/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/double_req_bl_1072b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 10:45:02,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 10:45:02,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 10:45:02,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 10:45:02,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:45:02,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:45:02,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:45:02,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:45:02,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:45:02,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:45:02,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:45:02,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:45:02,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:45:02,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:45:02,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:45:02,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:45:02,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:45:02,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:45:02,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:45:02,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:45:02,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:45:02,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:45:02,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:45:02,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:45:02,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:45:02,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:45:02,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:45:02,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:45:02,890 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 10:45:02,913 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:45:02,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:45:02,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:45:02,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:45:02,917 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:45:02,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:45:02,918 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:45:02,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:45:02,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:45:02,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:45:02,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:45:02,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:45:02,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:45:02,920 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:45:02,920 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:45:02,921 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:45:02,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:45:02,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:45:02,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:45:02,921 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:45:02,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:45:02,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:45:02,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:45:02,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:45:02,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:45:02,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:45:02,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:02,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:45:02,923 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:45:02,924 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 10:45:03,215 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:45:03,229 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:45:03,233 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:45:03,234 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:45:03,235 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:45:03,235 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1072b.c [2020-07-20 10:45:03,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6af1ac9b/257b79985f35466da63ef2eb0f4016eb/FLAGa578cb77c [2020-07-20 10:45:03,754 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:45:03,755 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1072b.c [2020-07-20 10:45:03,763 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6af1ac9b/257b79985f35466da63ef2eb0f4016eb/FLAGa578cb77c [2020-07-20 10:45:04,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6af1ac9b/257b79985f35466da63ef2eb0f4016eb [2020-07-20 10:45:04,178 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:45:04,181 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:45:04,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:04,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:45:04,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:45:04,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:04" (1/1) ... [2020-07-20 10:45:04,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b3ae9d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04, skipping insertion in model container [2020-07-20 10:45:04,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:04" (1/1) ... [2020-07-20 10:45:04,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:45:04,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:45:04,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:04,468 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:45:04,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:04,618 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:45:04,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04 WrapperNode [2020-07-20 10:45:04,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:04,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:45:04,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:45:04,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:45:04,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04" (1/1) ... [2020-07-20 10:45:04,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04" (1/1) ... [2020-07-20 10:45:04,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04" (1/1) ... [2020-07-20 10:45:04,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04" (1/1) ... [2020-07-20 10:45:04,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04" (1/1) ... [2020-07-20 10:45:04,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04" (1/1) ... [2020-07-20 10:45:04,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04" (1/1) ... [2020-07-20 10:45:04,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:45:04,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:45:04,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:45:04,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:45:04,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:45:04,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:45:04,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:45:04,742 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_double [2020-07-20 10:45:04,743 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_double [2020-07-20 10:45:04,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_double [2020-07-20 10:45:04,743 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:45:04,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:45:04,743 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_double [2020-07-20 10:45:04,744 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_double [2020-07-20 10:45:04,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 10:45:04,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 10:45:04,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 10:45:04,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 10:45:04,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 10:45:04,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 10:45:04,746 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_double [2020-07-20 10:45:04,746 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:45:04,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:45:04,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:45:05,110 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:45:05,111 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-07-20 10:45:05,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:05 BoogieIcfgContainer [2020-07-20 10:45:05,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:45:05,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:45:05,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:45:05,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:45:05,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:45:04" (1/3) ... [2020-07-20 10:45:05,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59854ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:05, skipping insertion in model container [2020-07-20 10:45:05,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:04" (2/3) ... [2020-07-20 10:45:05,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59854ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:05, skipping insertion in model container [2020-07-20 10:45:05,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:05" (3/3) ... [2020-07-20 10:45:05,125 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_1072b.c [2020-07-20 10:45:05,137 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:45:05,145 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:45:05,159 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:45:05,185 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:45:05,185 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:45:05,185 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:45:05,186 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:45:05,186 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:45:05,186 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:45:05,186 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:45:05,186 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:45:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-07-20 10:45:05,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 10:45:05,214 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:05,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:05,215 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:05,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:05,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1730648367, now seen corresponding path program 1 times [2020-07-20 10:45:05,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:05,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046934869] [2020-07-20 10:45:05,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:05,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 10:45:05,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 10:45:05,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:05,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046934869] [2020-07-20 10:45:05,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:05,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 10:45:05,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312467714] [2020-07-20 10:45:05,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 10:45:05,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:05,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 10:45:05,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 10:45:05,389 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-07-20 10:45:05,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:05,414 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2020-07-20 10:45:05,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 10:45:05,416 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-07-20 10:45:05,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:05,426 INFO L225 Difference]: With dead ends: 74 [2020-07-20 10:45:05,427 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 10:45:05,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 10:45:05,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 10:45:05,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-20 10:45:05,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 10:45:05,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-07-20 10:45:05,472 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 19 [2020-07-20 10:45:05,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:05,473 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-07-20 10:45:05,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 10:45:05,474 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-07-20 10:45:05,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 10:45:05,475 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:05,475 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] [2020-07-20 10:45:05,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:05,684 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:05,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:05,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1938753225, now seen corresponding path program 1 times [2020-07-20 10:45:05,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:05,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071186591] [2020-07-20 10:45:05,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:45:05,769 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:45:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:45:05,787 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:45:05,808 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 10:45:05,808 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 10:45:06,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:06,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:45:06 BoogieIcfgContainer [2020-07-20 10:45:06,057 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 10:45:06,060 INFO L168 Benchmark]: Toolchain (without parser) took 1879.31 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 101.2 MB in the beginning and 114.1 MB in the end (delta: -12.9 MB). Peak memory consumption was 50.5 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:06,061 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 10:45:06,062 INFO L168 Benchmark]: CACSL2BoogieTranslator took 436.90 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 100.8 MB in the beginning and 179.7 MB in the end (delta: -78.9 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:06,063 INFO L168 Benchmark]: Boogie Preprocessor took 56.30 ms. Allocated memory is still 201.3 MB. Free memory was 179.7 MB in the beginning and 177.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:06,064 INFO L168 Benchmark]: RCFGBuilder took 439.51 ms. Allocated memory is still 201.3 MB. Free memory was 177.3 MB in the beginning and 153.7 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:06,065 INFO L168 Benchmark]: TraceAbstraction took 940.09 ms. Allocated memory is still 201.3 MB. Free memory was 153.1 MB in the beginning and 114.1 MB in the end (delta: 38.9 MB). Peak memory consumption was 38.9 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:06,069 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 436.90 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 100.8 MB in the beginning and 179.7 MB in the end (delta: -78.9 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.30 ms. Allocated memory is still 201.3 MB. Free memory was 179.7 MB in the beginning and 177.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 439.51 ms. Allocated memory is still 201.3 MB. Free memory was 177.3 MB in the beginning and 153.7 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 940.09 ms. Allocated memory is still 201.3 MB. Free memory was 153.1 MB in the beginning and 114.1 MB in the end (delta: 38.9 MB). Peak memory consumption was 38.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 86]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 85, overapproximation of bitwiseAnd at line 28, overapproximation of someBinaryArithmeticDOUBLEoperation at line 49. Possible FailurePath: [L81] double x = 0.0; VAL [x=0] [L82] CALL, EXPR trunc_double(x) VAL [\old(x)=0] [L18] int signbit; [L19] int msw; [L20] unsigned int lsw; [L21] int exponent_less_1023; VAL [\old(x)=0, x=0] [L23] ieee_double_shape_type ew_u; [L24] ew_u.value = (x) [L25] EXPR ew_u.parts.msw [L25] (msw) = ew_u.parts.msw [L26] EXPR ew_u.parts.lsw [L26] (lsw) = ew_u.parts.lsw [L28] signbit = msw & 0x80000000 [L29] exponent_less_1023 = ((msw & 0x7ff00000) >> 20) - 1023 VAL [\old(x)=0, exponent_less_1023=1024, lsw=9, msw=2437, signbit=8855, x=0] [L30] COND FALSE !(exponent_less_1023 < 20) VAL [\old(x)=0, exponent_less_1023=1024, lsw=9, msw=2437, signbit=8855, x=0] [L47] COND TRUE exponent_less_1023 > 51 VAL [\old(x)=0, exponent_less_1023=1024, lsw=9, msw=2437, signbit=8855, x=0] [L48] COND TRUE exponent_less_1023 == 1024 [L49] return x + x; VAL [\old(x)=0, exponent_less_1023=1024, lsw=9, msw=2437, signbit=8855, x=0] [L82] RET, EXPR trunc_double(x) VAL [trunc_double(x)=2, x=0] [L82] double res = trunc_double(x); [L85] EXPR res == 0.0 && __signbit_double(res) == 0 VAL [res=2, res == 0.0 && __signbit_double(res) == 0=0, x=0] [L85] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L86] __VERIFIER_error() VAL [res=2, x=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 44 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: 45 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred 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, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 324 SizeOfPredicates, 0 NumberOfNonLiveVariables, 61 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...