/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=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1211a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:02:20,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:02:20,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:02:20,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:02:20,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:02:20,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:02:20,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:02:20,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:02:20,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:02:20,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:02:20,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:02:20,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:02:20,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:02:20,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:02:20,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:02:20,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:02:20,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:02:20,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:02:20,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:02:20,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:02:20,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:02:20,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:02:20,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:02:20,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:02:20,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:02:21,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:02:21,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:02:21,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:02:21,011 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 17:02:21,051 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:02:21,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:02:21,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:02:21,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:02:21,054 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:02:21,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:02:21,054 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:02:21,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:02:21,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:02:21,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:02:21,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:02:21,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:02:21,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:02:21,057 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:02:21,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:02:21,057 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:02:21,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:02:21,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:02:21,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:02:21,058 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:02:21,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:02:21,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:02:21,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:02:21,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:02:21,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:02:21,059 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:02:21,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:02:21,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:02:21,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:02:21,060 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=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 17:02:21,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:02:21,395 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:02:21,401 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:02:21,403 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:02:21,403 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:02:21,404 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1211a.c [2020-08-18 17:02:21,477 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/410792e38/07a49ced3ba6491e86befbe4daf01121/FLAGffcb76897 [2020-08-18 17:02:21,902 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:02:21,903 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1211a.c [2020-08-18 17:02:21,913 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/410792e38/07a49ced3ba6491e86befbe4daf01121/FLAGffcb76897 [2020-08-18 17:02:22,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/410792e38/07a49ced3ba6491e86befbe4daf01121 [2020-08-18 17:02:22,279 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:02:22,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:02:22,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:02:22,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:02:22,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:02:22,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:02:22" (1/1) ... [2020-08-18 17:02:22,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cb59baf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:22, skipping insertion in model container [2020-08-18 17:02:22,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:02:22" (1/1) ... [2020-08-18 17:02:22,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:02:22,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:02:22,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:02:22,649 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:02:22,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:02:22,830 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:02:22,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:22 WrapperNode [2020-08-18 17:02:22,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:02:22,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:02:22,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:02:22,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:02:22,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:22" (1/1) ... [2020-08-18 17:02:22,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:22" (1/1) ... [2020-08-18 17:02:22,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:22" (1/1) ... [2020-08-18 17:02:22,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:22" (1/1) ... [2020-08-18 17:02:22,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:22" (1/1) ... [2020-08-18 17:02:22,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:22" (1/1) ... [2020-08-18 17:02:22,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:22" (1/1) ... [2020-08-18 17:02:22,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:02:22,906 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:02:22,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:02:22,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:02:22,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:22" (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 17:02:22,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:02:22,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:02:22,964 INFO L138 BoogieDeclarations]: Found implementation of procedure modf_float [2020-08-18 17:02:22,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-18 17:02:22,964 INFO L138 BoogieDeclarations]: Found implementation of procedure isinf_float [2020-08-18 17:02:22,964 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:02:22,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:02:22,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-18 17:02:22,965 INFO L130 BoogieDeclarations]: Found specification of procedure modf_float [2020-08-18 17:02:22,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 17:02:22,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 17:02:22,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 17:02:22,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 17:02:22,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 17:02:22,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 17:02:22,966 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-18 17:02:22,966 INFO L130 BoogieDeclarations]: Found specification of procedure isinf_float [2020-08-18 17:02:22,966 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:02:22,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-08-18 17:02:22,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:02:22,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:02:23,503 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:02:23,503 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-08-18 17:02:23,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:02:23 BoogieIcfgContainer [2020-08-18 17:02:23,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:02:23,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:02:23,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:02:23,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:02:23,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:02:22" (1/3) ... [2020-08-18 17:02:23,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561ffbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:02:23, skipping insertion in model container [2020-08-18 17:02:23,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:22" (2/3) ... [2020-08-18 17:02:23,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561ffbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:02:23, skipping insertion in model container [2020-08-18 17:02:23,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:02:23" (3/3) ... [2020-08-18 17:02:23,517 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1211a.c [2020-08-18 17:02:23,528 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:02:23,536 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:02:23,549 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:02:23,576 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:02:23,577 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:02:23,577 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:02:23,577 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:02:23,578 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:02:23,578 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:02:23,578 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:02:23,578 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:02:23,600 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-08-18 17:02:23,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 17:02:23,608 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:23,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:23,610 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:23,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:23,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1328912444, now seen corresponding path program 1 times [2020-08-18 17:02:23,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:23,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387264572] [2020-08-18 17:02:23,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:23,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:23,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:02:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:23,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 17:02:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:23,858 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 17:02:23,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387264572] [2020-08-18 17:02:23,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:02:23,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:02:23,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029704850] [2020-08-18 17:02:23,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:02:23,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:23,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:02:23,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:02:23,886 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 4 states. [2020-08-18 17:02:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:02:24,136 INFO L93 Difference]: Finished difference Result 110 states and 158 transitions. [2020-08-18 17:02:24,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:02:24,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-08-18 17:02:24,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:02:24,150 INFO L225 Difference]: With dead ends: 110 [2020-08-18 17:02:24,150 INFO L226 Difference]: Without dead ends: 55 [2020-08-18 17:02:24,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 17:02:24,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-18 17:02:24,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-18 17:02:24,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 17:02:24,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-08-18 17:02:24,206 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 27 [2020-08-18 17:02:24,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:02:24,207 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-08-18 17:02:24,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:02:24,207 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-08-18 17:02:24,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 17:02:24,209 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:24,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:24,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:02:24,210 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:24,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:24,210 INFO L82 PathProgramCache]: Analyzing trace with hash -2017954314, now seen corresponding path program 1 times [2020-08-18 17:02:24,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:24,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995595187] [2020-08-18 17:02:24,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:24,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:24,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:02:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:24,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:02:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:24,398 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 17:02:24,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995595187] [2020-08-18 17:02:24,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:02:24,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:02:24,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853899634] [2020-08-18 17:02:24,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:02:24,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:24,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:02:24,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:02:24,408 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 5 states. [2020-08-18 17:02:24,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:02:24,637 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-08-18 17:02:24,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:02:24,637 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-18 17:02:24,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:02:24,639 INFO L225 Difference]: With dead ends: 58 [2020-08-18 17:02:24,639 INFO L226 Difference]: Without dead ends: 55 [2020-08-18 17:02:24,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:02:24,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-18 17:02:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-18 17:02:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 17:02:24,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-08-18 17:02:24,651 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 30 [2020-08-18 17:02:24,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:02:24,652 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-08-18 17:02:24,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:02:24,652 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-08-18 17:02:24,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-18 17:02:24,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:24,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:24,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:02:24,654 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:24,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:24,655 INFO L82 PathProgramCache]: Analyzing trace with hash 2060718957, now seen corresponding path program 1 times [2020-08-18 17:02:24,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:24,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511523369] [2020-08-18 17:02:24,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:02:24,713 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:02:24,713 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:02:24,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:02:24,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:02:24 BoogieIcfgContainer [2020-08-18 17:02:24,749 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:02:24,753 INFO L168 Benchmark]: Toolchain (without parser) took 2470.60 ms. Allocated memory was 141.0 MB in the beginning and 235.4 MB in the end (delta: 94.4 MB). Free memory was 104.1 MB in the beginning and 169.9 MB in the end (delta: -65.8 MB). Peak memory consumption was 28.5 MB. Max. memory is 7.1 GB. [2020-08-18 17:02:24,755 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 17:02:24,756 INFO L168 Benchmark]: CACSL2BoogieTranslator took 550.26 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 103.7 MB in the beginning and 182.1 MB in the end (delta: -78.4 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:02:24,757 INFO L168 Benchmark]: Boogie Preprocessor took 71.70 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 179.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-18 17:02:24,758 INFO L168 Benchmark]: RCFGBuilder took 602.71 ms. Allocated memory is still 203.9 MB. Free memory was 179.2 MB in the beginning and 150.8 MB in the end (delta: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:02:24,760 INFO L168 Benchmark]: TraceAbstraction took 1239.67 ms. Allocated memory was 203.9 MB in the beginning and 235.4 MB in the end (delta: 31.5 MB). Free memory was 150.1 MB in the beginning and 169.9 MB in the end (delta: -19.8 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-08-18 17:02:24,770 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 550.26 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 103.7 MB in the beginning and 182.1 MB in the end (delta: -78.4 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 71.70 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 179.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 602.71 ms. Allocated memory is still 203.9 MB. Free memory was 179.2 MB in the beginning and 150.8 MB in the end (delta: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1239.67 ms. Allocated memory was 203.9 MB in the beginning and 235.4 MB in the end (delta: 31.5 MB). Free memory was 150.1 MB in the beginning and 169.9 MB in the end (delta: -19.8 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 110]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 109, overapproximation of someBinaryArithmeticFLOAToperation at line 104, overapproximation of bitwiseAnd at line 93. Possible FailurePath: [L12] static const float one_modf = 1.0; [L104] float x = 1.0f / 0.0f; [L105] float iptr = __VERIFIER_nondet_float(); [L106] CALL, EXPR modf_float(x, &iptr) [L15] __int32_t i0, j0; [L16] __uint32_t i; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (i0) = gf_u.word [L22] j0 = ((i0 >> 23) & 0xff) - 0x7f [L23] COND TRUE j0 < 23 [L24] COND TRUE j0 < 0 [L26] ieee_float_shape_type sf_u; [L27] sf_u.word = (i0 & 0x80000000) [L28] EXPR sf_u.value [L28] (*iptr) = sf_u.value [L30] return x; [L106] RET, EXPR modf_float(x, &iptr) [L106] float res = modf_float(x, &iptr); [L109] EXPR \read(iptr) [L109] CALL, EXPR isinf_float(iptr) [L87] __int32_t ix; [L89] ieee_float_shape_type gf_u; [L90] gf_u.value = (x) [L91] EXPR gf_u.word [L91] (ix) = gf_u.word [L93] ix &= 0x7fffffff [L94] return ((ix) == 0x7f800000L); [L109] RET, EXPR isinf_float(iptr) [L109] isinf_float(iptr) && !(res == 0.0f && __signbit_float(res) == 0) [L109] EXPR res == 0.0f && __signbit_float(res) == 0 [L109] isinf_float(iptr) && !(res == 0.0f && __signbit_float(res) == 0) [L109] COND TRUE isinf_float(iptr) && !(res == 0.0f && __signbit_float(res) == 0) [L110] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 100 SDtfs, 62 SDslu, 44 SDs, 0 SdLazy, 180 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 89 NumberOfCodeBlocks, 89 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 3526 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...