/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=SHALLOWEST -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 0.1.25-5644d1e-m [2020-08-18 20:15:13,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 20:15:13,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 20:15:13,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 20:15:13,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 20:15:13,512 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 20:15:13,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 20:15:13,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 20:15:13,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 20:15:13,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 20:15:13,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 20:15:13,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 20:15:13,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:15:13,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:15:13,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:15:13,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:15:13,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:15:13,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:15:13,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:15:13,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:15:13,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:15:13,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:15:13,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:15:13,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:15:13,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 20:15:13,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 20:15:13,554 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 20:15:13,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 20:15:13,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 20:15:13,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-18 20:15:13,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:15:13,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:15:13,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:15:13,566 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 20:15:13,609 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:15:13,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:15:13,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:15:13,611 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:15:13,611 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:15:13,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:15:13,612 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 20:15:13,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:15:13,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 20:15:13,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:15:13,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:15:13,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:15:13,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:15:13,615 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 20:15:13,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:15:13,615 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:15:13,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:15:13,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:15:13,616 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:15:13,616 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:15:13,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:15:13,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:15:13,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:15:13,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:15:13,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:15:13,617 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:15:13,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:15:13,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:15:13,618 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:15:13,618 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=SHALLOWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; [2020-08-18 20:15:13,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:15:13,917 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:15:13,920 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:15:13,922 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:15:13,922 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:15:13,923 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1072b.c [2020-08-18 20:15:13,989 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b3b2727d/d461c452f66747e18757e7202e812f34/FLAG7672ce5a2 [2020-08-18 20:15:14,490 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:15:14,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/double_req_bl_1072b.c [2020-08-18 20:15:14,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b3b2727d/d461c452f66747e18757e7202e812f34/FLAG7672ce5a2 [2020-08-18 20:15:14,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b3b2727d/d461c452f66747e18757e7202e812f34 [2020-08-18 20:15:14,855 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:15:14,857 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:15:14,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:15:14,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:15:14,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:15:14,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:15:14" (1/1) ... [2020-08-18 20:15:14,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@240fc400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:14, skipping insertion in model container [2020-08-18 20:15:14,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:15:14" (1/1) ... [2020-08-18 20:15:14,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:15:14,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:15:15,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:15:15,099 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:15:15,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:15:15,261 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:15:15,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:15 WrapperNode [2020-08-18 20:15:15,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:15:15,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:15:15,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:15:15,263 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:15:15,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:15" (1/1) ... [2020-08-18 20:15:15,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:15" (1/1) ... [2020-08-18 20:15:15,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:15" (1/1) ... [2020-08-18 20:15:15,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:15" (1/1) ... [2020-08-18 20:15:15,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:15" (1/1) ... [2020-08-18 20:15:15,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:15" (1/1) ... [2020-08-18 20:15:15,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:15" (1/1) ... [2020-08-18 20:15:15,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:15:15,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:15:15,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:15:15,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:15:15,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:15" (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 20:15:15,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:15:15,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:15:15,375 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_double [2020-08-18 20:15:15,375 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_double [2020-08-18 20:15:15,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_double [2020-08-18 20:15:15,375 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:15:15,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:15:15,375 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_double [2020-08-18 20:15:15,375 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_double [2020-08-18 20:15:15,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 20:15:15,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 20:15:15,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 20:15:15,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 20:15:15,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 20:15:15,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 20:15:15,376 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_double [2020-08-18 20:15:15,376 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:15:15,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:15:15,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:15:15,818 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:15:15,819 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-08-18 20:15:15,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:15:15 BoogieIcfgContainer [2020-08-18 20:15:15,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:15:15,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:15:15,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:15:15,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:15:15,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:15:14" (1/3) ... [2020-08-18 20:15:15,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@783e04a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:15:15, skipping insertion in model container [2020-08-18 20:15:15,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:15" (2/3) ... [2020-08-18 20:15:15,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@783e04a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:15:15, skipping insertion in model container [2020-08-18 20:15:15,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:15:15" (3/3) ... [2020-08-18 20:15:15,833 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_1072b.c [2020-08-18 20:15:15,844 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:15:15,852 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:15:15,867 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:15:15,889 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:15:15,890 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:15:15,890 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:15:15,890 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:15:15,890 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:15:15,890 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:15:15,891 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:15:15,891 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:15:15,907 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-18 20:15:15,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 20:15:15,914 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:15:15,915 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 20:15:15,915 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:15:15,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:15:15,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1730648367, now seen corresponding path program 1 times [2020-08-18 20:15:15,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:15:15,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737529395] [2020-08-18 20:15:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:15:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:15:16,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:15:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:15:16,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:15:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:15:16,169 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 20:15:16,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737529395] [2020-08-18 20:15:16,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:15:16,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 20:15:16,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455207677] [2020-08-18 20:15:16,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 20:15:16,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:15:16,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 20:15:16,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 20:15:16,201 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 4 states. [2020-08-18 20:15:16,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:15:16,398 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2020-08-18 20:15:16,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 20:15:16,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-18 20:15:16,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:15:16,410 INFO L225 Difference]: With dead ends: 74 [2020-08-18 20:15:16,411 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 20:15:16,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 20:15:16,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 20:15:16,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-08-18 20:15:16,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-18 20:15:16,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-08-18 20:15:16,461 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 19 [2020-08-18 20:15:16,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:15:16,461 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-08-18 20:15:16,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 20:15:16,461 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-08-18 20:15:16,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 20:15:16,463 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:15:16,463 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] [2020-08-18 20:15:16,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:15:16,463 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:15:16,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:15:16,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1938753225, now seen corresponding path program 1 times [2020-08-18 20:15:16,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:15:16,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588211304] [2020-08-18 20:15:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:15:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 20:15:16,535 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 20:15:16,535 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 20:15:16,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:15:16,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 08:15:16 BoogieIcfgContainer [2020-08-18 20:15:16,565 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 20:15:16,573 INFO L168 Benchmark]: Toolchain (without parser) took 1710.10 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 101.2 MB in the beginning and 112.8 MB in the end (delta: -11.6 MB). Peak memory consumption was 52.4 MB. Max. memory is 7.1 GB. [2020-08-18 20:15:16,574 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 20:15:16,577 INFO L168 Benchmark]: CACSL2BoogieTranslator took 403.38 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 101.0 MB in the beginning and 181.9 MB in the end (delta: -81.0 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-08-18 20:15:16,578 INFO L168 Benchmark]: Boogie Preprocessor took 47.90 ms. Allocated memory is still 203.9 MB. Free memory was 181.9 MB in the beginning and 179.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-08-18 20:15:16,579 INFO L168 Benchmark]: RCFGBuilder took 514.46 ms. Allocated memory is still 203.9 MB. Free memory was 179.4 MB in the beginning and 156.1 MB in the end (delta: 23.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. [2020-08-18 20:15:16,580 INFO L168 Benchmark]: TraceAbstraction took 739.11 ms. Allocated memory is still 203.9 MB. Free memory was 155.4 MB in the beginning and 112.8 MB in the end (delta: 42.6 MB). Peak memory consumption was 42.6 MB. Max. memory is 7.1 GB. [2020-08-18 20:15:16,586 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 403.38 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 101.0 MB in the beginning and 181.9 MB in the end (delta: -81.0 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 47.90 ms. Allocated memory is still 203.9 MB. Free memory was 181.9 MB in the beginning and 179.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 514.46 ms. Allocated memory is still 203.9 MB. Free memory was 179.4 MB in the beginning and 156.1 MB in the end (delta: 23.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 739.11 ms. Allocated memory is still 203.9 MB. Free memory was 155.4 MB in the beginning and 112.8 MB in the end (delta: 42.6 MB). Peak memory consumption was 42.6 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; [L82] CALL, EXPR trunc_double(x) [L18] int signbit; [L19] int msw; [L20] unsigned int lsw; [L21] int exponent_less_1023; [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 [L30] COND FALSE !(exponent_less_1023 < 20) [L47] COND TRUE exponent_less_1023 > 51 [L48] COND TRUE exponent_less_1023 == 1024 [L49] return x + x; [L82] RET, EXPR trunc_double(x) [L82] double res = trunc_double(x); [L85] EXPR res == 0.0 && __signbit_double(res) == 0 [L85] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L86] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 44 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: 37 SDtfs, 32 SDslu, 5 SDs, 0 SdLazy, 46 SolverSat, 13 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, 0.0s 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, 0.1s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 702 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...