/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 [2020-07-20 10:45:24,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 10:45:24,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 10:45:24,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 10:45:24,574 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:45:24,575 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:45:24,577 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:45:24,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:45:24,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:45:24,581 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:45:24,582 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:45:24,584 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:45:24,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:45:24,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:45:24,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:45:24,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:45:24,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:45:24,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:45:24,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:45:24,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:45:24,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:45:24,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:45:24,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:45:24,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:45:24,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:45:24,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:45:24,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:45:24,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:45:24,612 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 10:45:24,626 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:45:24,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:45:24,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:45:24,628 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:45:24,628 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:45:24,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:45:24,629 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:45:24,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:45:24,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:45:24,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:45:24,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:45:24,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:45:24,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:45:24,630 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:45:24,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:45:24,631 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:45:24,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:45:24,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:45:24,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:45:24,631 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:45:24,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:45:24,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:45:24,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:45:24,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:45:24,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:45:24,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:45:24,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:24,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:45:24,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:45:24,633 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 10:45:24,894 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:45:24,907 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:45:24,910 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:45:24,912 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:45:24,912 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:45:24,913 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1131b.c [2020-07-20 10:45:24,988 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a38a0c42/2e7314b7481d4ecb81f006694a73567f/FLAG04566309e [2020-07-20 10:45:25,513 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:45:25,514 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1131b.c [2020-07-20 10:45:25,524 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a38a0c42/2e7314b7481d4ecb81f006694a73567f/FLAG04566309e [2020-07-20 10:45:25,851 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a38a0c42/2e7314b7481d4ecb81f006694a73567f [2020-07-20 10:45:25,859 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:45:25,862 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:45:25,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:25,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:45:25,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:45:25,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:25" (1/1) ... [2020-07-20 10:45:25,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a07edf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:25, skipping insertion in model container [2020-07-20 10:45:25,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:25" (1/1) ... [2020-07-20 10:45:25,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:45:25,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:45:26,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:26,133 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:45:26,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:26,307 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:45:26,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:26 WrapperNode [2020-07-20 10:45:26,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:26,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:45:26,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:45:26,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:45:26,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:26" (1/1) ... [2020-07-20 10:45:26,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:26" (1/1) ... [2020-07-20 10:45:26,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:26" (1/1) ... [2020-07-20 10:45:26,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:26" (1/1) ... [2020-07-20 10:45:26,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:26" (1/1) ... [2020-07-20 10:45:26,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:26" (1/1) ... [2020-07-20 10:45:26,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:26" (1/1) ... [2020-07-20 10:45:26,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:45:26,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:45:26,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:45:26,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:45:26,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:26" (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 10:45:26,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:45:26,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:45:26,429 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-07-20 10:45:26,429 INFO L138 BoogieDeclarations]: Found implementation of procedure isfinite_float [2020-07-20 10:45:26,429 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:45:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:45:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-20 10:45:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-07-20 10:45:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 10:45:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 10:45:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 10:45:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 10:45:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 10:45:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 10:45:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure isfinite_float [2020-07-20 10:45:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:45:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:45:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-07-20 10:45:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:45:26,892 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:45:26,892 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-07-20 10:45:26,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:26 BoogieIcfgContainer [2020-07-20 10:45:26,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:45:26,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:45:26,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:45:26,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:45:26,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:45:25" (1/3) ... [2020-07-20 10:45:26,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8e30f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:26, skipping insertion in model container [2020-07-20 10:45:26,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:26" (2/3) ... [2020-07-20 10:45:26,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8e30f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:26, skipping insertion in model container [2020-07-20 10:45:26,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:26" (3/3) ... [2020-07-20 10:45:26,906 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1131b.c [2020-07-20 10:45:26,916 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:45:26,924 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:45:26,939 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:45:26,962 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:45:26,962 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:45:26,962 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:45:26,962 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:45:26,963 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:45:26,963 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:45:26,963 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:45:26,963 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:45:26,983 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-07-20 10:45:26,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 10:45:26,991 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:26,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:26,992 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:26,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:26,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1081724134, now seen corresponding path program 1 times [2020-07-20 10:45:27,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:27,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918486500] [2020-07-20 10:45:27,006 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 10:45:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:27,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 10:45:27,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:27,151 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 10:45:27,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:27,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918486500] [2020-07-20 10:45:27,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:27,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 10:45:27,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932176384] [2020-07-20 10:45:27,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 10:45:27,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:27,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 10:45:27,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 10:45:27,180 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 2 states. [2020-07-20 10:45:27,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:27,214 INFO L93 Difference]: Finished difference Result 112 states and 175 transitions. [2020-07-20 10:45:27,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 10:45:27,215 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2020-07-20 10:45:27,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:27,228 INFO L225 Difference]: With dead ends: 112 [2020-07-20 10:45:27,228 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 10:45:27,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 10:45:27,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 10:45:27,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-07-20 10:45:27,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 10:45:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2020-07-20 10:45:27,280 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 25 [2020-07-20 10:45:27,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:27,281 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2020-07-20 10:45:27,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 10:45:27,281 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2020-07-20 10:45:27,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 10:45:27,283 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:27,283 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] [2020-07-20 10:45:27,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:27,497 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:27,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:27,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1695884658, now seen corresponding path program 1 times [2020-07-20 10:45:27,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:27,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338712014] [2020-07-20 10:45:27,499 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 10:45:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:45:27,596 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:45:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:45:27,629 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:45:27,664 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 10:45:27,664 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 10:45:27,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:27,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:45:27 BoogieIcfgContainer [2020-07-20 10:45:27,918 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 10:45:27,921 INFO L168 Benchmark]: Toolchain (without parser) took 2059.48 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 99.7 MB in the beginning and 98.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 65.6 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:27,922 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 118.6 MB in the beginning and 118.4 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 10:45:27,923 INFO L168 Benchmark]: CACSL2BoogieTranslator took 445.18 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 99.3 MB in the beginning and 178.0 MB in the end (delta: -78.7 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:27,924 INFO L168 Benchmark]: Boogie Preprocessor took 55.26 ms. Allocated memory is still 201.3 MB. Free memory was 178.0 MB in the beginning and 175.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:27,925 INFO L168 Benchmark]: RCFGBuilder took 532.50 ms. Allocated memory is still 201.3 MB. Free memory was 175.3 MB in the beginning and 147.0 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:27,926 INFO L168 Benchmark]: TraceAbstraction took 1020.33 ms. Allocated memory is still 201.3 MB. Free memory was 147.0 MB in the beginning and 98.6 MB in the end (delta: 48.4 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:27,933 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 136.8 MB. Free memory was 118.6 MB in the beginning and 118.4 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 445.18 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 99.3 MB in the beginning and 178.0 MB in the end (delta: -78.7 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 55.26 ms. Allocated memory is still 201.3 MB. Free memory was 178.0 MB in the beginning and 175.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 532.50 ms. Allocated memory is still 201.3 MB. Free memory was 175.3 MB in the beginning and 147.0 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1020.33 ms. Allocated memory is still 201.3 MB. Free memory was 147.0 MB in the beginning and 98.6 MB in the end (delta: 48.4 MB). Peak memory consumption was 48.4 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)=6, \old(Zero_fmod)=5, one_fmod=1, Zero_fmod={4:0}] [L126] float x = __VERIFIER_nondet_float(); [L127] float y = -1.0f / 0.0f; VAL [one_fmod=1, x=3, Zero_fmod={4:0}] [L129] CALL isfinite_float(x) VAL [\old(x)=3, one_fmod=1, Zero_fmod={4:0}] [L109] __int32_t ix; VAL [\old(x)=3, one_fmod=1, x=3, Zero_fmod={4:0}] [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={4:0}] [L129] RET isfinite_float(x) VAL [isfinite_float(x)=1, one_fmod=1, x=3, Zero_fmod={4:0}] [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={4:0}] [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={4:0}] [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=4294967295, x=3, y=5, Zero_fmod={4:0}] [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=4294967295, x=3, y=5, Zero_fmod={4:0}] [L131] RET, EXPR fmod_float(x, y) VAL [fmod_float(x, y)=7, one_fmod=1, x=3, y=5, Zero_fmod={4:0}] [L131] float res = fmod_float(x, y); [L134] COND TRUE res != x VAL [one_fmod=1, res=7, x=3, y=5, Zero_fmod={4:0}] [L135] __VERIFIER_error() VAL [one_fmod=1, res=7, x=3, y=5, Zero_fmod={4:0}] - 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...