/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_1032b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:25:16,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:25:16,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:25:16,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:25:16,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:25:16,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:25:16,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:25:16,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:25:16,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:25:16,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:25:16,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:25:16,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:25:16,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:25:16,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:25:16,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:25:16,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:25:16,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:25:16,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:25:16,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:25:16,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:25:16,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:25:16,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:25:16,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:25:16,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:25:16,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:25:16,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:25:16,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:25:16,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:25:16,931 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 20:25:16,954 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:25:16,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:25:16,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:25:16,959 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:25:16,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:25:16,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:25:16,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:25:16,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:25:16,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:25:16,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:25:16,962 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:25:16,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:25:16,962 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:25:16,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:25:16,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:25:16,963 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:25:16,963 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:25:16,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:25:16,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:25:16,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:25:16,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:25:16,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:25:16,964 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:25:17,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:25:17,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:25:17,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:25:17,432 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:25:17,433 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:25:17,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032b.c [2020-10-23 20:25:17,529 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b229afaf2/3e1a1b9681454000884fa546073a43b7/FLAGe0177e3b6 [2020-10-23 20:25:18,172 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:25:18,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1032b.c [2020-10-23 20:25:18,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b229afaf2/3e1a1b9681454000884fa546073a43b7/FLAGe0177e3b6 [2020-10-23 20:25:18,564 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b229afaf2/3e1a1b9681454000884fa546073a43b7 [2020-10-23 20:25:18,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:25:18,576 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:25:18,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:25:18,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:25:18,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:25:18,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:25:18" (1/1) ... [2020-10-23 20:25:18,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5118ce94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:18, skipping insertion in model container [2020-10-23 20:25:18,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:25:18" (1/1) ... [2020-10-23 20:25:18,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:25:18,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:25:18,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:25:18,822 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:25:18,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:25:18,871 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:25:18,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:18 WrapperNode [2020-10-23 20:25:18,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:25:18,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:25:18,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:25:18,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:25:18,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:18" (1/1) ... [2020-10-23 20:25:18,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:18" (1/1) ... [2020-10-23 20:25:18,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:18" (1/1) ... [2020-10-23 20:25:18,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:18" (1/1) ... [2020-10-23 20:25:18,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:18" (1/1) ... [2020-10-23 20:25:18,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:18" (1/1) ... [2020-10-23 20:25:18,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:18" (1/1) ... [2020-10-23 20:25:18,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:25:18,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:25:18,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:25:18,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:25:18,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:18" (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 20:25:19,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:25:19,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:25:19,017 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:25:19,018 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2020-10-23 20:25:19,018 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-10-23 20:25:19,018 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:25:19,018 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:25:19,019 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:25:19,019 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:25:19,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:25:19,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-23 20:25:19,020 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2020-10-23 20:25:19,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-23 20:25:19,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:25:19,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:25:19,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:25:19,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-23 20:25:19,021 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-10-23 20:25:19,021 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:25:19,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:25:19,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:25:19,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:25:19,786 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:25:19,787 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-23 20:25:19,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:25:19 BoogieIcfgContainer [2020-10-23 20:25:19,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:25:19,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:25:19,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:25:19,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:25:19,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:25:18" (1/3) ... [2020-10-23 20:25:19,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696c33a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:25:19, skipping insertion in model container [2020-10-23 20:25:19,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:18" (2/3) ... [2020-10-23 20:25:19,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696c33a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:25:19, skipping insertion in model container [2020-10-23 20:25:19,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:25:19" (3/3) ... [2020-10-23 20:25:19,800 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1032b.c [2020-10-23 20:25:19,814 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:25:19,822 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:25:19,839 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:25:19,873 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:25:19,873 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:25:19,873 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:25:19,873 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:25:19,873 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:25:19,874 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:25:19,874 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:25:19,874 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:25:19,891 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2020-10-23 20:25:19,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 20:25:19,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:25:19,904 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] [2020-10-23 20:25:19,904 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:25:19,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:25:19,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1171811311, now seen corresponding path program 1 times [2020-10-23 20:25:19,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:25:19,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763417510] [2020-10-23 20:25:19,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:25:20,004 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:25:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:20,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:25:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:20,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:25:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:20,286 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 20:25:20,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763417510] [2020-10-23 20:25:20,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:25:20,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:25:20,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595933333] [2020-10-23 20:25:20,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:25:20,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:25:20,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:25:20,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:25:20,316 INFO L87 Difference]: Start difference. First operand 92 states. Second operand 4 states. [2020-10-23 20:25:21,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:25:21,024 INFO L93 Difference]: Finished difference Result 164 states and 190 transitions. [2020-10-23 20:25:21,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:25:21,027 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-23 20:25:21,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:25:21,049 INFO L225 Difference]: With dead ends: 164 [2020-10-23 20:25:21,049 INFO L226 Difference]: Without dead ends: 82 [2020-10-23 20:25:21,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:25:21,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-23 20:25:21,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-23 20:25:21,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-23 20:25:21,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2020-10-23 20:25:21,112 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 33 [2020-10-23 20:25:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:25:21,113 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2020-10-23 20:25:21,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:25:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2020-10-23 20:25:21,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-23 20:25:21,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:25:21,115 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] [2020-10-23 20:25:21,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:25:21,118 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:25:21,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:25:21,124 INFO L82 PathProgramCache]: Analyzing trace with hash 975669994, now seen corresponding path program 1 times [2020-10-23 20:25:21,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:25:21,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361898558] [2020-10-23 20:25:21,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:25:21,128 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:25:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:25:21,212 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:25:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:25:21,266 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:25:21,313 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:25:21,313 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:25:21,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:25:21,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:25:21 BoogieIcfgContainer [2020-10-23 20:25:21,335 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:25:21,340 INFO L168 Benchmark]: Toolchain (without parser) took 2766.62 ms. Allocated memory is still 154.1 MB. Free memory was 130.6 MB in the beginning and 125.6 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.5 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:21,343 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 154.1 MB. Free memory is still 128.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:25:21,346 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.64 ms. Allocated memory is still 154.1 MB. Free memory was 130.1 MB in the beginning and 119.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:21,348 INFO L168 Benchmark]: Boogie Preprocessor took 49.71 ms. Allocated memory is still 154.1 MB. Free memory was 119.4 MB in the beginning and 117.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:21,349 INFO L168 Benchmark]: RCFGBuilder took 865.48 ms. Allocated memory is still 154.1 MB. Free memory was 117.6 MB in the beginning and 126.5 MB in the end (delta: -8.9 MB). Peak memory consumption was 16.2 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:21,351 INFO L168 Benchmark]: TraceAbstraction took 1542.95 ms. Allocated memory is still 154.1 MB. Free memory was 126.0 MB in the beginning and 125.6 MB in the end (delta: 357.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:25:21,364 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 154.1 MB. Free memory is still 128.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 290.64 ms. Allocated memory is still 154.1 MB. Free memory was 130.1 MB in the beginning and 119.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.71 ms. Allocated memory is still 154.1 MB. Free memory was 119.4 MB in the beginning and 117.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 865.48 ms. Allocated memory is still 154.1 MB. Free memory was 117.6 MB in the beginning and 126.5 MB in the end (delta: -8.9 MB). Peak memory consumption was 16.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1542.95 ms. Allocated memory is still 154.1 MB. Free memory was 126.0 MB in the beginning and 125.6 MB in the end (delta: 357.6 kB). There was no memory consumed. 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 81, overapproximation of bitwiseAnd at line 25, overapproximation of someUnaryFLOAToperation at line 77, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L77] float x = -0.0f; [L78] CALL, EXPR round_float(x) [L15] __uint32_t w; [L17] int exponent_less_127; [L20] ieee_float_shape_type gf_u; [L21] gf_u.value = (x) [L22] EXPR gf_u.word [L22] (w) = gf_u.word [L25] exponent_less_127 = (int)((w & 0x7f800000) >> 23) - 127 [L27] COND FALSE !(exponent_less_127 < 23) [L43] COND TRUE exponent_less_127 == 128 [L45] return x + x; [L78] RET, EXPR round_float(x) [L78] float res = round_float(x); [L81] EXPR res == -0.0f && __signbit_float(res) == 1 [L81] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L82] CALL reach_error() [L3] __assert_fail("0", "float_req_bl_1032b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 92 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 91 SDtfs, 15 SDslu, 63 SDs, 0 SdLazy, 103 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, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred 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...