/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1031.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:03:53,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:03:53,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:03:53,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:03:53,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:03:53,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:03:53,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:03:53,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:03:53,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:03:53,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:03:53,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:03:53,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:03:53,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:03:53,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:03:53,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:03:53,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:03:53,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:03:53,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:03:53,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:03:53,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:03:53,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:03:53,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:03:53,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:03:53,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:03:53,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 17:03:53,152 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 17:03:53,153 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 17:03:53,154 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 17:03:53,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 17:03:53,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 17:03:53,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 17:03:53,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 17:03:53,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 17:03:53,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 17:03:53,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 17:03:53,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 17:03:53,159 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 17:03:53,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 17:03:53,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:03:53,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:03:53,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:03:53,162 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:03:53,173 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:03:53,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:03:53,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:03:53,174 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:03:53,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:03:53,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:03:53,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:03:53,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:03:53,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:03:53,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:03:53,176 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:03:53,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:03:53,176 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:03:53,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:03:53,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:03:53,177 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:03:53,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:03:53,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:03:53,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:03:53,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:03:53,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:03:53,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:03:53,178 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-07-17 17:03:53,459 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:03:53,481 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:03:53,484 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:03:53,486 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:03:53,486 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:03:53,488 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1031.c [2020-07-17 17:03:53,565 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/195c2196b/db4ecf894e7d48ec88586165386348cc/FLAGd80f812dd [2020-07-17 17:03:54,051 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:03:54,052 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1031.c [2020-07-17 17:03:54,059 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/195c2196b/db4ecf894e7d48ec88586165386348cc/FLAGd80f812dd [2020-07-17 17:03:54,461 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/195c2196b/db4ecf894e7d48ec88586165386348cc [2020-07-17 17:03:54,471 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:03:54,474 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:03:54,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:03:54,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:03:54,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:03:54,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:03:54" (1/1) ... [2020-07-17 17:03:54,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64147cce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:03:54, skipping insertion in model container [2020-07-17 17:03:54,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:03:54" (1/1) ... [2020-07-17 17:03:54,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:03:54,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:03:54,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:03:54,685 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:03:54,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:03:54,809 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:03:54,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:03:54 WrapperNode [2020-07-17 17:03:54,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:03:54,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:03:54,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:03:54,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:03:54,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:03:54" (1/1) ... [2020-07-17 17:03:54,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:03:54" (1/1) ... [2020-07-17 17:03:54,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:03:54" (1/1) ... [2020-07-17 17:03:54,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:03:54" (1/1) ... [2020-07-17 17:03:54,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:03:54" (1/1) ... [2020-07-17 17:03:54,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:03:54" (1/1) ... [2020-07-17 17:03:54,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:03:54" (1/1) ... [2020-07-17 17:03:54,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:03:54,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:03:54,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:03:54,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:03:54,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:03:54" (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 [2020-07-17 17:03:54,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:03:54,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:03:54,914 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2020-07-17 17:03:54,914 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-07-17 17:03:54,914 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:03:54,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:03:54,915 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2020-07-17 17:03:54,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 17:03:54,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-17 17:03:54,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 17:03:54,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 17:03:54,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 17:03:54,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-17 17:03:54,916 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-07-17 17:03:54,916 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:03:54,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:03:54,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:03:55,211 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:03:55,211 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-17 17:03:55,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:03:55 BoogieIcfgContainer [2020-07-17 17:03:55,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:03:55,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:03:55,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:03:55,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:03:55,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:03:54" (1/3) ... [2020-07-17 17:03:55,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328685a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:03:55, skipping insertion in model container [2020-07-17 17:03:55,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:03:54" (2/3) ... [2020-07-17 17:03:55,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328685a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:03:55, skipping insertion in model container [2020-07-17 17:03:55,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:03:55" (3/3) ... [2020-07-17 17:03:55,226 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1031.c [2020-07-17 17:03:55,244 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:03:55,259 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:03:55,285 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:03:55,308 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:03:55,308 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:03:55,308 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:03:55,309 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:03:55,309 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:03:55,309 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:03:55,309 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:03:55,309 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:03:55,327 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-07-17 17:03:55,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-17 17:03:55,344 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:03:55,345 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] [2020-07-17 17:03:55,345 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:03:55,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:03:55,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1002488425, now seen corresponding path program 1 times [2020-07-17 17:03:55,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:03:55,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514527120] [2020-07-17 17:03:55,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:03:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:03:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:03:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:03:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:03:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:03:55,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514527120] [2020-07-17 17:03:55,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:03:55,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 17:03:55,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788223331] [2020-07-17 17:03:55,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 17:03:55,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:03:55,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 17:03:55,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 17:03:55,608 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-07-17 17:03:55,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:03:55,831 INFO L93 Difference]: Finished difference Result 123 states and 141 transitions. [2020-07-17 17:03:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 17:03:55,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-07-17 17:03:55,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:03:55,845 INFO L225 Difference]: With dead ends: 123 [2020-07-17 17:03:55,846 INFO L226 Difference]: Without dead ends: 61 [2020-07-17 17:03:55,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:03:55,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-17 17:03:55,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-17 17:03:55,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-17 17:03:55,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-07-17 17:03:55,896 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 30 [2020-07-17 17:03:55,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:03:55,897 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-07-17 17:03:55,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 17:03:55,897 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-07-17 17:03:55,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-17 17:03:55,899 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:03:55,899 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] [2020-07-17 17:03:55,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:03:55,900 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:03:55,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:03:55,900 INFO L82 PathProgramCache]: Analyzing trace with hash 615125563, now seen corresponding path program 1 times [2020-07-17 17:03:55,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:03:55,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459028502] [2020-07-17 17:03:55,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:03:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:03:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:03:56,077 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 17:03:56,078 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 17:03:56,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:03:56,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 05:03:56 BoogieIcfgContainer [2020-07-17 17:03:56,117 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 17:03:56,120 INFO L168 Benchmark]: Toolchain (without parser) took 1646.24 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 103.2 MB in the beginning and 106.1 MB in the end (delta: -2.9 MB). Peak memory consumption was 60.0 MB. Max. memory is 7.1 GB. [2020-07-17 17:03:56,121 INFO L168 Benchmark]: CDTParser took 0.80 ms. Allocated memory is still 137.9 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-17 17:03:56,122 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.74 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 102.7 MB in the beginning and 179.8 MB in the end (delta: -77.1 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-07-17 17:03:56,123 INFO L168 Benchmark]: Boogie Preprocessor took 44.17 ms. Allocated memory is still 200.8 MB. Free memory was 179.8 MB in the beginning and 177.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-17 17:03:56,124 INFO L168 Benchmark]: RCFGBuilder took 362.12 ms. Allocated memory is still 200.8 MB. Free memory was 177.4 MB in the beginning and 157.0 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2020-07-17 17:03:56,125 INFO L168 Benchmark]: TraceAbstraction took 898.58 ms. Allocated memory is still 200.8 MB. Free memory was 157.0 MB in the beginning and 106.1 MB in the end (delta: 51.0 MB). Peak memory consumption was 51.0 MB. Max. memory is 7.1 GB. [2020-07-17 17:03:56,130 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.80 ms. Allocated memory is still 137.9 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 334.74 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 102.7 MB in the beginning and 179.8 MB in the end (delta: -77.1 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.17 ms. Allocated memory is still 200.8 MB. Free memory was 179.8 MB in the beginning and 177.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 362.12 ms. Allocated memory is still 200.8 MB. Free memory was 177.4 MB in the beginning and 157.0 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 898.58 ms. Allocated memory is still 200.8 MB. Free memory was 157.0 MB in the beginning and 106.1 MB in the end (delta: 51.0 MB). Peak memory consumption was 51.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 70]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 55, overapproximation of someBinaryArithmeticFLOAToperation at line 42, overapproximation of bitwiseAnd at line 22. Possible FailurePath: [L65] float x = 0.0f / 0.0f; [L66] CALL, EXPR round_float(x) VAL [\old(x)=2139095047] [L12] __uint32_t w; VAL [\old(x)=2139095047, x=2139095047] [L14] int exponent_less_127; VAL [\old(x)=2139095047, x=2139095047] [L17] ieee_float_shape_type gf_u; VAL [\old(x)=2139095047, gf_u={2:0}, x=2139095047] [L18] gf_u.value = (x) VAL [\old(x)=2139095047, gf_u={2:0}, x=2139095047] [L19] EXPR gf_u.word VAL [\old(x)=2139095047, gf_u={2:0}, gf_u.word=2139095042, x=2139095047] [L19] (w) = gf_u.word VAL [(w) = gf_u.word=2139095043, \old(x)=2139095047, gf_u={2:0}, gf_u.word=2139095042, w=2139095042, x=2139095047] [L22] exponent_less_127 = (int)((w & 0x7f800000) >> 23) - 127 VAL [\old(x)=2139095047, exponent_less_127=128, w=2139095042, x=2139095047] [L24] COND FALSE !(exponent_less_127 < 23) VAL [\old(x)=2139095047, exponent_less_127=128, w=2139095042, x=2139095047] [L40] COND TRUE exponent_less_127 == 128 VAL [\old(x)=2139095047, exponent_less_127=128, w=2139095042, x=2139095047] [L42] return x + x; VAL [\old(x)=2139095047, exponent_less_127=128, w=2139095042, x=2139095047] [L66] RET, EXPR round_float(x) VAL [round_float(x)=2139095044, x=2139095047] [L66] float res = round_float(x); VAL [res=2139095044, round_float(x)=2139095044, x=2139095047] [L69] CALL, EXPR isnan_float(res) VAL [\old(x)=2139095044] [L55] return x != x; VAL [\old(x)=2139095044, \result=0, x=2139095044] [L69] RET, EXPR isnan_float(res) VAL [isnan_float(res)=0, res=2139095044, x=2139095047] [L69] COND TRUE !isnan_float(res) VAL [isnan_float(res)=0, res=2139095044, x=2139095047] [L70] __VERIFIER_error() VAL [res=2139095044, x=2139095047] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 68 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 69 SDtfs, 15 SDslu, 49 SDs, 0 SdLazy, 72 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 29 ConstructedInterpolants, 0 QuantifiedInterpolants, 1450 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...