/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1071.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 14:54:05,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 14:54:05,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 14:54:05,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 14:54:05,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 14:54:05,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 14:54:05,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 14:54:05,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 14:54:05,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 14:54:05,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 14:54:05,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 14:54:05,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 14:54:05,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:54:05,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:54:05,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:54:05,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:54:05,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:54:05,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:54:05,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:54:05,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:54:05,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:54:05,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:54:05,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:54:05,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:54:05,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 14:54:05,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 14:54:05,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 14:54:05,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 14:54:05,842 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 14:54:05,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 14:54:05,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 14:54:05,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 14:54:05,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 14:54:05,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 14:54:05,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 14:54:05,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 14:54:05,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 14:54:05,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 14:54:05,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:54:05,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:54:05,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:54:05,852 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 [2020-09-24 14:54:05,896 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:54:05,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:54:05,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:54:05,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:54:05,899 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:54:05,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:54:05,900 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:54:05,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:54:05,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:54:05,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:54:05,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:54:05,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:54:05,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:54:05,902 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:54:05,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:54:05,902 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:54:05,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:54:05,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:54:05,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:54:05,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:54:05,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:54:05,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:54:05,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:54:05,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:54:05,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:54:05,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:54:05,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:54:05,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:54:05,906 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:54:05,906 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 14:54:06,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:54:06,488 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:54:06,493 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:54:06,495 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:54:06,495 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:54:06,497 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1071.c [2020-09-24 14:54:06,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e70b9480/c57e39b708e5476c84871c49de5ae78a/FLAG4636f8eca [2020-09-24 14:54:07,091 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:54:07,092 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1071.c [2020-09-24 14:54:07,102 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e70b9480/c57e39b708e5476c84871c49de5ae78a/FLAG4636f8eca [2020-09-24 14:54:07,421 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e70b9480/c57e39b708e5476c84871c49de5ae78a [2020-09-24 14:54:07,435 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:54:07,442 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:54:07,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:54:07,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:54:07,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:54:07,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:54:07" (1/1) ... [2020-09-24 14:54:07,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cdd711c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07, skipping insertion in model container [2020-09-24 14:54:07,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:54:07" (1/1) ... [2020-09-24 14:54:07,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:54:07,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:54:07,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:54:07,796 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:54:07,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:54:07,947 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:54:07,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07 WrapperNode [2020-09-24 14:54:07,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:54:07,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:54:07,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:54:07,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:54:07,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07" (1/1) ... [2020-09-24 14:54:07,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07" (1/1) ... [2020-09-24 14:54:07,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07" (1/1) ... [2020-09-24 14:54:07,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07" (1/1) ... [2020-09-24 14:54:07,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07" (1/1) ... [2020-09-24 14:54:07,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07" (1/1) ... [2020-09-24 14:54:07,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07" (1/1) ... [2020-09-24 14:54:07,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:54:07,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:54:07,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:54:07,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:54:07,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07" (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 [2020-09-24 14:54:08,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:54:08,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:54:08,072 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2020-09-24 14:54:08,072 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-09-24 14:54:08,072 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:54:08,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:54:08,072 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2020-09-24 14:54:08,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 14:54:08,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-24 14:54:08,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 14:54:08,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 14:54:08,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 14:54:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-24 14:54:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-09-24 14:54:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:54:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:54:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:54:08,527 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:54:08,528 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-24 14:54:08,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:54:08 BoogieIcfgContainer [2020-09-24 14:54:08,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:54:08,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:54:08,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:54:08,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:54:08,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:54:07" (1/3) ... [2020-09-24 14:54:08,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7369ad71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:54:08, skipping insertion in model container [2020-09-24 14:54:08,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07" (2/3) ... [2020-09-24 14:54:08,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7369ad71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:54:08, skipping insertion in model container [2020-09-24 14:54:08,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:54:08" (3/3) ... [2020-09-24 14:54:08,545 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1071.c [2020-09-24 14:54:08,562 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:54:08,573 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 14:54:08,597 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 14:54:08,625 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:54:08,625 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:54:08,625 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:54:08,626 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:54:08,626 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:54:08,626 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:54:08,626 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:54:08,626 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:54:08,648 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2020-09-24 14:54:08,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-24 14:54:08,656 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:08,658 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] [2020-09-24 14:54:08,658 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:08,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:08,665 INFO L82 PathProgramCache]: Analyzing trace with hash 641961910, now seen corresponding path program 1 times [2020-09-24 14:54:08,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:08,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2291352] [2020-09-24 14:54:08,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:08,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:08,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:54:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:08,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 14:54:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:54:08,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2291352] [2020-09-24 14:54:08,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:54:08,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:54:08,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168534120] [2020-09-24 14:54:08,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:54:08,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:08,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:54:08,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:54:08,980 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 4 states. [2020-09-24 14:54:09,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:09,254 INFO L93 Difference]: Finished difference Result 128 states and 146 transitions. [2020-09-24 14:54:09,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 14:54:09,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-09-24 14:54:09,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:09,270 INFO L225 Difference]: With dead ends: 128 [2020-09-24 14:54:09,271 INFO L226 Difference]: Without dead ends: 64 [2020-09-24 14:54:09,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:54:09,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-24 14:54:09,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-09-24 14:54:09,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-24 14:54:09,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-24 14:54:09,333 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 32 [2020-09-24 14:54:09,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:09,334 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-24 14:54:09,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:54:09,334 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-24 14:54:09,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 14:54:09,336 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:09,336 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:09,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:54:09,337 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:09,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:09,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1381088133, now seen corresponding path program 1 times [2020-09-24 14:54:09,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:09,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947865094] [2020-09-24 14:54:09,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 14:54:09,459 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 14:54:09,459 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 14:54:09,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:54:09,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 02:54:09 BoogieIcfgContainer [2020-09-24 14:54:09,501 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 14:54:09,506 INFO L168 Benchmark]: Toolchain (without parser) took 2067.06 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 102.9 MB in the beginning and 108.9 MB in the end (delta: -5.9 MB). Peak memory consumption was 49.6 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:09,509 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 14:54:09,512 INFO L168 Benchmark]: CACSL2BoogieTranslator took 504.92 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 102.2 MB in the beginning and 180.7 MB in the end (delta: -78.4 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:09,513 INFO L168 Benchmark]: Boogie Preprocessor took 47.60 ms. Allocated memory is still 201.9 MB. Free memory was 180.7 MB in the beginning and 178.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:09,514 INFO L168 Benchmark]: RCFGBuilder took 538.20 ms. Allocated memory is still 201.9 MB. Free memory was 178.6 MB in the beginning and 156.7 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:09,515 INFO L168 Benchmark]: TraceAbstraction took 965.90 ms. Allocated memory is still 201.9 MB. Free memory was 156.0 MB in the beginning and 108.9 MB in the end (delta: 47.1 MB). Peak memory consumption was 47.1 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:09,520 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 504.92 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 102.2 MB in the beginning and 180.7 MB in the end (delta: -78.4 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 47.60 ms. Allocated memory is still 201.9 MB. Free memory was 180.7 MB in the beginning and 178.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 538.20 ms. Allocated memory is still 201.9 MB. Free memory was 178.6 MB in the beginning and 156.7 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 965.90 ms. Allocated memory is still 201.9 MB. Free memory was 156.0 MB in the beginning and 108.9 MB in the end (delta: 47.1 MB). Peak memory consumption was 47.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 57]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 44, overapproximation of someBinaryArithmeticFLOAToperation at line 38, overapproximation of bitwiseAnd at line 20. Possible FailurePath: [L52] float x = 0.0f / 0.0f; [L53] 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; [L53] RET, EXPR trunc_float(x) [L53] float res = trunc_float(x); [L56] CALL, EXPR isnan_float(res) [L44] return x != x; [L56] RET, EXPR isnan_float(res) [L56] COND TRUE !isnan_float(res) [L57] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 71 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 70 SDtfs, 17 SDslu, 44 SDs, 0 SdLazy, 77 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 73 NumberOfCodeBlocks, 73 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 31 ConstructedInterpolants, 0 QuantifiedInterpolants, 1612 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...