/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/float_req_bl_1031.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 10:45:14,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 10:45:14,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 10:45:15,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 10:45:15,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:45:15,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:45:15,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:45:15,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:45:15,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:45:15,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:45:15,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:45:15,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:45:15,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:45:15,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:45:15,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:45:15,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:45:15,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:45:15,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:45:15,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:45:15,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:45:15,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:45:15,032 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:45:15,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:45:15,034 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:45:15,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:45:15,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:45:15,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:45:15,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:45:15,047 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 10:45:15,062 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:45:15,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:45:15,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:45:15,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:45:15,063 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:45:15,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:45:15,064 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:45:15,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:45:15,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:45:15,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:45:15,065 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:45:15,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:45:15,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:45:15,065 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:45:15,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:45:15,066 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:45:15,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:45:15,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:45:15,066 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:45:15,066 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:45:15,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:45:15,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:45:15,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:45:15,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:45:15,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:45:15,068 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:45:15,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:15,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:45:15,068 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:45:15,068 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 10:45:15,349 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:45:15,369 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:45:15,373 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:45:15,374 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:45:15,375 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:45:15,377 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1031.c [2020-07-20 10:45:15,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/500f4035e/9d7b65270a02475a9b143b34bb4c0c8b/FLAGab8ecb456 [2020-07-20 10:45:15,919 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:45:15,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1031.c [2020-07-20 10:45:15,927 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/500f4035e/9d7b65270a02475a9b143b34bb4c0c8b/FLAGab8ecb456 [2020-07-20 10:45:16,308 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/500f4035e/9d7b65270a02475a9b143b34bb4c0c8b [2020-07-20 10:45:16,318 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:45:16,321 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:45:16,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:16,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:45:16,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:45:16,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:16" (1/1) ... [2020-07-20 10:45:16,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b8a1156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:16, skipping insertion in model container [2020-07-20 10:45:16,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:16" (1/1) ... [2020-07-20 10:45:16,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:45:16,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:45:16,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:16,580 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:45:16,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:16,717 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:45:16,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:16 WrapperNode [2020-07-20 10:45:16,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:16,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:45:16,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:45:16,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:45:16,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:16" (1/1) ... [2020-07-20 10:45:16,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:16" (1/1) ... [2020-07-20 10:45:16,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:16" (1/1) ... [2020-07-20 10:45:16,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:16" (1/1) ... [2020-07-20 10:45:16,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:16" (1/1) ... [2020-07-20 10:45:16,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:16" (1/1) ... [2020-07-20 10:45:16,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:16" (1/1) ... [2020-07-20 10:45:16,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:45:16,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:45:16,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:45:16,762 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:45:16,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:16" (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 10:45:16,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:45:16,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:45:16,828 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2020-07-20 10:45:16,828 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-07-20 10:45:16,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:45:16,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:45:16,829 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2020-07-20 10:45:16,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 10:45:16,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 10:45:16,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 10:45:16,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 10:45:16,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 10:45:16,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 10:45:16,831 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-07-20 10:45:16,832 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:45:16,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:45:16,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:45:17,088 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:45:17,089 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 10:45:17,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:17 BoogieIcfgContainer [2020-07-20 10:45:17,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:45:17,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:45:17,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:45:17,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:45:17,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:45:16" (1/3) ... [2020-07-20 10:45:17,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a4502d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:17, skipping insertion in model container [2020-07-20 10:45:17,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:16" (2/3) ... [2020-07-20 10:45:17,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a4502d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:17, skipping insertion in model container [2020-07-20 10:45:17,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:17" (3/3) ... [2020-07-20 10:45:17,101 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1031.c [2020-07-20 10:45:17,113 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:45:17,121 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:45:17,139 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:45:17,171 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:45:17,171 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:45:17,171 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:45:17,172 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:45:17,172 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:45:17,172 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:45:17,172 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:45:17,172 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:45:17,193 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-20 10:45:17,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 10:45:17,199 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:17,200 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] [2020-07-20 10:45:17,201 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:17,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:17,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1659352855, now seen corresponding path program 1 times [2020-07-20 10:45:17,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:17,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569510747] [2020-07-20 10:45:17,217 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 10:45:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:17,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 10:45:17,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:17,352 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 10:45:17,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:17,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569510747] [2020-07-20 10:45:17,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:17,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 10:45:17,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447794230] [2020-07-20 10:45:17,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 10:45:17,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:17,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 10:45:17,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 10:45:17,375 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2020-07-20 10:45:17,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:17,402 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2020-07-20 10:45:17,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 10:45:17,404 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-20 10:45:17,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:17,416 INFO L225 Difference]: With dead ends: 60 [2020-07-20 10:45:17,416 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 10:45:17,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 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 10:45:17,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 10:45:17,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 10:45:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 10:45:17,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-07-20 10:45:17,466 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2020-07-20 10:45:17,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:17,467 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-07-20 10:45:17,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 10:45:17,467 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-07-20 10:45:17,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 10:45:17,469 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:17,469 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] [2020-07-20 10:45:17,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:17,684 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:17,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:17,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1719916348, now seen corresponding path program 1 times [2020-07-20 10:45:17,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:17,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161719019] [2020-07-20 10:45:17,688 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 10:45:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:45:17,774 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:45:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:45:17,806 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:45:17,832 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 10:45:17,832 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 10:45:18,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:18,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:45:18 BoogieIcfgContainer [2020-07-20 10:45:18,078 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 10:45:18,081 INFO L168 Benchmark]: Toolchain (without parser) took 1760.52 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 102.2 MB in the beginning and 122.0 MB in the end (delta: -19.8 MB). Peak memory consumption was 36.9 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:18,082 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 144.7 MB. Free memory is still 120.8 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 10:45:18,083 INFO L168 Benchmark]: CACSL2BoogieTranslator took 396.65 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 102.0 MB in the beginning and 180.4 MB in the end (delta: -78.4 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:18,084 INFO L168 Benchmark]: Boogie Preprocessor took 42.42 ms. Allocated memory is still 201.3 MB. Free memory was 180.4 MB in the beginning and 178.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:18,085 INFO L168 Benchmark]: RCFGBuilder took 331.45 ms. Allocated memory is still 201.3 MB. Free memory was 178.0 MB in the beginning and 160.2 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:18,086 INFO L168 Benchmark]: TraceAbstraction took 984.01 ms. Allocated memory is still 201.3 MB. Free memory was 159.5 MB in the beginning and 122.0 MB in the end (delta: 37.5 MB). Peak memory consumption was 37.5 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:18,097 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 144.7 MB. Free memory is still 120.8 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 396.65 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 102.0 MB in the beginning and 180.4 MB in the end (delta: -78.4 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.42 ms. Allocated memory is still 201.3 MB. Free memory was 180.4 MB in the beginning and 178.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 331.45 ms. Allocated memory is still 201.3 MB. Free memory was 178.0 MB in the beginning and 160.2 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 984.01 ms. Allocated memory is still 201.3 MB. Free memory was 159.5 MB in the beginning and 122.0 MB in the end (delta: 37.5 MB). Peak memory consumption was 37.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 70]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 55, overapproximation of someBinaryArithmeticFLOAToperation at line 42, overapproximation of bitwiseAnd at line 22. Possible FailurePath: [L65] float x = 0.0f / 0.0f; [L66] CALL, EXPR round_float(x) VAL [\old(x)=3] [L12] __uint32_t w; [L14] int exponent_less_127; VAL [\old(x)=3, x=3] [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (w) = gf_u.word [L22] exponent_less_127 = (int)((w & 0x7f800000) >> 23) - 127 VAL [\old(x)=3, exponent_less_127=128, w=8, x=3] [L24] COND FALSE !(exponent_less_127 < 23) VAL [\old(x)=3, exponent_less_127=128, w=8, x=3] [L40] COND TRUE exponent_less_127 == 128 [L42] return x + x; VAL [\old(x)=3, exponent_less_127=128, w=8, x=3] [L66] RET, EXPR round_float(x) VAL [round_float(x)=4, x=3] [L66] float res = round_float(x); [L69] CALL, EXPR isnan_float(res) VAL [\old(x)=4] [L55] return x != x; VAL [\old(x)=4, \result=0, x=4] [L69] RET, EXPR isnan_float(res) VAL [isnan_float(res)=0, res=4, x=3] [L69] COND TRUE !isnan_float(res) [L70] __VERIFIER_error() VAL [res=4, x=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 38 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred 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, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 441 SizeOfPredicates, 0 NumberOfNonLiveVariables, 70 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...