd8e97ee22598e6e58 [2021-02-23 22:35:29,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 22:35:29,035 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 22:35:29,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 22:35:29,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 22:35:29,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 22:35:29,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:35:29" (1/1) ... [2021-02-23 22:35:29,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b87d29d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:29, skipping insertion in model container [2021-02-23 22:35:29,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:35:29" (1/1) ... [2021-02-23 22:35:29,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 22:35:29,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 22:35:29,234 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_1011a.c[1145,1158] [2021-02-23 22:35:29,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:35:29,247 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 22:35:29,268 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_1011a.c[1145,1158] [2021-02-23 22:35:29,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:35:29,286 INFO L208 MainTranslator]: Completed translation [2021-02-23 22:35:29,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:29 WrapperNode [2021-02-23 22:35:29,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 22:35:29,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 22:35:29,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 22:35:29,289 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 22:35:29,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:29" (1/1) ... [2021-02-23 22:35:29,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:29" (1/1) ... [2021-02-23 22:35:29,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:29" (1/1) ... [2021-02-23 22:35:29,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:29" (1/1) ... [2021-02-23 22:35:29,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:29" (1/1) ... [2021-02-23 22:35:29,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:29" (1/1) ... [2021-02-23 22:35:29,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:29" (1/1) ... [2021-02-23 22:35:29,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 22:35:29,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 22:35:29,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 22:35:29,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 22:35:29,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:35:29,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 22:35:29,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 22:35:29,415 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 22:35:29,415 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_float [2021-02-23 22:35:29,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2021-02-23 22:35:29,416 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 22:35:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 22:35:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 22:35:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 22:35:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 22:35:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-23 22:35:29,417 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_float [2021-02-23 22:35:29,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-23 22:35:29,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 22:35:29,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 22:35:29,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 22:35:29,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-23 22:35:29,418 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2021-02-23 22:35:29,418 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 22:35:29,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 22:35:29,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 22:35:29,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 22:35:29,813 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 22:35:29,813 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-23 22:35:29,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:35:29 BoogieIcfgContainer [2021-02-23 22:35:29,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 22:35:29,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 22:35:29,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 22:35:29,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 22:35:29,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:35:29" (1/3) ... [2021-02-23 22:35:29,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251e784c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:35:29, skipping insertion in model container [2021-02-23 22:35:29,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:29" (2/3) ... [2021-02-23 22:35:29,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251e784c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:35:29, skipping insertion in model container [2021-02-23 22:35:29,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:35:29" (3/3) ... [2021-02-23 22:35:29,824 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1011a.c [2021-02-23 22:35:29,834 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 22:35:29,839 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 22:35:29,862 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 22:35:29,890 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 22:35:29,890 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 22:35:29,890 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 22:35:29,891 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 22:35:29,891 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 22:35:29,891 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 22:35:29,891 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 22:35:29,892 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 22:35:29,910 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2021-02-23 22:35:29,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-23 22:35:29,922 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:35:29,923 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] [2021-02-23 22:35:29,923 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:35:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:35:29,930 INFO L82 PathProgramCache]: Analyzing trace with hash -678865854, now seen corresponding path program 1 times [2021-02-23 22:35:29,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:35:29,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273779419] [2021-02-23 22:35:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:35:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:35:30,145 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:30,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:30,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:30,149 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:30,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:35:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:35:30,266 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:30,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:30,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 22:35:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:35:30,290 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:30,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:30,294 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:30,296 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 22:35:30,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273779419] [2021-02-23 22:35:30,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:35:30,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 22:35:30,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367731599] [2021-02-23 22:35:30,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 22:35:30,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:35:30,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 22:35:30,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 22:35:30,345 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2021-02-23 22:35:30,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:35:30,647 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2021-02-23 22:35:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 22:35:30,649 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-23 22:35:30,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:35:30,659 INFO L225 Difference]: With dead ends: 119 [2021-02-23 22:35:30,659 INFO L226 Difference]: Without dead ends: 60 [2021-02-23 22:35:30,663 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 [2021-02-23 22:35:30,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-02-23 22:35:30,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-02-23 22:35:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-23 22:35:30,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-02-23 22:35:30,714 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 29 [2021-02-23 22:35:30,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:35:30,714 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-02-23 22:35:30,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 22:35:30,715 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-02-23 22:35:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-23 22:35:30,716 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:35:30,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:35:30,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 22:35:30,717 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:35:30,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:35:30,718 INFO L82 PathProgramCache]: Analyzing trace with hash -2546907, now seen corresponding path program 1 times [2021-02-23 22:35:30,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:35:30,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513673063] [2021-02-23 22:35:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:35:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:35:30,766 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:35:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:35:30,797 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:35:30,834 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 22:35:30,834 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 22:35:30,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 22:35:30,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:35:30 BoogieIcfgContainer [2021-02-23 22:35:30,882 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 22:35:30,885 INFO L168 Benchmark]: Toolchain (without parser) took 1860.79 ms. Allocated memory is still 151.0 MB. Free memory was 127.3 MB in the beginning and 70.0 MB in the end (delta: 57.4 MB). Peak memory consumption was 58.6 MB. Max. memory is 8.0 GB. [2021-02-23 22:35:30,886 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 125.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 22:35:30,887 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.60 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 22:35:30,888 INFO L168 Benchmark]: Boogie Preprocessor took 40.22 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 114.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 22:35:30,889 INFO L168 Benchmark]: RCFGBuilder took 485.92 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 127.1 MB in the end (delta: -12.5 MB). Peak memory consumption was 17.7 MB. Max. memory is 8.0 GB. [2021-02-23 22:35:30,891 INFO L168 Benchmark]: TraceAbstraction took 1065.31 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 70.0 MB in the end (delta: 56.6 MB). Peak memory consumption was 56.6 MB. Max. memory is 8.0 GB. [2021-02-23 22:35:30,900 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 125.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 250.60 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.22 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 114.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 485.92 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 127.1 MB in the end (delta: -12.5 MB). Peak memory consumption was 17.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1065.31 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 70.0 MB in the end (delta: 56.6 MB). Peak memory consumption was 56.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 52]: 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 51, overapproximation of bitwiseAnd at line 23. Possible FailurePath: [L47] float x = 0.0f; VAL [x=0] [L48] CALL, EXPR fabs_float(x) VAL [\old(x)=0] [L15] __uint32_t ix; VAL [\old(x)=0, x=0] [L17] ieee_float_shape_type gf_u; VAL [\old(x)=0, gf_u={8:0}, x=0] [L18] gf_u.value = (x) VAL [\old(x)=0, gf_u={8:0}, x=0] [L19] EXPR gf_u.word VAL [\old(x)=0, gf_u={8:0}, gf_u.word=53, x=0] [L19] (ix) = gf_u.word VAL [\old(x)=0, gf_u={8:0}, gf_u.word=53, ix=53, x=0] [L22] ieee_float_shape_type sf_u; VAL [\old(x)=0, ix=53, sf_u={3:0}, x=0] [L23] sf_u.word = (ix & 0x7fffffff) VAL [\old(x)=0, ix=53, sf_u={3:0}, x=0] [L24] EXPR sf_u.value VAL [\old(x)=0, ix=53, sf_u={3:0}, sf_u.value=55, x=0] [L24] (x) = sf_u.value VAL [\old(x)=0, ix=53, sf_u={3:0}, sf_u.value=55, x=55] [L26] return x; VAL [\old(x)=0, \result=55, ix=53, x=55] [L48] RET, EXPR fabs_float(x) VAL [fabs_float(x)=55, x=0] [L48] float res = fabs_float(x); VAL [fabs_float(x)=55, res=55, x=0] [L51] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [res=55, res == 0.0f && __signbit_float(res) == 0=0, x=0] [L51] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) VAL [res=55, res == 0.0f && __signbit_float(res) == 0=0, x=0] [L52] reach_error() VAL [res=55, x=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 71 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 64 SDtfs, 11 SDslu, 42 SDs, 0 SdLazy, 76 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=68occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 72 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 1960 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...