/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1131b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 11:17:46,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:17:46,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:17:46,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:17:46,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:17:46,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:17:46,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:17:46,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:17:46,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:17:46,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:17:46,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:17:46,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:17:46,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:17:46,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:17:46,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:17:46,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:17:46,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:17:46,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:17:46,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:17:46,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:17:46,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:17:46,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:17:46,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:17:46,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:17:46,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 11:17:46,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 11:17:46,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 11:17:46,427 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 11:17:46,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 11:17:46,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 11:17:46,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 11:17:46,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 11:17:46,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 11:17:46,433 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 11:17:46,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 11:17:46,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 11:17:46,435 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 11:17:46,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 11:17:46,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:17:46,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:17:46,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:17:46,439 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 11:17:46,494 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:17:46,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:17:46,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:17:46,496 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:17:46,496 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:17:46,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:17:46,496 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:17:46,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:17:46,498 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:17:46,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:17:46,499 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:17:46,499 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:17:46,499 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:17:46,499 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:17:46,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:17:46,501 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:17:46,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:17:46,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:17:46,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:17:46,502 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:17:46,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:17:46,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:17:46,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:17:46,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:17:46,503 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:17:46,503 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:17:46,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:17:46,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:17:46,504 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:17:46,504 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES 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: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 11:17:46,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:17:46,852 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:17:46,856 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:17:46,858 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:17:46,858 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:17:46,859 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1131b.c [2020-08-18 11:17:46,935 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9ccf34e55/3e4df5532a93424690eda80b4a697192/FLAGa327853ed [2020-08-18 11:17:47,417 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:17:47,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1131b.c [2020-08-18 11:17:47,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9ccf34e55/3e4df5532a93424690eda80b4a697192/FLAGa327853ed [2020-08-18 11:17:47,913 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9ccf34e55/3e4df5532a93424690eda80b4a697192 [2020-08-18 11:17:47,923 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:17:47,925 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:17:47,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:17:47,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:17:47,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:17:47,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:17:47" (1/1) ... [2020-08-18 11:17:47,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fe0b327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:47, skipping insertion in model container [2020-08-18 11:17:47,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:17:47" (1/1) ... [2020-08-18 11:17:47,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:17:47,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:17:48,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:17:48,188 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:17:48,314 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:17:48,337 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:17:48,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:48 WrapperNode [2020-08-18 11:17:48,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:17:48,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:17:48,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:17:48,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:17:48,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:48" (1/1) ... [2020-08-18 11:17:48,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:48" (1/1) ... [2020-08-18 11:17:48,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:48" (1/1) ... [2020-08-18 11:17:48,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:48" (1/1) ... [2020-08-18 11:17:48,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:48" (1/1) ... [2020-08-18 11:17:48,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:48" (1/1) ... [2020-08-18 11:17:48,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:48" (1/1) ... [2020-08-18 11:17:48,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:17:48,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:17:48,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:17:48,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:17:48,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:48" (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 [2020-08-18 11:17:48,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:17:48,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:17:48,474 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-08-18 11:17:48,474 INFO L138 BoogieDeclarations]: Found implementation of procedure isfinite_float [2020-08-18 11:17:48,474 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:17:48,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:17:48,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-18 11:17:48,475 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-08-18 11:17:48,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 11:17:48,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 11:17:48,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 11:17:48,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 11:17:48,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 11:17:48,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 11:17:48,476 INFO L130 BoogieDeclarations]: Found specification of procedure isfinite_float [2020-08-18 11:17:48,476 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:17:48,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:17:48,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-08-18 11:17:48,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:17:48,955 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:17:48,955 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-08-18 11:17:48,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:17:48 BoogieIcfgContainer [2020-08-18 11:17:48,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:17:48,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:17:48,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:17:48,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:17:48,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:17:47" (1/3) ... [2020-08-18 11:17:48,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62beb69e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:17:48, skipping insertion in model container [2020-08-18 11:17:48,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:48" (2/3) ... [2020-08-18 11:17:48,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62beb69e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:17:48, skipping insertion in model container [2020-08-18 11:17:48,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:17:48" (3/3) ... [2020-08-18 11:17:48,969 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1131b.c [2020-08-18 11:17:48,978 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:17:48,986 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:17:49,000 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:17:49,024 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:17:49,024 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:17:49,024 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:17:49,024 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:17:49,025 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:17:49,025 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:17:49,025 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:17:49,025 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:17:49,045 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-08-18 11:17:49,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 11:17:49,052 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:17:49,053 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] [2020-08-18 11:17:49,053 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:17:49,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:17:49,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1081724134, now seen corresponding path program 1 times [2020-08-18 11:17:49,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:17:49,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384760485] [2020-08-18 11:17:49,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:17:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:17:49,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:17:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:17:49,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:17:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:17:49,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 11:17:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:17:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:17:49,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384760485] [2020-08-18 11:17:49,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:17:49,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:17:49,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112645555] [2020-08-18 11:17:49,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 11:17:49,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:17:49,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 11:17:49,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:17:49,356 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 4 states. [2020-08-18 11:17:49,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:17:49,628 INFO L93 Difference]: Finished difference Result 112 states and 175 transitions. [2020-08-18 11:17:49,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 11:17:49,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-18 11:17:49,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:17:49,642 INFO L225 Difference]: With dead ends: 112 [2020-08-18 11:17:49,643 INFO L226 Difference]: Without dead ends: 55 [2020-08-18 11:17:49,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:17:49,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-18 11:17:49,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-18 11:17:49,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 11:17:49,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2020-08-18 11:17:49,699 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 25 [2020-08-18 11:17:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:17:49,700 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2020-08-18 11:17:49,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 11:17:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2020-08-18 11:17:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 11:17:49,702 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:17:49,702 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] [2020-08-18 11:17:49,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:17:49,703 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:17:49,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:17:49,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1695884658, now seen corresponding path program 1 times [2020-08-18 11:17:49,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:17:49,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979167471] [2020-08-18 11:17:49,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:17:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 11:17:49,860 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 11:17:49,861 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 11:17:49,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:17:49,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:17:49 BoogieIcfgContainer [2020-08-18 11:17:49,904 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 11:17:49,907 INFO L168 Benchmark]: Toolchain (without parser) took 1981.17 ms. Allocated memory was 138.9 MB in the beginning and 199.2 MB in the end (delta: 60.3 MB). Free memory was 101.7 MB in the beginning and 90.1 MB in the end (delta: 11.6 MB). Peak memory consumption was 71.9 MB. Max. memory is 7.1 GB. [2020-08-18 11:17:49,908 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-18 11:17:49,909 INFO L168 Benchmark]: CACSL2BoogieTranslator took 411.99 ms. Allocated memory was 138.9 MB in the beginning and 199.2 MB in the end (delta: 60.3 MB). Free memory was 101.3 MB in the beginning and 175.7 MB in the end (delta: -74.4 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. [2020-08-18 11:17:49,910 INFO L168 Benchmark]: Boogie Preprocessor took 77.45 ms. Allocated memory is still 199.2 MB. Free memory was 175.7 MB in the beginning and 172.5 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2020-08-18 11:17:49,911 INFO L168 Benchmark]: RCFGBuilder took 544.19 ms. Allocated memory is still 199.2 MB. Free memory was 172.5 MB in the beginning and 144.8 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. [2020-08-18 11:17:49,912 INFO L168 Benchmark]: TraceAbstraction took 942.37 ms. Allocated memory is still 199.2 MB. Free memory was 143.9 MB in the beginning and 90.1 MB in the end (delta: 53.7 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. [2020-08-18 11:17:49,916 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 411.99 ms. Allocated memory was 138.9 MB in the beginning and 199.2 MB in the end (delta: 60.3 MB). Free memory was 101.3 MB in the beginning and 175.7 MB in the end (delta: -74.4 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 77.45 ms. Allocated memory is still 199.2 MB. Free memory was 175.7 MB in the beginning and 172.5 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 544.19 ms. Allocated memory is still 199.2 MB. Free memory was 172.5 MB in the beginning and 144.8 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 942.37 ms. Allocated memory is still 199.2 MB. Free memory was 143.9 MB in the beginning and 90.1 MB in the end (delta: 53.7 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 135]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 134, overapproximation of someUnaryDOUBLEoperation at line 14, overapproximation of bitwiseAnd at line 30, overapproximation of someBinaryArithmeticFLOAToperation at line 35, overapproximation of bitwiseXor at line 31. Possible FailurePath: [L12-L15] static const float one_fmod = 1.0, Zero_fmod[] = { 0.0, -0.0, }; [L126] float x = __VERIFIER_nondet_float(); [L127] float y = -1.0f / 0.0f; [L129] CALL isfinite_float(x) [L109] __int32_t ix; [L111] ieee_float_shape_type gf_u; [L112] gf_u.value = (x) [L113] EXPR gf_u.word [L113] (ix) = gf_u.word [L115] ix &= 0x7fffffff [L116] return (((ix) < 0x7f800000L)); [L129] RET isfinite_float(x) [L129] COND TRUE isfinite_float(x) [L131] CALL, EXPR fmod_float(x, y) [L18] __int32_t n, hx, hy, hz, ix, iy, sx, i; [L21] ieee_float_shape_type gf_u; [L22] gf_u.value = (x) [L23] EXPR gf_u.word [L23] (hx) = gf_u.word [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (y) [L28] EXPR gf_u.word [L28] (hy) = gf_u.word [L30] sx = hx & 0x80000000 [L31] hx ^= sx [L32] hy &= 0x7fffffff [L34] COND TRUE ((hy) == 0) || !((hx) < 0x7f800000L) || ((hy) > 0x7f800000L) [L35] return (x * y) / (x * y); [L131] RET, EXPR fmod_float(x, y) [L131] float res = fmod_float(x, y); [L134] COND TRUE res != x [L135] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 60 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 73 SDtfs, 6 SDslu, 63 SDs, 0 SdLazy, 78 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, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred 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, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 1656 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...