/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_1131b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:40:12,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:40:12,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:40:12,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:40:12,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:40:12,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:40:12,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:40:12,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:40:12,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:40:12,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:40:12,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:40:12,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:40:12,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:40:12,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:40:12,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:40:12,694 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:40:12,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:40:12,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:40:12,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:40:12,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:40:12,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:40:12,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:40:12,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:40:12,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:40:12,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:40:12,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:40:12,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:40:12,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:40:12,722 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 [2020-07-21 10:40:12,736 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:40:12,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:40:12,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:40:12,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:40:12,737 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:40:12,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:40:12,738 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:40:12,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:40:12,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:40:12,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:40:12,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:40:12,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:40:12,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:40:12,739 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:40:12,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:40:12,740 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:40:12,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:40:12,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:40:12,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:40:12,740 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:40:12,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:40:12,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:40:12,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:40:12,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:40:12,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:40:12,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:40:12,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:12,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:40:12,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:40:12,742 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 [2020-07-21 10:40:13,013 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:40:13,027 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:40:13,030 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:40:13,032 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:40:13,032 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:40:13,033 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1131b.c [2020-07-21 10:40:13,101 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba9e91796/adf0a3eb51c8467e83ee5cfbc0a3b396/FLAG7371c45b8 [2020-07-21 10:40:13,596 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:40:13,597 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1131b.c [2020-07-21 10:40:13,603 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba9e91796/adf0a3eb51c8467e83ee5cfbc0a3b396/FLAG7371c45b8 [2020-07-21 10:40:13,946 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba9e91796/adf0a3eb51c8467e83ee5cfbc0a3b396 [2020-07-21 10:40:13,959 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:40:13,961 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:40:13,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:13,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:40:13,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:40:13,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:13" (1/1) ... [2020-07-21 10:40:13,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c7650ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:13, skipping insertion in model container [2020-07-21 10:40:13,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:13" (1/1) ... [2020-07-21 10:40:13,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:40:14,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:40:14,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:14,215 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:40:14,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:14,373 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:40:14,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:14 WrapperNode [2020-07-21 10:40:14,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:14,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:40:14,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:40:14,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:40:14,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:14" (1/1) ... [2020-07-21 10:40:14,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:14" (1/1) ... [2020-07-21 10:40:14,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:14" (1/1) ... [2020-07-21 10:40:14,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:14" (1/1) ... [2020-07-21 10:40:14,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:14" (1/1) ... [2020-07-21 10:40:14,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:14" (1/1) ... [2020-07-21 10:40:14,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:14" (1/1) ... [2020-07-21 10:40:14,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:40:14,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:40:14,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:40:14,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:40:14,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:14" (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 [2020-07-21 10:40:14,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:40:14,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:40:14,512 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-07-21 10:40:14,512 INFO L138 BoogieDeclarations]: Found implementation of procedure isfinite_float [2020-07-21 10:40:14,512 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:40:14,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:40:14,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-21 10:40:14,512 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-07-21 10:40:14,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 10:40:14,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-21 10:40:14,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 10:40:14,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 10:40:14,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-21 10:40:14,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 10:40:14,514 INFO L130 BoogieDeclarations]: Found specification of procedure isfinite_float [2020-07-21 10:40:14,514 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:40:14,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:40:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-07-21 10:40:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:40:14,995 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:40:14,996 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-07-21 10:40:15,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:15 BoogieIcfgContainer [2020-07-21 10:40:15,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:40:15,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:40:15,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:40:15,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:40:15,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:40:13" (1/3) ... [2020-07-21 10:40:15,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50cdfcdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:15, skipping insertion in model container [2020-07-21 10:40:15,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:14" (2/3) ... [2020-07-21 10:40:15,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50cdfcdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:15, skipping insertion in model container [2020-07-21 10:40:15,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:15" (3/3) ... [2020-07-21 10:40:15,013 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1131b.c [2020-07-21 10:40:15,023 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:40:15,030 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:40:15,042 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:40:15,062 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:40:15,062 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:40:15,062 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:40:15,062 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:40:15,063 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:40:15,063 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:40:15,063 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:40:15,063 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:40:15,084 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-07-21 10:40:15,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 10:40:15,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:15,092 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] [2020-07-21 10:40:15,093 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:15,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:15,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1081724134, now seen corresponding path program 1 times [2020-07-21 10:40:15,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:15,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74316726] [2020-07-21 10:40:15,111 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 [2020-07-21 10:40:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:15,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 10:40:15,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:40:15,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:15,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74316726] [2020-07-21 10:40:15,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:15,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 10:40:15,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019953024] [2020-07-21 10:40:15,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 10:40:15,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:15,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 10:40:15,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 10:40:15,338 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 2 states. [2020-07-21 10:40:15,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:15,372 INFO L93 Difference]: Finished difference Result 112 states and 175 transitions. [2020-07-21 10:40:15,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 10:40:15,374 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2020-07-21 10:40:15,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:15,386 INFO L225 Difference]: With dead ends: 112 [2020-07-21 10:40:15,387 INFO L226 Difference]: Without dead ends: 55 [2020-07-21 10:40:15,391 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 [2020-07-21 10:40:15,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-21 10:40:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-07-21 10:40:15,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 10:40:15,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2020-07-21 10:40:15,440 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 25 [2020-07-21 10:40:15,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:15,441 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2020-07-21 10:40:15,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 10:40:15,442 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2020-07-21 10:40:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 10:40:15,443 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:15,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:15,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:15,658 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:15,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:15,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1695884658, now seen corresponding path program 1 times [2020-07-21 10:40:15,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:15,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127847997] [2020-07-21 10:40:15,661 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 [2020-07-21 10:40:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 10:40:15,745 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 10:40:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 10:40:15,779 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 10:40:15,815 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 10:40:15,816 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 10:40:16,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:16,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:40:16 BoogieIcfgContainer [2020-07-21 10:40:16,069 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:40:16,071 INFO L168 Benchmark]: Toolchain (without parser) took 2110.53 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 101.0 MB in the beginning and 99.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 66.9 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:16,072 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 10:40:16,074 INFO L168 Benchmark]: CACSL2BoogieTranslator took 411.91 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 100.6 MB in the beginning and 178.5 MB in the end (delta: -77.9 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:16,075 INFO L168 Benchmark]: Boogie Preprocessor took 63.49 ms. Allocated memory is still 201.9 MB. Free memory was 178.5 MB in the beginning and 175.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:16,075 INFO L168 Benchmark]: RCFGBuilder took 557.71 ms. Allocated memory is still 201.9 MB. Free memory was 175.8 MB in the beginning and 147.8 MB in the end (delta: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:16,076 INFO L168 Benchmark]: TraceAbstraction took 1065.91 ms. Allocated memory is still 201.9 MB. Free memory was 147.1 MB in the beginning and 99.2 MB in the end (delta: 48.0 MB). Peak memory consumption was 48.0 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:16,080 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 411.91 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 100.6 MB in the beginning and 178.5 MB in the end (delta: -77.9 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 63.49 ms. Allocated memory is still 201.9 MB. Free memory was 178.5 MB in the beginning and 175.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 557.71 ms. Allocated memory is still 201.9 MB. Free memory was 175.8 MB in the beginning and 147.8 MB in the end (delta: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1065.91 ms. Allocated memory is still 201.9 MB. Free memory was 147.1 MB in the beginning and 99.2 MB in the end (delta: 48.0 MB). Peak memory consumption was 48.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 135]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 134, overapproximation of someUnaryDOUBLEoperation at line 14, overapproximation of bitwiseAnd at line 30, overapproximation of someBinaryArithmeticFLOAToperation at line 35, overapproximation of bitwiseXor at line 31. Possible FailurePath: [L12-L15] static const float one_fmod = 1.0, Zero_fmod[] = { 0.0, -0.0, }; VAL [\old(one_fmod)=2, \old(Zero_fmod)=7, \old(Zero_fmod)=6, one_fmod=1, Zero_fmod={5:0}] [L126] float x = __VERIFIER_nondet_float(); [L127] float y = -1.0f / 0.0f; VAL [one_fmod=1, x=3, Zero_fmod={5:0}] [L129] CALL isfinite_float(x) VAL [\old(x)=3, one_fmod=1, Zero_fmod={5:0}] [L109] __int32_t ix; VAL [\old(x)=3, one_fmod=1, x=3, Zero_fmod={5:0}] [L111] ieee_float_shape_type gf_u; [L112] gf_u.value = (x) [L113] EXPR gf_u.word [L113] (ix) = gf_u.word [L115] ix &= 0x7fffffff [L116] return (((ix) < 0x7f800000L)); VAL [\old(x)=3, \result=1, ix=0, one_fmod=1, x=3, Zero_fmod={5:0}] [L129] RET isfinite_float(x) VAL [isfinite_float(x)=1, one_fmod=1, x=3, Zero_fmod={5:0}] [L129] COND TRUE isfinite_float(x) [L131] CALL, EXPR fmod_float(x, y) VAL [\old(x)=3, \old(y)=5, one_fmod=1, Zero_fmod={5:0}] [L18] __int32_t n, hx, hy, hz, ix, iy, sx, i; VAL [\old(x)=3, \old(y)=5, one_fmod=1, x=3, y=5, Zero_fmod={5:0}] [L21] ieee_float_shape_type gf_u; [L22] gf_u.value = (x) [L23] EXPR gf_u.word [L23] (hx) = gf_u.word [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (y) [L28] EXPR gf_u.word [L28] (hy) = gf_u.word [L30] sx = hx & 0x80000000 [L31] hx ^= sx [L32] hy &= 0x7fffffff VAL [\old(x)=3, \old(y)=5, one_fmod=1, sx=10450, x=3, y=5, Zero_fmod={5:0}] [L34] COND TRUE ((hy) == 0) || !((hx) < 0x7f800000L) || ((hy) > 0x7f800000L) [L35] return (x * y) / (x * y); VAL [\old(x)=3, \old(y)=5, hx=2139095040, hy=0, one_fmod=1, sx=10450, x=3, y=5, Zero_fmod={5:0}] [L131] RET, EXPR fmod_float(x, y) VAL [fmod_float(x, y)=8, one_fmod=1, x=3, y=5, Zero_fmod={5:0}] [L131] float res = fmod_float(x, y); [L134] COND TRUE res != x VAL [one_fmod=1, res=8, x=3, y=5, Zero_fmod={5:0}] [L135] __VERIFIER_error() VAL [one_fmod=1, res=8, x=3, y=5, Zero_fmod={5:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 60 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: 76 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=60occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 576 SizeOfPredicates, 0 NumberOfNonLiveVariables, 106 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...