/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-b8ad66e [2020-10-23 20:25:10,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:25:10,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:25:10,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 20:25:10,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:25:10,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:25:10,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:25:10,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:25:10,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:25:10,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:25:10,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:25:10,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:25:10,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:25:10,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:25:10,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:25:10,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:25:10,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:25:10,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:25:10,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:25:10,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:25:10,228 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:25:10,250 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:25:10,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:25:10,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:25:10,256 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:25:10,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:25:10,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:25:10,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:25:10,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:25:10,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:25:10,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:25:10,258 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:25:10,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:25:10,259 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:25:10,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:25:10,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:25:10,260 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:25:10,260 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:25:10,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:25:10,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:25:10,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:25:10,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:25:10,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:25:10,261 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:25:10,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:25:10,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:25:10,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:25:10,684 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:25:10,685 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:25:10,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0730b.c [2020-10-23 20:25:10,765 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c93009f6/d1dbd3e2485046f29eb337c97f59bf4c/FLAGff93dfdb9 [2020-10-23 20:25:11,434 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:25:11,435 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_0730b.c [2020-10-23 20:25:11,443 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c93009f6/d1dbd3e2485046f29eb337c97f59bf4c/FLAGff93dfdb9 [2020-10-23 20:25:11,792 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c93009f6/d1dbd3e2485046f29eb337c97f59bf4c [2020-10-23 20:25:11,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:25:11,806 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:25:11,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:25:11,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:25:11,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:25:11,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:25:11" (1/1) ... [2020-10-23 20:25:11,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d1af595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:11, skipping insertion in model container [2020-10-23 20:25:11,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:25:11" (1/1) ... [2020-10-23 20:25:11,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:25:11,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:25:12,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:25:12,124 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:25:12,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:25:12,228 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:25:12,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:12 WrapperNode [2020-10-23 20:25:12,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:25:12,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:25:12,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:25:12,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:25:12,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:12" (1/1) ... [2020-10-23 20:25:12,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:12" (1/1) ... [2020-10-23 20:25:12,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:12" (1/1) ... [2020-10-23 20:25:12,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:12" (1/1) ... [2020-10-23 20:25:12,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:12" (1/1) ... [2020-10-23 20:25:12,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:12" (1/1) ... [2020-10-23 20:25:12,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:12" (1/1) ... [2020-10-23 20:25:12,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:25:12,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:25:12,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:25:12,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:25:12,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:12" (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 [2020-10-23 20:25:12,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:25:12,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:25:12,385 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:25:12,386 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2020-10-23 20:25:12,386 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-10-23 20:25:12,386 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:25:12,386 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:25:12,386 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:25:12,387 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:25:12,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:25:12,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-23 20:25:12,388 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2020-10-23 20:25:12,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-23 20:25:12,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:25:12,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:25:12,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:25:12,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-23 20:25:12,389 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-10-23 20:25:12,390 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:25:12,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:25:12,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:25:12,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:25:13,311 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:25:13,311 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-23 20:25:13,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:25:13 BoogieIcfgContainer [2020-10-23 20:25:13,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:25:13,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:25:13,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:25:13,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:25:13,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:25:11" (1/3) ... [2020-10-23 20:25:13,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6acd94d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:25:13, skipping insertion in model container [2020-10-23 20:25:13,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:12" (2/3) ... [2020-10-23 20:25:13,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6acd94d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:25:13, skipping insertion in model container [2020-10-23 20:25:13,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:25:13" (3/3) ... [2020-10-23 20:25:13,323 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_0730b.c [2020-10-23 20:25:13,336 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:25:13,341 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:25:13,355 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:25:13,380 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:25:13,381 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:25:13,381 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:25:13,381 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:25:13,381 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:25:13,381 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:25:13,381 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:25:13,382 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:25:13,398 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states. [2020-10-23 20:25:13,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 20:25:13,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:25:13,411 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] [2020-10-23 20:25:13,411 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:25:13,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:25:13,418 INFO L82 PathProgramCache]: Analyzing trace with hash -238716340, now seen corresponding path program 1 times [2020-10-23 20:25:13,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:25:13,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853153681] [2020-10-23 20:25:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:25:13,503 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:25:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:13,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:25:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:13,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 20:25:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:25:13,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853153681] [2020-10-23 20:25:13,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:25:13,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:25:13,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635582945] [2020-10-23 20:25:13,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:25:13,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:25:13,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:25:13,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:25:13,804 INFO L87 Difference]: Start difference. First operand 129 states. Second operand 4 states. [2020-10-23 20:25:14,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:25:14,431 INFO L93 Difference]: Finished difference Result 229 states and 271 transitions. [2020-10-23 20:25:14,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:25:14,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-23 20:25:14,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:25:14,445 INFO L225 Difference]: With dead ends: 229 [2020-10-23 20:25:14,445 INFO L226 Difference]: Without dead ends: 119 [2020-10-23 20:25:14,449 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 [2020-10-23 20:25:14,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-23 20:25:14,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-10-23 20:25:14,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-23 20:25:14,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2020-10-23 20:25:14,510 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 41 [2020-10-23 20:25:14,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:25:14,511 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2020-10-23 20:25:14,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:25:14,511 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2020-10-23 20:25:14,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-23 20:25:14,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:25:14,513 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] [2020-10-23 20:25:14,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:25:14,514 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:25:14,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:25:14,515 INFO L82 PathProgramCache]: Analyzing trace with hash -990523059, now seen corresponding path program 1 times [2020-10-23 20:25:14,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:25:14,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045764296] [2020-10-23 20:25:14,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:25:14,519 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:25:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:25:14,592 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:25:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:25:14,627 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:25:14,663 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:25:14,664 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:25:14,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:25:14,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:25:14 BoogieIcfgContainer [2020-10-23 20:25:14,682 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:25:14,685 INFO L168 Benchmark]: Toolchain (without parser) took 2883.32 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 103.7 MB in the end (delta: 23.7 MB). Peak memory consumption was 24.3 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:14,686 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:25:14,687 INFO L168 Benchmark]: CACSL2BoogieTranslator took 422.22 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 115.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:14,688 INFO L168 Benchmark]: Boogie Preprocessor took 56.73 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 113.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:14,688 INFO L168 Benchmark]: RCFGBuilder took 1025.44 ms. Allocated memory is still 151.0 MB. Free memory was 113.7 MB in the beginning and 119.7 MB in the end (delta: -6.0 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:14,689 INFO L168 Benchmark]: TraceAbstraction took 1367.22 ms. Allocated memory is still 151.0 MB. Free memory was 119.7 MB in the beginning and 103.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:14,693 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 422.22 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 115.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 56.73 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 113.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1025.44 ms. Allocated memory is still 151.0 MB. Free memory was 113.7 MB in the beginning and 119.7 MB in the end (delta: -6.0 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1367.22 ms. Allocated memory is still 151.0 MB. Free memory was 119.7 MB in the beginning and 103.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 17.1 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: 1.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.6s, 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, 0.3s 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...