/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 CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1092a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:12:16,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:12:16,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:12:16,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:12:16,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:12:16,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:12:16,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:12:16,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:12:16,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:12:16,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:12:16,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:12:16,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:12:16,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:12:16,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:12:16,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:12:16,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:12:16,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:12:16,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:12:16,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:12:16,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:12:16,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:12:16,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:12:16,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:12:16,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:12:16,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:12:16,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:12:16,623 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:12:16,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:12:16,624 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 [2020-07-19 21:12:16,639 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:12:16,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:12:16,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:12:16,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:12:16,641 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:12:16,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:12:16,641 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:12:16,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:12:16,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:12:16,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:12:16,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:12:16,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:12:16,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:12:16,642 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:12:16,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:12:16,643 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:12:16,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:12:16,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:12:16,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:12:16,644 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:12:16,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:12:16,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:12:16,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:12:16,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:12:16,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:12:16,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:12:16,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:12:16,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:12:16,645 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:12:16,646 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:12:16,913 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:12:16,926 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:12:16,930 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:12:16,931 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:12:16,931 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:12:16,932 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1092a.c [2020-07-19 21:12:16,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45e55fee1/f1ec8c81935643078cb5e8898f2ba15b/FLAGda0acc243 [2020-07-19 21:12:17,447 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:12:17,448 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1092a.c [2020-07-19 21:12:17,457 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45e55fee1/f1ec8c81935643078cb5e8898f2ba15b/FLAGda0acc243 [2020-07-19 21:12:17,827 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45e55fee1/f1ec8c81935643078cb5e8898f2ba15b [2020-07-19 21:12:17,841 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:12:17,844 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:12:17,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:12:17,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:12:17,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:12:17,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:12:17" (1/1) ... [2020-07-19 21:12:17,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44193db1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:17, skipping insertion in model container [2020-07-19 21:12:17,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:12:17" (1/1) ... [2020-07-19 21:12:17,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:12:17,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:12:18,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:12:18,084 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:12:18,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:12:18,214 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:12:18,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:18 WrapperNode [2020-07-19 21:12:18,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:12:18,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:12:18,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:12:18,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:12:18,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:18" (1/1) ... [2020-07-19 21:12:18,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:18" (1/1) ... [2020-07-19 21:12:18,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:18" (1/1) ... [2020-07-19 21:12:18,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:18" (1/1) ... [2020-07-19 21:12:18,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:18" (1/1) ... [2020-07-19 21:12:18,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:18" (1/1) ... [2020-07-19 21:12:18,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:18" (1/1) ... [2020-07-19 21:12:18,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:12:18,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:12:18,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:12:18,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:12:18,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:18" (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 [2020-07-19 21:12:18,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:12:18,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:12:18,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ceil_float [2020-07-19 21:12:18,370 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-19 21:12:18,370 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:12:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:12:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure ceil_float [2020-07-19 21:12:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-19 21:12:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-19 21:12:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 21:12:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 21:12:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 21:12:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-19 21:12:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-19 21:12:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:12:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:12:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:12:18,737 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:12:18,737 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-19 21:12:18,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:12:18 BoogieIcfgContainer [2020-07-19 21:12:18,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:12:18,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:12:18,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:12:18,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:12:18,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:12:17" (1/3) ... [2020-07-19 21:12:18,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ed24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:12:18, skipping insertion in model container [2020-07-19 21:12:18,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:18" (2/3) ... [2020-07-19 21:12:18,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ed24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:12:18, skipping insertion in model container [2020-07-19 21:12:18,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:12:18" (3/3) ... [2020-07-19 21:12:18,749 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1092a.c [2020-07-19 21:12:18,758 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:12:18,765 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:12:18,778 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:12:18,802 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:12:18,802 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:12:18,802 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:12:18,802 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:12:18,803 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:12:18,803 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:12:18,803 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:12:18,803 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:12:18,820 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-07-19 21:12:18,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-19 21:12:18,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:18,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:18,827 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:18,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:18,833 INFO L82 PathProgramCache]: Analyzing trace with hash 263185431, now seen corresponding path program 1 times [2020-07-19 21:12:18,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:18,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342897002] [2020-07-19 21:12:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a83e288 [2020-07-19 21:12:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:19,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:12:19,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342897002] [2020-07-19 21:12:19,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:12:19,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 21:12:19,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294194220] [2020-07-19 21:12:19,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 21:12:19,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:19,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 21:12:19,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 21:12:19,076 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 4 states. [2020-07-19 21:12:19,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:19,321 INFO L93 Difference]: Finished difference Result 78 states and 111 transitions. [2020-07-19 21:12:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 21:12:19,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-07-19 21:12:19,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:19,332 INFO L225 Difference]: With dead ends: 78 [2020-07-19 21:12:19,333 INFO L226 Difference]: Without dead ends: 39 [2020-07-19 21:12:19,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:12:19,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-19 21:12:19,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-19 21:12:19,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-19 21:12:19,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-07-19 21:12:19,380 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 18 [2020-07-19 21:12:19,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:19,381 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-07-19 21:12:19,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 21:12:19,381 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-07-19 21:12:19,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-19 21:12:19,383 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:19,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:19,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:12:19,384 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:19,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:19,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1491196875, now seen corresponding path program 1 times [2020-07-19 21:12:19,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:19,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567454111] [2020-07-19 21:12:19,385 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a83e288 [2020-07-19 21:12:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 21:12:19,477 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 21:12:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 21:12:19,540 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 21:12:19,591 INFO L174 FreeRefinementEngine]: Strategy CAMEL_NO_AM found a feasible trace [2020-07-19 21:12:19,592 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 21:12:19,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 21:12:19,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:12:19 BoogieIcfgContainer [2020-07-19 21:12:19,643 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:12:19,648 INFO L168 Benchmark]: Toolchain (without parser) took 1802.59 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 106.0 MB in the end (delta: -3.9 MB). Peak memory consumption was 59.5 MB. Max. memory is 7.1 GB. [2020-07-19 21:12:19,649 INFO L168 Benchmark]: CDTParser took 0.22 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: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-19 21:12:19,650 INFO L168 Benchmark]: CACSL2BoogieTranslator took 369.88 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 101.8 MB in the beginning and 180.2 MB in the end (delta: -78.4 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-07-19 21:12:19,652 INFO L168 Benchmark]: Boogie Preprocessor took 82.60 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. [2020-07-19 21:12:19,653 INFO L168 Benchmark]: RCFGBuilder took 442.59 ms. Allocated memory is still 201.3 MB. Free memory was 177.8 MB in the beginning and 157.1 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-07-19 21:12:19,655 INFO L168 Benchmark]: TraceAbstraction took 901.21 ms. Allocated memory is still 201.3 MB. Free memory was 156.5 MB in the beginning and 106.0 MB in the end (delta: 50.5 MB). Peak memory consumption was 50.5 MB. Max. memory is 7.1 GB. [2020-07-19 21:12:19,664 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 369.88 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 101.8 MB in the beginning and 180.2 MB in the end (delta: -78.4 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 82.60 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 442.59 ms. Allocated memory is still 201.3 MB. Free memory was 177.8 MB in the beginning and 157.1 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 901.21 ms. Allocated memory is still 201.3 MB. Free memory was 156.5 MB in the beginning and 106.0 MB in the end (delta: 50.5 MB). Peak memory consumption was 50.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 81]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 80, overapproximation of bitwiseAnd at line 21, overapproximation of someUnaryFLOAToperation at line 76, overapproximation of someBinaryArithmeticFLOAToperation at line 44. Possible FailurePath: [L11] static const float huge_ceil = 1.0e30; VAL [\old(huge_ceil)=1000000000000000000000000000004, huge_ceil=1000000000000000000000000000000] [L76] float x = -0.0f; VAL [huge_ceil=1000000000000000000000000000000] [L77] CALL, EXPR ceil_float(x) VAL [\old(x)=1000000000000000000000000000005, huge_ceil=1000000000000000000000000000000] [L14] __int32_t i0, j0; [L15] __uint32_t i, ix; VAL [\old(x)=1000000000000000000000000000005, huge_ceil=1000000000000000000000000000000, x=1000000000000000000000000000005] [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (i0) = gf_u.word [L21] ix = (i0 & 0x7fffffff) [L22] j0 = (ix >> 23) - 0x7f VAL [\old(x)=1000000000000000000000000000005, huge_ceil=1000000000000000000000000000000, i=18014396353609728, i0=0, j0=2147483264, x=1000000000000000000000000000005] [L23] COND FALSE !(j0 < 23) VAL [\old(x)=1000000000000000000000000000005, huge_ceil=1000000000000000000000000000000, i=18014396353609728, i0=0, j0=2147483264, x=1000000000000000000000000000005] [L43] COND TRUE !((ix) < 0x7f800000L) [L44] return x + x; VAL [\old(x)=1000000000000000000000000000005, huge_ceil=1000000000000000000000000000000, i=18014396353609728, i0=0, j0=2147483264, x=1000000000000000000000000000005] [L77] RET, EXPR ceil_float(x) VAL [ceil_float(x)=1000000000000000000000000000002, huge_ceil=1000000000000000000000000000000, x=1000000000000000000000000000005] [L77] float res = ceil_float(x); [L80] EXPR res == -0.0f && __signbit_float(res) == 1 VAL [huge_ceil=1000000000000000000000000000000, res=1000000000000000000000000000002, res == -0.0f && __signbit_float(res) == 1=0, x=1000000000000000000000000000005] [L80] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L81] __VERIFIER_error() VAL [huge_ceil=1000000000000000000000000000000, res=1000000000000000000000000000002, x=1000000000000000000000000000005] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 46 SDtfs, 41 SDslu, 5 SDs, 0 SdLazy, 51 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred 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, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 697 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...