/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_0730b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:24:37,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:24:37,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:24:37,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 00:24:37,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:24:37,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:24:37,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:24:37,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:24:37,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:24:37,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:24:37,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:24:37,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:24:37,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:24:37,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:24:37,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:24:37,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:24:37,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 00:24:37,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:24:37,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:24:37,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:24:37,331 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:24:37,355 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:24:37,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:24:37,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:24:37,360 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:24:37,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:24:37,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:24:37,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:24:37,361 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:24:37,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:24:37,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:24:37,363 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:24:37,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:24:37,364 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:24:37,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:24:37,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:24:37,364 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:24:37,365 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:24:37,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:24:37,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:24:37,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:24:37,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:24:37,366 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:24:37,366 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:24:37,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:24:37,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:24:37,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:24:37,757 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:24:37,758 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:24:37,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0730b.c [2020-11-07 00:24:37,852 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e4a8fc46/5d7dc55aad934a619bf1ff0650059548/FLAGf5bbd3b01 [2020-11-07 00:24:38,482 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:24:38,483 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_0730b.c [2020-11-07 00:24:38,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e4a8fc46/5d7dc55aad934a619bf1ff0650059548/FLAGf5bbd3b01 [2020-11-07 00:24:38,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e4a8fc46/5d7dc55aad934a619bf1ff0650059548 [2020-11-07 00:24:38,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:24:38,844 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:24:38,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:24:38,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:24:38,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:24:38,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:24:38" (1/1) ... [2020-11-07 00:24:38,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c1e436f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:38, skipping insertion in model container [2020-11-07 00:24:38,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:24:38" (1/1) ... [2020-11-07 00:24:38,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:24:38,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:24:39,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:24:39,072 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:24:39,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:24:39,124 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:24:39,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:39 WrapperNode [2020-11-07 00:24:39,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:24:39,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:24:39,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:24:39,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:24:39,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:39" (1/1) ... [2020-11-07 00:24:39,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:39" (1/1) ... [2020-11-07 00:24:39,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:39" (1/1) ... [2020-11-07 00:24:39,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:39" (1/1) ... [2020-11-07 00:24:39,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:39" (1/1) ... [2020-11-07 00:24:39,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:39" (1/1) ... [2020-11-07 00:24:39,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:39" (1/1) ... [2020-11-07 00:24:39,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:24:39,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:24:39,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:24:39,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:24:39,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:39" (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 [2020-11-07 00:24:39,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:24:39,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:24:39,269 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:24:39,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2020-11-07 00:24:39,270 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-11-07 00:24:39,270 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:24:39,270 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:24:39,270 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:24:39,270 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:24:39,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:24:39,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-11-07 00:24:39,271 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2020-11-07 00:24:39,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-07 00:24:39,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:24:39,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:24:39,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:24:39,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-11-07 00:24:39,272 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-11-07 00:24:39,272 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:24:39,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:24:39,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:24:39,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:24:39,850 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:24:39,852 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-07 00:24:39,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:24:39 BoogieIcfgContainer [2020-11-07 00:24:39,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:24:39,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:24:39,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:24:39,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:24:39,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:24:38" (1/3) ... [2020-11-07 00:24:39,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44300852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:24:39, skipping insertion in model container [2020-11-07 00:24:39,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:39" (2/3) ... [2020-11-07 00:24:39,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44300852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:24:39, skipping insertion in model container [2020-11-07 00:24:39,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:24:39" (3/3) ... [2020-11-07 00:24:39,871 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_0730b.c [2020-11-07 00:24:39,891 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:24:39,897 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:24:39,912 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:24:39,950 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:24:39,950 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:24:39,950 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:24:39,950 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:24:39,950 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:24:39,951 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:24:39,951 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:24:39,951 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:24:39,978 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states. [2020-11-07 00:24:39,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-07 00:24:39,993 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:24:39,994 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] [2020-11-07 00:24:39,995 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:24:40,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:24:40,004 INFO L82 PathProgramCache]: Analyzing trace with hash -238716340, now seen corresponding path program 1 times [2020-11-07 00:24:40,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:24:40,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654614418] [2020-11-07 00:24:40,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:24:40,115 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:24:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:24:40,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:24:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:24:40,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 00:24:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:24:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:24:40,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654614418] [2020-11-07 00:24:40,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:24:40,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:24:40,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613730926] [2020-11-07 00:24:40,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:24:40,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:24:40,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:24:40,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:24:40,479 INFO L87 Difference]: Start difference. First operand 129 states. Second operand 4 states. [2020-11-07 00:24:40,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:24:40,933 INFO L93 Difference]: Finished difference Result 229 states and 271 transitions. [2020-11-07 00:24:40,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:24:40,935 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-11-07 00:24:40,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:24:40,947 INFO L225 Difference]: With dead ends: 229 [2020-11-07 00:24:40,947 INFO L226 Difference]: Without dead ends: 119 [2020-11-07 00:24:40,951 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 [2020-11-07 00:24:40,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-11-07 00:24:41,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-11-07 00:24:41,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-07 00:24:41,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2020-11-07 00:24:41,009 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 41 [2020-11-07 00:24:41,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:24:41,010 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2020-11-07 00:24:41,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:24:41,010 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2020-11-07 00:24:41,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-07 00:24:41,012 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:24:41,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:24:41,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:24:41,013 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:24:41,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:24:41,014 INFO L82 PathProgramCache]: Analyzing trace with hash -990523059, now seen corresponding path program 1 times [2020-11-07 00:24:41,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:24:41,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189020493] [2020-11-07 00:24:41,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:24:41,017 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:24:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:24:41,064 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:24:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:24:41,096 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:24:41,142 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 00:24:41,142 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 00:24:41,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:24:41,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:24:41 BoogieIcfgContainer [2020-11-07 00:24:41,164 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:24:41,171 INFO L168 Benchmark]: Toolchain (without parser) took 2326.21 ms. Allocated memory was 125.8 MB in the beginning and 156.2 MB in the end (delta: 30.4 MB). Free memory was 102.9 MB in the beginning and 88.8 MB in the end (delta: 14.1 MB). Peak memory consumption was 45.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:24:41,172 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 125.8 MB. Free memory is still 101.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:24:41,175 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.63 ms. Allocated memory is still 125.8 MB. Free memory was 102.3 MB in the beginning and 91.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-11-07 00:24:41,176 INFO L168 Benchmark]: Boogie Preprocessor took 69.55 ms. Allocated memory is still 125.8 MB. Free memory was 91.4 MB in the beginning and 89.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 00:24:41,177 INFO L168 Benchmark]: RCFGBuilder took 659.59 ms. Allocated memory was 125.8 MB in the beginning and 156.2 MB in the end (delta: 30.4 MB). Free memory was 89.3 MB in the beginning and 124.2 MB in the end (delta: -34.9 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. [2020-11-07 00:24:41,178 INFO L168 Benchmark]: TraceAbstraction took 1305.10 ms. Allocated memory is still 156.2 MB. Free memory was 123.7 MB in the beginning and 88.8 MB in the end (delta: 34.9 MB). Peak memory consumption was 34.8 MB. Max. memory is 8.0 GB. [2020-11-07 00:24:41,188 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 125.8 MB. Free memory is still 101.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 279.63 ms. Allocated memory is still 125.8 MB. Free memory was 102.3 MB in the beginning and 91.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 69.55 ms. Allocated memory is still 125.8 MB. Free memory was 91.4 MB in the beginning and 89.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 659.59 ms. Allocated memory was 125.8 MB in the beginning and 156.2 MB in the end (delta: 30.4 MB). Free memory was 89.3 MB in the beginning and 124.2 MB in the end (delta: -34.9 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1305.10 ms. Allocated memory is still 156.2 MB. Free memory was 123.7 MB in the beginning and 88.8 MB in the end (delta: 34.9 MB). Peak memory consumption was 34.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 107, overapproximation of bitwiseAnd at line 26, overapproximation of someBinaryArithmeticFLOAToperation at line 29. Possible FailurePath: [L14] static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30; [L103] float x = 0.0f; [L104] CALL, EXPR __ieee754_sqrtf(x) [L17] float z; [L18] __uint32_t r, hx; [L19] __int32_t ix, s, q, m, t, i; [L22] ieee_float_shape_type gf_u; [L23] gf_u.value = (x) [L24] EXPR gf_u.word [L24] (ix) = gf_u.word [L26] hx = ix & 0x7fffffff [L28] COND TRUE !((hx) < 0x7f800000L) [L29] return x * x + x; [L104] RET, EXPR __ieee754_sqrtf(x) [L104] float res = __ieee754_sqrtf(x); [L107] EXPR res == 0.0f && __signbit_float(res) == 0 [L107] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L108] CALL reach_error() [L3] __assert_fail("0", "float_req_bl_0730b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 129 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 134 SDtfs, 29 SDslu, 97 SDs, 0 SdLazy, 141 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s 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=129occurred 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...