/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_0730b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 17:55:39,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 17:55:39,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 17:55:39,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 17:55:39,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 17:55:39,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 17:55:39,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 17:55:39,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 17:55:39,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 17:55:39,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 17:55:39,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 17:55:39,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 17:55:39,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 17:55:39,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 17:55:39,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 17:55:39,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 17:55:39,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 17:55:39,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 17:55:39,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 17:55:39,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 17:55:39,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 17:55:39,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 17:55:39,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 17:55:39,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 17:55:39,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 17:55:39,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 17:55:39,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 17:55:39,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 17:55:39,273 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 17:55:39,326 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 17:55:39,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 17:55:39,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 17:55:39,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 17:55:39,331 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 17:55:39,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 17:55:39,331 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 17:55:39,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 17:55:39,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 17:55:39,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 17:55:39,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 17:55:39,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 17:55:39,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 17:55:39,334 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 17:55:39,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 17:55:39,334 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 17:55:39,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 17:55:39,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 17:55:39,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 17:55:39,335 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 17:55:39,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 17:55:39,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 17:55:39,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 17:55:39,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 17:55:39,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 17:55:39,337 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 17:55:39,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 17:55:39,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 17:55:39,337 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 17:55:39,337 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 17:55:39,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 17:55:39,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 17:55:39,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 17:55:39,797 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 17:55:39,798 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 17:55:39,799 INFO L432 ainManager$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 17:55:39,888 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74dd89f7b/67e3acc770cd474abf2dbacabef16120/FLAGdadc54210 [2020-10-23 17:55:40,496 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 17:55:40,497 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_0730b.c [2020-10-23 17:55:40,507 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74dd89f7b/67e3acc770cd474abf2dbacabef16120/FLAGdadc54210 [2020-10-23 17:55:40,878 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74dd89f7b/67e3acc770cd474abf2dbacabef16120 [2020-10-23 17:55:40,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 17:55:40,890 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 17:55:40,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 17:55:40,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 17:55:40,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 17:55:40,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:55:40" (1/1) ... [2020-10-23 17:55:40,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29e45c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:40, skipping insertion in model container [2020-10-23 17:55:40,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:55:40" (1/1) ... [2020-10-23 17:55:40,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 17:55:40,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 17:55:41,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:55:41,233 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 17:55:41,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:55:41,318 INFO L208 MainTranslator]: Completed translation [2020-10-23 17:55:41,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:41 WrapperNode [2020-10-23 17:55:41,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 17:55:41,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 17:55:41,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 17:55:41,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 17:55:41,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:41" (1/1) ... [2020-10-23 17:55:41,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:41" (1/1) ... [2020-10-23 17:55:41,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:41" (1/1) ... [2020-10-23 17:55:41,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:41" (1/1) ... [2020-10-23 17:55:41,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:41" (1/1) ... [2020-10-23 17:55:41,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:41" (1/1) ... [2020-10-23 17:55:41,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:41" (1/1) ... [2020-10-23 17:55:41,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 17:55:41,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 17:55:41,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 17:55:41,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 17:55:41,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:41" (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 17:55:41,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 17:55:41,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 17:55:41,443 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 17:55:41,443 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2020-10-23 17:55:41,444 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-10-23 17:55:41,444 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 17:55:41,444 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 17:55:41,444 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 17:55:41,444 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 17:55:41,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 17:55:41,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-23 17:55:41,445 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2020-10-23 17:55:41,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-23 17:55:41,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 17:55:41,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 17:55:41,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 17:55:41,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-23 17:55:41,446 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-10-23 17:55:41,446 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 17:55:41,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 17:55:41,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 17:55:41,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 17:55:41,915 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 17:55:41,915 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-23 17:55:41,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:55:41 BoogieIcfgContainer [2020-10-23 17:55:41,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 17:55:41,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 17:55:41,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 17:55:41,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 17:55:41,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:55:40" (1/3) ... [2020-10-23 17:55:41,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0a665b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:55:41, skipping insertion in model container [2020-10-23 17:55:41,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:41" (2/3) ... [2020-10-23 17:55:41,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0a665b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:55:41, skipping insertion in model container [2020-10-23 17:55:41,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:55:41" (3/3) ... [2020-10-23 17:55:41,926 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_0730b.c [2020-10-23 17:55:41,937 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 17:55:41,942 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 17:55:41,954 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 17:55:41,980 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 17:55:41,981 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 17:55:41,981 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 17:55:41,981 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 17:55:41,981 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 17:55:41,981 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 17:55:41,981 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 17:55:41,981 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 17:55:41,998 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-23 17:55:42,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 17:55:42,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:55:42,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:55:42,005 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:55:42,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:55:42,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1829003849, now seen corresponding path program 1 times [2020-10-23 17:55:42,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:55:42,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139193327] [2020-10-23 17:55:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:55:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:55:42,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:55:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:55:42,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:55:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:55:42,384 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 17:55:42,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139193327] [2020-10-23 17:55:42,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:55:42,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 17:55:42,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449549027] [2020-10-23 17:55:42,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 17:55:42,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:55:42,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 17:55:42,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 17:55:42,410 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 4 states. [2020-10-23 17:55:42,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:55:42,698 INFO L93 Difference]: Finished difference Result 97 states and 139 transitions. [2020-10-23 17:55:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 17:55:42,701 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-23 17:55:42,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:55:42,710 INFO L225 Difference]: With dead ends: 97 [2020-10-23 17:55:42,711 INFO L226 Difference]: Without dead ends: 47 [2020-10-23 17:55:42,716 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 17:55:42,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-23 17:55:42,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-23 17:55:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 17:55:42,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2020-10-23 17:55:42,790 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 18 [2020-10-23 17:55:42,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:55:42,791 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2020-10-23 17:55:42,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 17:55:42,791 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2020-10-23 17:55:42,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 17:55:42,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:55:42,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:55:42,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 17:55:42,795 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:55:42,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:55:42,796 INFO L82 PathProgramCache]: Analyzing trace with hash -233399702, now seen corresponding path program 1 times [2020-10-23 17:55:42,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:55:42,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245297563] [2020-10-23 17:55:42,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:55:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 17:55:42,904 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 17:55:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 17:55:42,945 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 17:55:42,975 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 17:55:42,976 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 17:55:42,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 17:55:43,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 05:55:43 BoogieIcfgContainer [2020-10-23 17:55:43,011 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 17:55:43,013 INFO L168 Benchmark]: Toolchain (without parser) took 2128.69 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 71.4 MB in the end (delta: 55.4 MB). Peak memory consumption was 56.4 MB. Max. memory is 8.0 GB. [2020-10-23 17:55:43,014 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 17:55:43,015 INFO L168 Benchmark]: CACSL2BoogieTranslator took 425.69 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 115.1 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 17:55:43,018 INFO L168 Benchmark]: Boogie Preprocessor took 45.67 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 113.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 17:55:43,019 INFO L168 Benchmark]: RCFGBuilder took 550.43 ms. Allocated memory is still 151.0 MB. Free memory was 113.1 MB in the beginning and 125.7 MB in the end (delta: -12.6 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. [2020-10-23 17:55:43,020 INFO L168 Benchmark]: TraceAbstraction took 1092.11 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 71.4 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 8.0 GB. [2020-10-23 17:55:43,026 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 425.69 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 115.1 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.67 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 113.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 550.43 ms. Allocated memory is still 151.0 MB. Free memory was 113.1 MB in the beginning and 125.7 MB in the end (delta: -12.6 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1092.11 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 71.4 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 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; VAL [\old(one_sqrt)=2139095044, \old(tiny_sqrt)=2139095052, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L103] float x = 0.0f; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=0] [L104] CALL, EXPR __ieee754_sqrtf(x) VAL [\old(x)=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L17] float z; [L18] __uint32_t r, hx; [L19] __int32_t ix, s, q, m, t, i; VAL [\old(x)=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=0] [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 VAL [\old(x)=0, ix=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=0] [L28] COND TRUE !((hx) < 0x7f800000L) [L29] return x * x + x; VAL [\old(x)=0, hx=2139095040, ix=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=0] [L104] RET, EXPR __ieee754_sqrtf(x) VAL [__ieee754_sqrtf(x)=2139095043, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=0] [L104] float res = __ieee754_sqrtf(x); [L107] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [one_sqrt=1, res=2139095043, res == 0.0f && __signbit_float(res) == 0=0, tiny_sqrt=1/1000000000000000000000000000000, x=0] [L107] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L108] CALL reach_error() VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L3] __assert_fail("0", "float_req_bl_0730b.c", 3, "reach_error") VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 54 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: 59 SDtfs, 8 SDslu, 52 SDs, 0 SdLazy, 57 SolverSat, 8 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=54occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 1105 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...