/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_1211a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:14:07,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:14:07,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:14:07,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:14:07,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:14:07,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:14:07,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:14:07,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:14:07,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:14:07,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:14:07,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:14:07,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:14:07,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:14:07,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:14:07,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:14:07,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:14:07,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:14:07,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:14:07,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:14:07,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:14:07,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:14:07,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:14:07,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:14:07,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:14:07,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 16:14:07,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 16:14:07,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 16:14:07,601 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 16:14:07,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 16:14:07,605 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 16:14:07,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 16:14:07,606 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 16:14:07,607 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 16:14:07,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 16:14:07,610 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 16:14:07,610 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 16:14:07,611 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 16:14:07,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 16:14:07,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:14:07,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:14:07,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:14:07,615 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 16:14:07,664 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:14:07,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:14:07,666 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:14:07,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:14:07,669 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:14:07,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:14:07,669 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:14:07,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:14:07,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:14:07,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:14:07,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:14:07,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:14:07,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:14:07,671 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:14:07,671 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:14:07,671 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:14:07,671 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:14:07,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:14:07,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:14:07,675 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:14:07,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:14:07,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:14:07,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:14:07,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:14:07,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:14:07,676 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:14:07,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:14:07,676 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:14:07,677 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:14:07,679 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 16:14:07,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:14:08,006 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:14:08,010 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:14:08,011 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:14:08,012 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:14:08,012 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1211a.c [2020-08-18 16:14:08,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/160c1780b/810047979dd64e4dbff06844a71539e3/FLAG5b3ae727d [2020-08-18 16:14:08,591 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:14:08,592 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1211a.c [2020-08-18 16:14:08,601 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/160c1780b/810047979dd64e4dbff06844a71539e3/FLAG5b3ae727d [2020-08-18 16:14:08,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/160c1780b/810047979dd64e4dbff06844a71539e3 [2020-08-18 16:14:08,937 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:14:08,938 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:14:08,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:14:08,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:14:08,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:14:08,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:14:08" (1/1) ... [2020-08-18 16:14:08,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7decd891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:08, skipping insertion in model container [2020-08-18 16:14:08,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:14:08" (1/1) ... [2020-08-18 16:14:08,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:14:08,976 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:14:09,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:14:09,227 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:14:09,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:14:09,359 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:14:09,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:09 WrapperNode [2020-08-18 16:14:09,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:14:09,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:14:09,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:14:09,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:14:09,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:09" (1/1) ... [2020-08-18 16:14:09,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:09" (1/1) ... [2020-08-18 16:14:09,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:09" (1/1) ... [2020-08-18 16:14:09,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:09" (1/1) ... [2020-08-18 16:14:09,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:09" (1/1) ... [2020-08-18 16:14:09,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:09" (1/1) ... [2020-08-18 16:14:09,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:09" (1/1) ... [2020-08-18 16:14:09,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:14:09,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:14:09,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:14:09,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:14:09,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:09" (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 16:14:09,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:14:09,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:14:09,490 INFO L138 BoogieDeclarations]: Found implementation of procedure modf_float [2020-08-18 16:14:09,491 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-18 16:14:09,491 INFO L138 BoogieDeclarations]: Found implementation of procedure isinf_float [2020-08-18 16:14:09,491 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:14:09,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:14:09,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-18 16:14:09,492 INFO L130 BoogieDeclarations]: Found specification of procedure modf_float [2020-08-18 16:14:09,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 16:14:09,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 16:14:09,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 16:14:09,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:14:09,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 16:14:09,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 16:14:09,494 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-18 16:14:09,494 INFO L130 BoogieDeclarations]: Found specification of procedure isinf_float [2020-08-18 16:14:09,495 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:14:09,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-08-18 16:14:09,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:14:09,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:14:09,971 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:14:09,972 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-08-18 16:14:09,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:14:09 BoogieIcfgContainer [2020-08-18 16:14:09,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:14:09,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:14:09,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:14:09,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:14:09,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:14:08" (1/3) ... [2020-08-18 16:14:09,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ad12d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:14:09, skipping insertion in model container [2020-08-18 16:14:09,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:09" (2/3) ... [2020-08-18 16:14:09,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ad12d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:14:09, skipping insertion in model container [2020-08-18 16:14:09,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:14:09" (3/3) ... [2020-08-18 16:14:09,986 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1211a.c [2020-08-18 16:14:09,997 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:14:10,005 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:14:10,020 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:14:10,045 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:14:10,045 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:14:10,045 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:14:10,045 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:14:10,046 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:14:10,046 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:14:10,046 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:14:10,046 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:14:10,065 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-08-18 16:14:10,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 16:14:10,072 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:14:10,073 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] [2020-08-18 16:14:10,074 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:14:10,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:14:10,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1328912444, now seen corresponding path program 1 times [2020-08-18 16:14:10,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:14:10,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455207677] [2020-08-18 16:14:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:14:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:10,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:14:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:10,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:14:10,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:10,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 16:14:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:10,325 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 16:14:10,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455207677] [2020-08-18 16:14:10,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:14:10,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 16:14:10,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651997451] [2020-08-18 16:14:10,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 16:14:10,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:14:10,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 16:14:10,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:14:10,354 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 4 states. [2020-08-18 16:14:10,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:14:10,608 INFO L93 Difference]: Finished difference Result 110 states and 158 transitions. [2020-08-18 16:14:10,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 16:14:10,610 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-08-18 16:14:10,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:14:10,622 INFO L225 Difference]: With dead ends: 110 [2020-08-18 16:14:10,622 INFO L226 Difference]: Without dead ends: 55 [2020-08-18 16:14:10,626 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 [2020-08-18 16:14:10,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-18 16:14:10,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-18 16:14:10,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 16:14:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-08-18 16:14:10,678 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 27 [2020-08-18 16:14:10,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:14:10,678 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-08-18 16:14:10,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 16:14:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-08-18 16:14:10,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 16:14:10,681 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:14:10,681 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] [2020-08-18 16:14:10,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:14:10,682 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:14:10,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:14:10,682 INFO L82 PathProgramCache]: Analyzing trace with hash -2017954314, now seen corresponding path program 1 times [2020-08-18 16:14:10,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:14:10,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964240961] [2020-08-18 16:14:10,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:14:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:10,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:14:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:10,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:14:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:10,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 16:14:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:10,862 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 16:14:10,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964240961] [2020-08-18 16:14:10,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:14:10,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:14:10,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533026510] [2020-08-18 16:14:10,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:14:10,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:14:10,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:14:10,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:14:10,866 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 5 states. [2020-08-18 16:14:11,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:14:11,053 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-08-18 16:14:11,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:14:11,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-18 16:14:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:14:11,056 INFO L225 Difference]: With dead ends: 58 [2020-08-18 16:14:11,056 INFO L226 Difference]: Without dead ends: 55 [2020-08-18 16:14:11,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:14:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-18 16:14:11,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-18 16:14:11,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 16:14:11,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-08-18 16:14:11,068 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 30 [2020-08-18 16:14:11,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:14:11,069 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-08-18 16:14:11,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:14:11,069 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-08-18 16:14:11,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-18 16:14:11,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:14:11,072 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] [2020-08-18 16:14:11,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:14:11,073 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:14:11,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:14:11,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2060718957, now seen corresponding path program 1 times [2020-08-18 16:14:11,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:14:11,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509021953] [2020-08-18 16:14:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:14:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:14:11,204 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:14:11,204 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:14:11,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:14:11,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:14:11 BoogieIcfgContainer [2020-08-18 16:14:11,231 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:14:11,234 INFO L168 Benchmark]: Toolchain (without parser) took 2294.55 ms. Allocated memory was 140.0 MB in the beginning and 235.4 MB in the end (delta: 95.4 MB). Free memory was 101.5 MB in the beginning and 169.9 MB in the end (delta: -68.4 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. [2020-08-18 16:14:11,235 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:14:11,236 INFO L168 Benchmark]: CACSL2BoogieTranslator took 421.06 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 101.3 MB in the beginning and 178.8 MB in the end (delta: -77.5 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. [2020-08-18 16:14:11,236 INFO L168 Benchmark]: Boogie Preprocessor took 60.27 ms. Allocated memory is still 201.9 MB. Free memory was 178.8 MB in the beginning and 176.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-08-18 16:14:11,237 INFO L168 Benchmark]: RCFGBuilder took 555.58 ms. Allocated memory is still 201.9 MB. Free memory was 176.3 MB in the beginning and 147.6 MB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. [2020-08-18 16:14:11,238 INFO L168 Benchmark]: TraceAbstraction took 1252.95 ms. Allocated memory was 201.9 MB in the beginning and 235.4 MB in the end (delta: 33.6 MB). Free memory was 147.0 MB in the beginning and 169.9 MB in the end (delta: -22.9 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-18 16:14:11,242 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 421.06 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 101.3 MB in the beginning and 178.8 MB in the end (delta: -77.5 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 60.27 ms. Allocated memory is still 201.9 MB. Free memory was 178.8 MB in the beginning and 176.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 555.58 ms. Allocated memory is still 201.9 MB. Free memory was 176.3 MB in the beginning and 147.6 MB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1252.95 ms. Allocated memory was 201.9 MB in the beginning and 235.4 MB in the end (delta: 33.6 MB). Free memory was 147.0 MB in the beginning and 169.9 MB in the end (delta: -22.9 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 110]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 109, overapproximation of someBinaryArithmeticFLOAToperation at line 104, overapproximation of bitwiseAnd at line 93. Possible FailurePath: [L12] static const float one_modf = 1.0; [L104] float x = 1.0f / 0.0f; [L105] float iptr = __VERIFIER_nondet_float(); [L106] CALL, EXPR modf_float(x, &iptr) [L15] __int32_t i0, j0; [L16] __uint32_t i; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (i0) = gf_u.word [L22] j0 = ((i0 >> 23) & 0xff) - 0x7f [L23] COND TRUE j0 < 23 [L24] COND TRUE j0 < 0 [L26] ieee_float_shape_type sf_u; [L27] sf_u.word = (i0 & 0x80000000) [L28] EXPR sf_u.value [L28] (*iptr) = sf_u.value [L30] return x; [L106] RET, EXPR modf_float(x, &iptr) [L106] float res = modf_float(x, &iptr); [L109] EXPR \read(iptr) [L109] CALL, EXPR isinf_float(iptr) [L87] __int32_t ix; [L89] ieee_float_shape_type gf_u; [L90] gf_u.value = (x) [L91] EXPR gf_u.word [L91] (ix) = gf_u.word [L93] ix &= 0x7fffffff [L94] return ((ix) == 0x7f800000L); [L109] RET, EXPR isinf_float(iptr) [L109] isinf_float(iptr) && !(res == 0.0f && __signbit_float(res) == 0) [L109] EXPR res == 0.0f && __signbit_float(res) == 0 [L109] isinf_float(iptr) && !(res == 0.0f && __signbit_float(res) == 0) [L109] COND TRUE isinf_float(iptr) && !(res == 0.0f && __signbit_float(res) == 0) [L110] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 100 SDtfs, 62 SDslu, 44 SDs, 0 SdLazy, 180 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 89 NumberOfCodeBlocks, 89 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 3526 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...