/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_1072a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 21:36:55,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 21:36:55,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 21:36:55,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 21:36:55,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 21:36:55,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 21:36:55,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 21:36:55,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 21:36:55,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 21:36:55,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 21:36:55,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 21:36:55,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 21:36:55,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 21:36:55,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 21:36:55,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 21:36:55,278 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 21:36:55,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 21:36:55,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 21:36:55,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 21:36:55,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 21:36:55,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 21:36:55,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 21:36:55,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 21:36:55,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 21:36:55,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 21:36:55,310 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 21:36:55,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 21:36:55,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 21:36:55,319 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 21:36:55,320 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 21:36:55,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 21:36:55,321 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 21:36:55,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 21:36:55,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 21:36:55,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 21:36:55,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 21:36:55,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 21:36:55,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 21:36:55,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 21:36:55,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 21:36:55,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 21:36:55,334 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 21:36:55,351 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 21:36:55,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 21:36:55,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 21:36:55,354 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 21:36:55,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 21:36:55,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 21:36:55,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 21:36:55,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 21:36:55,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 21:36:55,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 21:36:55,357 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 21:36:55,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 21:36:55,357 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 21:36:55,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 21:36:55,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 21:36:55,358 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 21:36:55,358 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 21:36:55,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 21:36:55,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 21:36:55,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 21:36:55,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 21:36:55,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 21:36:55,360 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 [2020-09-04 21:36:55,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 21:36:55,848 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 21:36:55,851 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 21:36:55,853 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 21:36:55,853 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 21:36:55,854 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072a.c [2020-09-04 21:36:55,946 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e313c7e79/f8478859b9004837aedb3db365821d4f/FLAGd01193f9c [2020-09-04 21:36:56,485 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 21:36:56,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1072a.c [2020-09-04 21:36:56,495 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e313c7e79/f8478859b9004837aedb3db365821d4f/FLAGd01193f9c [2020-09-04 21:36:56,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e313c7e79/f8478859b9004837aedb3db365821d4f [2020-09-04 21:36:56,833 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 21:36:56,835 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 21:36:56,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 21:36:56,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 21:36:56,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 21:36:56,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 09:36:56" (1/1) ... [2020-09-04 21:36:56,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52db61f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:56, skipping insertion in model container [2020-09-04 21:36:56,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 09:36:56" (1/1) ... [2020-09-04 21:36:56,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 21:36:56,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 21:36:57,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 21:36:57,111 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 21:36:57,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 21:36:57,174 INFO L208 MainTranslator]: Completed translation [2020-09-04 21:36:57,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:57 WrapperNode [2020-09-04 21:36:57,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 21:36:57,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 21:36:57,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 21:36:57,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 21:36:57,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:57" (1/1) ... [2020-09-04 21:36:57,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:57" (1/1) ... [2020-09-04 21:36:57,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:57" (1/1) ... [2020-09-04 21:36:57,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:57" (1/1) ... [2020-09-04 21:36:57,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:57" (1/1) ... [2020-09-04 21:36:57,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:57" (1/1) ... [2020-09-04 21:36:57,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:57" (1/1) ... [2020-09-04 21:36:57,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 21:36:57,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 21:36:57,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 21:36:57,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 21:36:57,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 21:36:57,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 21:36:57,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 21:36:57,397 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2020-09-04 21:36:57,398 INFO L138 BoogieDeclarations]: Found implementation of procedure isinf_float [2020-09-04 21:36:57,398 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 21:36:57,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 21:36:57,398 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2020-09-04 21:36:57,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 21:36:57,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-04 21:36:57,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 21:36:57,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 21:36:57,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 21:36:57,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-04 21:36:57,400 INFO L130 BoogieDeclarations]: Found specification of procedure isinf_float [2020-09-04 21:36:57,400 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 21:36:57,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 21:36:57,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 21:36:57,824 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 21:36:57,824 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-04 21:36:57,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 09:36:57 BoogieIcfgContainer [2020-09-04 21:36:57,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 21:36:57,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 21:36:57,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 21:36:57,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 21:36:57,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 09:36:56" (1/3) ... [2020-09-04 21:36:57,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@260af98c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 09:36:57, skipping insertion in model container [2020-09-04 21:36:57,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:57" (2/3) ... [2020-09-04 21:36:57,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@260af98c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 09:36:57, skipping insertion in model container [2020-09-04 21:36:57,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 09:36:57" (3/3) ... [2020-09-04 21:36:57,845 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1072a.c [2020-09-04 21:36:57,856 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 21:36:57,867 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 21:36:57,890 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 21:36:57,915 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 21:36:57,915 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 21:36:57,915 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 21:36:57,915 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 21:36:57,915 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 21:36:57,915 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 21:36:57,916 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 21:36:57,916 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 21:36:57,933 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2020-09-04 21:36:57,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-04 21:36:57,946 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:36:57,947 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] [2020-09-04 21:36:57,947 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:36:57,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:36:57,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1694901136, now seen corresponding path program 1 times [2020-09-04 21:36:57,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:36:57,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306605347] [2020-09-04 21:36:57,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:36:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:36:58,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:36:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:36:58,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-04 21:36:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:36:58,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 21:36:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:36:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:36:58,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306605347] [2020-09-04 21:36:58,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:36:58,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 21:36:58,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284011709] [2020-09-04 21:36:58,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 21:36:58,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:36:58,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 21:36:58,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 21:36:58,313 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 4 states. [2020-09-04 21:36:58,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:36:58,584 INFO L93 Difference]: Finished difference Result 152 states and 175 transitions. [2020-09-04 21:36:58,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 21:36:58,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-09-04 21:36:58,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:36:58,599 INFO L225 Difference]: With dead ends: 152 [2020-09-04 21:36:58,599 INFO L226 Difference]: Without dead ends: 76 [2020-09-04 21:36:58,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 21:36:58,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-04 21:36:58,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-09-04 21:36:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-04 21:36:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-09-04 21:36:58,670 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 35 [2020-09-04 21:36:58,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:36:58,671 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-09-04 21:36:58,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 21:36:58,671 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-09-04 21:36:58,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-04 21:36:58,674 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:36:58,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:36:58,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 21:36:58,676 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:36:58,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:36:58,677 INFO L82 PathProgramCache]: Analyzing trace with hash -331067037, now seen corresponding path program 1 times [2020-09-04 21:36:58,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:36:58,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21174930] [2020-09-04 21:36:58,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:36:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 21:36:58,830 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 21:36:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 21:36:58,881 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 21:36:58,919 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 21:36:58,920 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 21:36:58,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 21:36:58,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 09:36:58 BoogieIcfgContainer [2020-09-04 21:36:58,971 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 21:36:58,975 INFO L168 Benchmark]: Toolchain (without parser) took 2138.42 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 104.5 MB in the beginning and 98.7 MB in the end (delta: 5.8 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. [2020-09-04 21:36:58,976 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 147.3 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 21:36:58,977 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.37 ms. Allocated memory is still 147.3 MB. Free memory was 104.3 MB in the beginning and 93.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-09-04 21:36:58,978 INFO L168 Benchmark]: Boogie Preprocessor took 137.04 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 93.4 MB in the beginning and 180.2 MB in the end (delta: -86.9 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-09-04 21:36:58,979 INFO L168 Benchmark]: RCFGBuilder took 517.27 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 156.9 MB in the end (delta: 23.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. [2020-09-04 21:36:58,980 INFO L168 Benchmark]: TraceAbstraction took 1139.76 ms. Allocated memory is still 202.9 MB. Free memory was 156.3 MB in the beginning and 98.7 MB in the end (delta: 57.6 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. [2020-09-04 21:36:58,984 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 147.3 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 339.37 ms. Allocated memory is still 147.3 MB. Free memory was 104.3 MB in the beginning and 93.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 137.04 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 93.4 MB in the beginning and 180.2 MB in the end (delta: -86.9 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 517.27 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 156.9 MB in the end (delta: 23.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1139.76 ms. Allocated memory is still 202.9 MB. Free memory was 156.3 MB in the beginning and 98.7 MB in the end (delta: 57.6 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 67]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryArithmeticFLOAToperation at line 62, overapproximation of bitwiseAnd at line 51. Possible FailurePath: [L62] float x = 1.0f / 0.0f; [L63] CALL, EXPR trunc_float(x) VAL [\old(x)=8589934596] [L13] __int32_t signbit, w, exponent_less_127; VAL [\old(x)=8589934596, x=8589934596] [L15] ieee_float_shape_type gf_u; VAL [\old(x)=8589934596, gf_u={3:0}, x=8589934596] [L16] gf_u.value = (x) VAL [\old(x)=8589934596, gf_u={3:0}, x=8589934596] [L17] EXPR gf_u.word VAL [\old(x)=8589934596, gf_u={3:0}, gf_u.word=8589934590, x=8589934596] [L17] (w) = gf_u.word VAL [(w) = gf_u.word=8589934597, \old(x)=8589934596, gf_u={3:0}, gf_u.word=8589934590, w=-2, x=8589934596] [L19] signbit = w & 0x80000000 VAL [\old(x)=8589934596, signbit=-3, w=-2, x=8589934596] [L20] exponent_less_127 = ((w & 0x7f800000) >> 23) - 127 VAL [\old(x)=8589934596, exponent_less_127=23, signbit=-3, w=-2, x=8589934596] [L21] COND FALSE !(exponent_less_127 < 23) VAL [\old(x)=8589934596, exponent_less_127=23, signbit=-3, w=-2, x=8589934596] [L37] COND FALSE !(exponent_less_127 == 255) VAL [\old(x)=8589934596, exponent_less_127=23, signbit=-3, w=-2, x=8589934596] [L40] return x; VAL [\old(x)=8589934596, \result=8589934596, exponent_less_127=23, signbit=-3, w=-2, x=8589934596] [L63] RET, EXPR trunc_float(x) VAL [trunc_float(x)=8589934596, x=8589934596] [L63] float res = trunc_float(x); VAL [res=8589934596, trunc_float(x)=8589934596, x=8589934596] [L66] CALL, EXPR isinf_float(res) VAL [\old(x)=8589934596] [L45] __int32_t ix; VAL [\old(x)=8589934596, x=8589934596] [L47] ieee_float_shape_type gf_u; VAL [\old(x)=8589934596, gf_u={2:0}, x=8589934596] [L48] gf_u.value = (x) VAL [\old(x)=8589934596, gf_u={2:0}, x=8589934596] [L49] EXPR gf_u.word VAL [\old(x)=8589934596, gf_u={2:0}, gf_u.word=4294967295, x=8589934596] [L49] (ix) = gf_u.word VAL [(ix) = gf_u.word=8589934594, \old(x)=8589934596, gf_u={2:0}, gf_u.word=4294967295, ix=-1, x=8589934596] [L51] ix &= 0x7fffffff VAL [\old(x)=8589934596, x=8589934596] [L52] return ((ix) == 0x7f800000L); VAL [\old(x)=8589934596, \result=0, ix=0, x=8589934596] [L66] RET, EXPR isinf_float(res) VAL [isinf_float(res)=0, res=8589934596, x=8589934596] [L66] COND TRUE !isinf_float(res) VAL [isinf_float(res)=0, res=8589934596, x=8589934596] [L67] __VERIFIER_error() VAL [res=8589934596, x=8589934596] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 83 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 81 SDtfs, 15 SDslu, 54 SDs, 0 SdLazy, 94 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred 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, 0.1s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 2278 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...