/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 19:27:13,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 19:27:13,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 19:27:13,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 19:27:13,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 19:27:13,609 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 19:27:13,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 19:27:13,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 19:27:13,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 19:27:13,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 19:27:13,621 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 19:27:13,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 19:27:13,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 19:27:13,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 19:27:13,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 19:27:13,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 19:27:13,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 19:27:13,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 19:27:13,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 19:27:13,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 19:27:13,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 19:27:13,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 19:27:13,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 19:27:13,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 19:27:13,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 19:27:13,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 19:27:13,666 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 19:27:13,667 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 19:27:13,667 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 19:27:13,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-18 19:27:13,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 19:27:13,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 19:27:13,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 19:27:13,678 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 19:27:13,700 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 19:27:13,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 19:27:13,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 19:27:13,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 19:27:13,702 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 19:27:13,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 19:27:13,703 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 19:27:13,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 19:27:13,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 19:27:13,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 19:27:13,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 19:27:13,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 19:27:13,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 19:27:13,704 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 19:27:13,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 19:27:13,705 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 19:27:13,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 19:27:13,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 19:27:13,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 19:27:13,705 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 19:27:13,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 19:27:13,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:27:13,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 19:27:13,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 19:27:13,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 19:27:13,707 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 19:27:13,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 19:27:13,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 19:27:13,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 19:27:13,707 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; [2020-08-18 19:27:14,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 19:27:14,031 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 19:27:14,036 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 19:27:14,038 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 19:27:14,039 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 19:27:14,040 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c [2020-08-18 19:27:14,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f95e40152/84941a79b7e14594bfd39c59bceae5c0/FLAG4ebd7cc57 [2020-08-18 19:27:14,595 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 19:27:14,596 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c [2020-08-18 19:27:14,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f95e40152/84941a79b7e14594bfd39c59bceae5c0/FLAG4ebd7cc57 [2020-08-18 19:27:14,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f95e40152/84941a79b7e14594bfd39c59bceae5c0 [2020-08-18 19:27:14,977 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 19:27:14,978 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 19:27:14,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 19:27:14,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 19:27:14,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 19:27:14,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:27:14" (1/1) ... [2020-08-18 19:27:14,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d15d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:14, skipping insertion in model container [2020-08-18 19:27:14,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:27:14" (1/1) ... [2020-08-18 19:27:14,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 19:27:15,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 19:27:15,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:27:15,190 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 19:27:15,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:27:15,237 INFO L208 MainTranslator]: Completed translation [2020-08-18 19:27:15,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:15 WrapperNode [2020-08-18 19:27:15,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 19:27:15,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 19:27:15,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 19:27:15,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 19:27:15,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:15" (1/1) ... [2020-08-18 19:27:15,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:15" (1/1) ... [2020-08-18 19:27:15,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:15" (1/1) ... [2020-08-18 19:27:15,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:15" (1/1) ... [2020-08-18 19:27:15,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:15" (1/1) ... [2020-08-18 19:27:15,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:15" (1/1) ... [2020-08-18 19:27:15,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:15" (1/1) ... [2020-08-18 19:27:15,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 19:27:15,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 19:27:15,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 19:27:15,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 19:27:15,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 19:27:15,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 19:27:15,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 19:27:15,433 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2020-08-18 19:27:15,433 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-18 19:27:15,433 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 19:27:15,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 19:27:15,434 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2020-08-18 19:27:15,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 19:27:15,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 19:27:15,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 19:27:15,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 19:27:15,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 19:27:15,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 19:27:15,435 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-18 19:27:15,435 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 19:27:15,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 19:27:15,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 19:27:15,771 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 19:27:15,771 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-08-18 19:27:15,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:27:15 BoogieIcfgContainer [2020-08-18 19:27:15,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 19:27:15,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 19:27:15,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 19:27:15,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 19:27:15,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 07:27:14" (1/3) ... [2020-08-18 19:27:15,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b25d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:27:15, skipping insertion in model container [2020-08-18 19:27:15,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:15" (2/3) ... [2020-08-18 19:27:15,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b25d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:27:15, skipping insertion in model container [2020-08-18 19:27:15,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:27:15" (3/3) ... [2020-08-18 19:27:15,786 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1072d.c [2020-08-18 19:27:15,797 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 19:27:15,805 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 19:27:15,820 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 19:27:15,845 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 19:27:15,846 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 19:27:15,846 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 19:27:15,846 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 19:27:15,846 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 19:27:15,846 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 19:27:15,846 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 19:27:15,846 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 19:27:15,865 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-18 19:27:15,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 19:27:15,871 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:27:15,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:27:15,873 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:27:15,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:27:15,878 INFO L82 PathProgramCache]: Analyzing trace with hash 753691903, now seen corresponding path program 1 times [2020-08-18 19:27:15,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:27:15,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196020084] [2020-08-18 19:27:15,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:27:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:16,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:27:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:16,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:27:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:27:16,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196020084] [2020-08-18 19:27:16,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:27:16,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 19:27:16,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075501727] [2020-08-18 19:27:16,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 19:27:16,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:27:16,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 19:27:16,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 19:27:16,167 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2020-08-18 19:27:16,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:27:16,366 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2020-08-18 19:27:16,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 19:27:16,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-08-18 19:27:16,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:27:16,378 INFO L225 Difference]: With dead ends: 68 [2020-08-18 19:27:16,379 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 19:27:16,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 19:27:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 19:27:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-08-18 19:27:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 19:27:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-08-18 19:27:16,431 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 18 [2020-08-18 19:27:16,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:27:16,432 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-08-18 19:27:16,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 19:27:16,432 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-08-18 19:27:16,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 19:27:16,433 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:27:16,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:27:16,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 19:27:16,434 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:27:16,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:27:16,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1111015325, now seen corresponding path program 1 times [2020-08-18 19:27:16,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:27:16,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889237731] [2020-08-18 19:27:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:27:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 19:27:16,501 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 19:27:16,501 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 19:27:16,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 19:27:16,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 07:27:16 BoogieIcfgContainer [2020-08-18 19:27:16,524 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 19:27:16,527 INFO L168 Benchmark]: Toolchain (without parser) took 1548.15 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 101.5 MB in the beginning and 115.9 MB in the end (delta: -14.4 MB). Peak memory consumption was 48.0 MB. Max. memory is 7.1 GB. [2020-08-18 19:27:16,528 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 19:27:16,529 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.87 ms. Allocated memory is still 137.9 MB. Free memory was 101.3 MB in the beginning and 89.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2020-08-18 19:27:16,530 INFO L168 Benchmark]: Boogie Preprocessor took 132.49 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 89.9 MB in the beginning and 177.3 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-18 19:27:16,531 INFO L168 Benchmark]: RCFGBuilder took 405.88 ms. Allocated memory is still 200.3 MB. Free memory was 177.3 MB in the beginning and 157.3 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-08-18 19:27:16,532 INFO L168 Benchmark]: TraceAbstraction took 745.87 ms. Allocated memory is still 200.3 MB. Free memory was 156.6 MB in the beginning and 115.9 MB in the end (delta: 40.6 MB). Peak memory consumption was 40.6 MB. Max. memory is 7.1 GB. [2020-08-18 19:27:16,536 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 258.87 ms. Allocated memory is still 137.9 MB. Free memory was 101.3 MB in the beginning and 89.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.49 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 89.9 MB in the beginning and 177.3 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 405.88 ms. Allocated memory is still 200.3 MB. Free memory was 177.3 MB in the beginning and 157.3 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 745.87 ms. Allocated memory is still 200.3 MB. Free memory was 156.6 MB in the beginning and 115.9 MB in the end (delta: 40.6 MB). Peak memory consumption was 40.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 67]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 66, overapproximation of bitwiseAnd at line 19, overapproximation of someUnaryFLOAToperation at line 62, overapproximation of someBinaryArithmeticFLOAToperation at line 38. Possible FailurePath: [L62] float x = -0.0f; [L63] CALL, EXPR trunc_float(x) [L13] __int32_t signbit, w, exponent_less_127; [L15] ieee_float_shape_type gf_u; [L16] gf_u.value = (x) [L17] EXPR gf_u.word [L17] (w) = gf_u.word [L19] signbit = w & 0x80000000 [L20] exponent_less_127 = ((w & 0x7f800000) >> 23) - 127 [L21] COND FALSE !(exponent_less_127 < 23) [L37] COND TRUE exponent_less_127 == 255 [L38] return x + x; [L63] RET, EXPR trunc_float(x) [L63] float res = trunc_float(x); [L66] EXPR res == -0.0f && __signbit_float(res) == 1 [L66] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L67] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 34 SDtfs, 29 SDslu, 5 SDs, 0 SdLazy, 41 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred 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, 0.1s InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 646 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...