/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:52:52,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:52:52,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:52:53,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:52:53,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:52:53,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:52:53,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:52:53,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:52:53,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:52:53,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:52:53,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:52:53,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:52:53,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:52:53,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:52:53,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:52:53,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:52:53,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:52:53,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:52:53,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:52:53,055 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:52:53,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:52:53,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:52:53,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:52:53,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:52:53,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:52:53,077 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:52:53,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:52:53,079 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:52:53,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:52:53,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 14:52:53,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 14:52:53,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 14:52:53,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 14:52:53,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 14:52:53,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 14:52:53,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 14:52:53,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 14:52:53,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 14:52:53,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:52:53,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:52:53,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:52:53,094 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 [2020-08-21 14:52:53,134 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:52:53,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:52:53,136 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:52:53,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:52:53,137 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:52:53,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:52:53,137 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:52:53,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:52:53,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:52:53,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:52:53,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:52:53,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:52:53,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:52:53,140 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:52:53,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:52:53,140 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:52:53,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:52:53,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:52:53,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:52:53,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:52:53,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:52:53,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:52:53,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:52:53,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:52:53,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:52:53,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:52:53,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:52:53,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:52:53,143 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:52:53,143 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:52:53,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:52:53,478 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:52:53,482 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:52:53,483 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:52:53,484 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:52:53,484 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072a.c [2020-08-21 14:52:53,545 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/144115bb7/1f814d6dfb9f427e908a61abcf76a349/FLAGd10aa9a4d [2020-08-21 14:52:53,948 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:52:53,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1072a.c [2020-08-21 14:52:53,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/144115bb7/1f814d6dfb9f427e908a61abcf76a349/FLAGd10aa9a4d [2020-08-21 14:52:54,323 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/144115bb7/1f814d6dfb9f427e908a61abcf76a349 [2020-08-21 14:52:54,333 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:52:54,335 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:52:54,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:52:54,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:52:54,342 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:52:54,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:52:54" (1/1) ... [2020-08-21 14:52:54,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c8ba199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:54, skipping insertion in model container [2020-08-21 14:52:54,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:52:54" (1/1) ... [2020-08-21 14:52:54,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:52:54,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:52:54,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:52:54,639 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:52:54,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:52:54,683 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:52:54,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:54 WrapperNode [2020-08-21 14:52:54,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:52:54,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:52:54,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:52:54,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:52:54,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:54" (1/1) ... [2020-08-21 14:52:54,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:54" (1/1) ... [2020-08-21 14:52:54,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:54" (1/1) ... [2020-08-21 14:52:54,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:54" (1/1) ... [2020-08-21 14:52:54,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:54" (1/1) ... [2020-08-21 14:52:54,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:54" (1/1) ... [2020-08-21 14:52:54,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:54" (1/1) ... [2020-08-21 14:52:54,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:52:54,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:52:54,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:52:54,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:52:54,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:54" (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 [2020-08-21 14:52:54,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:52:54,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:52:54,889 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2020-08-21 14:52:54,889 INFO L138 BoogieDeclarations]: Found implementation of procedure isinf_float [2020-08-21 14:52:54,890 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:52:54,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:52:54,890 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2020-08-21 14:52:54,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 14:52:54,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-21 14:52:54,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 14:52:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 14:52:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 14:52:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-21 14:52:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure isinf_float [2020-08-21 14:52:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:52:54,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:52:54,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:52:55,184 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:52:55,185 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-08-21 14:52:55,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:52:55 BoogieIcfgContainer [2020-08-21 14:52:55,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:52:55,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:52:55,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:52:55,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:52:55,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:52:54" (1/3) ... [2020-08-21 14:52:55,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b2d4fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:52:55, skipping insertion in model container [2020-08-21 14:52:55,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:54" (2/3) ... [2020-08-21 14:52:55,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b2d4fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:52:55, skipping insertion in model container [2020-08-21 14:52:55,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:52:55" (3/3) ... [2020-08-21 14:52:55,201 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1072a.c [2020-08-21 14:52:55,216 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:52:55,227 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:52:55,261 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:52:55,298 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:52:55,298 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:52:55,299 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:52:55,299 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:52:55,299 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:52:55,299 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:52:55,299 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:52:55,300 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:52:55,320 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-08-21 14:52:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 14:52:55,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:52:55,328 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] [2020-08-21 14:52:55,328 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:52:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:52:55,334 INFO L82 PathProgramCache]: Analyzing trace with hash -456969478, now seen corresponding path program 1 times [2020-08-21 14:52:55,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:52:55,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187585778] [2020-08-21 14:52:55,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:52:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:52:55,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:52:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:52:55,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:52:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:52:55,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 14:52:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:52:55,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:52:55,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187585778] [2020-08-21 14:52:55,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:52:55,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:52:55,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659609314] [2020-08-21 14:52:55,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:52:55,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:52:55,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:52:55,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:52:55,636 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2020-08-21 14:52:55,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:52:55,810 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2020-08-21 14:52:55,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 14:52:55,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-21 14:52:55,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:52:55,821 INFO L225 Difference]: With dead ends: 66 [2020-08-21 14:52:55,821 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 14:52:55,826 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 [2020-08-21 14:52:55,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 14:52:55,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 14:52:55,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 14:52:55,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-08-21 14:52:55,870 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 24 [2020-08-21 14:52:55,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:52:55,871 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-08-21 14:52:55,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:52:55,871 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-08-21 14:52:55,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 14:52:55,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:52:55,872 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] [2020-08-21 14:52:55,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:52:55,873 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:52:55,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:52:55,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1810155496, now seen corresponding path program 1 times [2020-08-21 14:52:55,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:52:55,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48498047] [2020-08-21 14:52:55,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:52:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 14:52:55,980 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 14:52:55,980 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 14:52:55,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:52:56,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:52:56 BoogieIcfgContainer [2020-08-21 14:52:56,004 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:52:56,007 INFO L168 Benchmark]: Toolchain (without parser) took 1671.45 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 103.1 MB in the beginning and 117.8 MB in the end (delta: -14.7 MB). Peak memory consumption was 41.4 MB. Max. memory is 7.1 GB. [2020-08-21 14:52:56,008 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 14:52:56,009 INFO L168 Benchmark]: CACSL2BoogieTranslator took 345.11 ms. Allocated memory is still 147.3 MB. Free memory was 102.7 MB in the beginning and 92.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-08-21 14:52:56,010 INFO L168 Benchmark]: Boogie Preprocessor took 139.83 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 92.0 MB in the beginning and 180.6 MB in the end (delta: -88.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-21 14:52:56,011 INFO L168 Benchmark]: RCFGBuilder took 365.99 ms. Allocated memory is still 203.4 MB. Free memory was 180.6 MB in the beginning and 160.8 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-08-21 14:52:56,012 INFO L168 Benchmark]: TraceAbstraction took 813.36 ms. Allocated memory is still 203.4 MB. Free memory was 160.1 MB in the beginning and 117.8 MB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2020-08-21 14:52:56,016 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 345.11 ms. Allocated memory is still 147.3 MB. Free memory was 102.7 MB in the beginning and 92.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 139.83 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 92.0 MB in the beginning and 180.6 MB in the end (delta: -88.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 365.99 ms. Allocated memory is still 203.4 MB. Free memory was 180.6 MB in the beginning and 160.8 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 813.36 ms. Allocated memory is still 203.4 MB. Free memory was 160.1 MB in the beginning and 117.8 MB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 67]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryArithmeticFLOAToperation at line 38, overapproximation of bitwiseAnd at line 51. Possible FailurePath: [L62] float x = 1.0f / 0.0f; [L63] CALL, EXPR trunc_float(x) [L13] __int32_t signbit, w, exponent_less_127; [L15] ieee_float_shape_type gf_u; [L16] gf_u.value = (x) [L17] EXPR gf_u.word [L17] (w) = gf_u.word [L19] signbit = w & 0x80000000 [L20] exponent_less_127 = ((w & 0x7f800000) >> 23) - 127 [L21] COND FALSE !(exponent_less_127 < 23) [L37] COND TRUE exponent_less_127 == 255 [L38] return x + x; [L63] RET, EXPR trunc_float(x) [L63] float res = trunc_float(x); [L66] CALL, EXPR isinf_float(res) [L45] __int32_t ix; [L47] ieee_float_shape_type gf_u; [L48] gf_u.value = (x) [L49] EXPR gf_u.word [L49] (ix) = gf_u.word [L51] ix &= 0x7fffffff [L52] return ((ix) == 0x7f800000L); [L66] RET, EXPR isinf_float(res) [L66] COND TRUE !isinf_float(res) [L67] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 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: 32 SDtfs, 27 SDslu, 5 SDs, 0 SdLazy, 39 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred 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, 50 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 1288 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...