/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/double_req_bl_1072a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 10:45:02,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 10:45:02,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 10:45:02,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 10:45:02,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:45:02,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:45:02,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:45:02,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:45:02,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:45:02,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:45:02,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:45:02,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:45:02,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:45:02,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:45:02,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:45:02,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:45:02,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:45:02,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:45:02,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:45:02,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:45:02,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:45:02,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:45:02,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:45:02,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:45:02,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:45:02,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:45:02,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:45:02,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:45:02,735 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 10:45:02,760 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:45:02,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:45:02,762 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:45:02,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:45:02,762 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:45:02,763 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:45:02,763 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:45:02,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:45:02,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:45:02,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:45:02,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:45:02,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:45:02,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:45:02,766 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:45:02,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:45:02,766 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:45:02,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:45:02,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:45:02,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:45:02,767 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:45:02,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:45:02,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:45:02,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:45:02,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:45:02,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:45:02,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:45:02,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:02,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:45:02,769 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:45:02,769 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 10:45:03,115 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:45:03,135 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:45:03,138 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:45:03,140 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:45:03,140 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:45:03,141 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1072a.c [2020-07-20 10:45:03,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea9b10027/116f5f09f431449d9053bf48237f83a2/FLAG6c55d72fe [2020-07-20 10:45:03,701 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:45:03,702 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1072a.c [2020-07-20 10:45:03,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea9b10027/116f5f09f431449d9053bf48237f83a2/FLAG6c55d72fe [2020-07-20 10:45:04,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea9b10027/116f5f09f431449d9053bf48237f83a2 [2020-07-20 10:45:04,050 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:45:04,053 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:45:04,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:04,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:45:04,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:45:04,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:04" (1/1) ... [2020-07-20 10:45:04,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@463718a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04, skipping insertion in model container [2020-07-20 10:45:04,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:04" (1/1) ... [2020-07-20 10:45:04,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:45:04,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:45:04,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:04,336 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:45:04,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:04,472 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:45:04,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04 WrapperNode [2020-07-20 10:45:04,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:04,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:45:04,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:45:04,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:45:04,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04" (1/1) ... [2020-07-20 10:45:04,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04" (1/1) ... [2020-07-20 10:45:04,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04" (1/1) ... [2020-07-20 10:45:04,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04" (1/1) ... [2020-07-20 10:45:04,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04" (1/1) ... [2020-07-20 10:45:04,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04" (1/1) ... [2020-07-20 10:45:04,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04" (1/1) ... [2020-07-20 10:45:04,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:45:04,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:45:04,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:45:04,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:45:04,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:45:04,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:45:04,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:45:04,585 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_double [2020-07-20 10:45:04,585 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_double [2020-07-20 10:45:04,585 INFO L138 BoogieDeclarations]: Found implementation of procedure isinf_double [2020-07-20 10:45:04,586 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:45:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:45:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_double [2020-07-20 10:45:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_double [2020-07-20 10:45:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 10:45:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 10:45:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 10:45:04,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 10:45:04,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 10:45:04,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 10:45:04,587 INFO L130 BoogieDeclarations]: Found specification of procedure isinf_double [2020-07-20 10:45:04,587 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:45:04,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:45:04,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:45:04,965 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:45:04,965 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-07-20 10:45:04,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:04 BoogieIcfgContainer [2020-07-20 10:45:04,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:45:04,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:45:04,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:45:04,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:45:04,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:45:04" (1/3) ... [2020-07-20 10:45:04,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c4c9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:04, skipping insertion in model container [2020-07-20 10:45:04,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04" (2/3) ... [2020-07-20 10:45:04,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c4c9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:04, skipping insertion in model container [2020-07-20 10:45:04,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:04" (3/3) ... [2020-07-20 10:45:04,980 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_1072a.c [2020-07-20 10:45:04,993 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:45:05,002 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:45:05,025 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:45:05,068 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:45:05,069 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:45:05,069 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:45:05,069 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:45:05,069 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:45:05,069 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:45:05,070 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:45:05,070 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:45:05,091 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-20 10:45:05,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 10:45:05,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:05,098 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] [2020-07-20 10:45:05,099 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:05,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:05,104 INFO L82 PathProgramCache]: Analyzing trace with hash -48260949, now seen corresponding path program 1 times [2020-07-20 10:45:05,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:05,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946604326] [2020-07-20 10:45:05,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:05,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 10:45:05,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 10:45:05,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:05,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946604326] [2020-07-20 10:45:05,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:05,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 10:45:05,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043328392] [2020-07-20 10:45:05,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 10:45:05,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:05,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 10:45:05,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 10:45:05,270 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2020-07-20 10:45:05,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:05,297 INFO L93 Difference]: Finished difference Result 72 states and 101 transitions. [2020-07-20 10:45:05,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 10:45:05,298 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2020-07-20 10:45:05,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:05,307 INFO L225 Difference]: With dead ends: 72 [2020-07-20 10:45:05,307 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 10:45:05,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 10:45:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 10:45:05,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 10:45:05,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 10:45:05,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-07-20 10:45:05,350 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 25 [2020-07-20 10:45:05,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:05,351 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-07-20 10:45:05,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 10:45:05,351 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-07-20 10:45:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 10:45:05,353 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:05,353 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] [2020-07-20 10:45:05,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:05,568 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:05,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:05,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1916763246, now seen corresponding path program 1 times [2020-07-20 10:45:05,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:05,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371646355] [2020-07-20 10:45:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:45:05,683 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:45:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:45:05,726 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:45:05,771 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 10:45:05,771 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 10:45:05,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:06,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:45:06 BoogieIcfgContainer [2020-07-20 10:45:06,033 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 10:45:06,036 INFO L168 Benchmark]: Toolchain (without parser) took 1982.99 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 102.4 MB in the beginning and 108.4 MB in the end (delta: -5.9 MB). Peak memory consumption was 57.5 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:06,037 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 10:45:06,039 INFO L168 Benchmark]: CACSL2BoogieTranslator took 419.01 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 102.0 MB in the beginning and 180.2 MB in the end (delta: -78.1 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:06,040 INFO L168 Benchmark]: Boogie Preprocessor took 47.76 ms. Allocated memory is still 201.3 MB. Free memory was 180.2 MB in the beginning and 177.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:06,041 INFO L168 Benchmark]: RCFGBuilder took 449.43 ms. Allocated memory is still 201.3 MB. Free memory was 177.8 MB in the beginning and 153.2 MB in the end (delta: 24.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:06,043 INFO L168 Benchmark]: TraceAbstraction took 1060.81 ms. Allocated memory is still 201.3 MB. Free memory was 152.5 MB in the beginning and 108.4 MB in the end (delta: 44.2 MB). Peak memory consumption was 44.2 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:06,049 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 419.01 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 102.0 MB in the beginning and 180.2 MB in the end (delta: -78.1 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 47.76 ms. Allocated memory is still 201.3 MB. Free memory was 180.2 MB in the beginning and 177.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 449.43 ms. Allocated memory is still 201.3 MB. Free memory was 177.8 MB in the beginning and 153.2 MB in the end (delta: 24.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1060.81 ms. Allocated memory is still 201.3 MB. Free memory was 152.5 MB in the beginning and 108.4 MB in the end (delta: 44.2 MB). Peak memory consumption was 44.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 89]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 72, overapproximation of someBinaryArithmeticDOUBLEoperation at line 49, overapproximation of bitwiseAnd at line 71. Possible FailurePath: [L84] double x = 1.0 / 0.0; [L85] CALL, EXPR trunc_double(x) VAL [\old(x)=0] [L18] int signbit; [L19] int msw; [L20] unsigned int lsw; [L21] int exponent_less_1023; VAL [\old(x)=0, x=0] [L23] ieee_double_shape_type ew_u; [L24] ew_u.value = (x) [L25] EXPR ew_u.parts.msw [L25] (msw) = ew_u.parts.msw [L26] EXPR ew_u.parts.lsw [L26] (lsw) = ew_u.parts.lsw [L28] signbit = msw & 0x80000000 [L29] exponent_less_1023 = ((msw & 0x7ff00000) >> 20) - 1023 VAL [\old(x)=0, exponent_less_1023=1024, lsw=11, msw=0, signbit=5853, x=0] [L30] COND FALSE !(exponent_less_1023 < 20) VAL [\old(x)=0, exponent_less_1023=1024, lsw=11, msw=0, signbit=5853, x=0] [L47] COND TRUE exponent_less_1023 > 51 VAL [\old(x)=0, exponent_less_1023=1024, lsw=11, msw=0, signbit=5853, x=0] [L48] COND TRUE exponent_less_1023 == 1024 [L49] return x + x; VAL [\old(x)=0, exponent_less_1023=1024, lsw=11, msw=0, signbit=5853, x=0] [L85] RET, EXPR trunc_double(x) VAL [trunc_double(x)=2, x=0] [L85] double res = trunc_double(x); [L88] CALL, EXPR isinf_double(res) VAL [\old(x)=2] [L64] __int32_t hx, lx; VAL [\old(x)=2, x=2] [L66] ieee_double_shape_type ew_u; [L67] ew_u.value = (x) [L68] EXPR ew_u.parts.msw [L68] (hx) = ew_u.parts.msw [L69] EXPR ew_u.parts.lsw [L69] (lx) = ew_u.parts.lsw [L71] hx &= 0x7fffffff [L72] hx |= (__uint32_t)(lx | (-lx)) >> 31 [L73] hx = 0x7ff00000 - hx [L74] return 1 - (int)((__uint32_t)(hx | (-hx)) >> 31); VAL [\old(x)=2, \result=0, hx=2146435072, lx=1142, x=2] [L88] RET, EXPR isinf_double(res) VAL [isinf_double(res)=0, res=2, x=0] [L88] COND TRUE !isinf_double(res) [L89] __VERIFIER_error() VAL [res=2, x=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 43 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 576 SizeOfPredicates, 0 NumberOfNonLiveVariables, 82 ConjunctsInSsa, 1 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...