/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --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_1032b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 02:59:46,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 02:59:46,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 02:59:46,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 02:59:46,195 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 02:59:46,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 02:59:46,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 02:59:46,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 02:59:46,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 02:59:46,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 02:59:46,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 02:59:46,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 02:59:46,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 02:59:46,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 02:59:46,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 02:59:46,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 02:59:46,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 02:59:46,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 02:59:46,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 02:59:46,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 02:59:46,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 02:59:46,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 02:59:46,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 02:59:46,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 02:59:46,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 02:59:46,260 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 02:59:46,260 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 02:59:46,261 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 02:59:46,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 02:59:46,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 02:59:46,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 02:59:46,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 02:59:46,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 02:59:46,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 02:59:46,270 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 02:59:46,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 02:59:46,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 02:59:46,271 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 02:59:46,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 02:59:46,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 02:59:46,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 02:59:46,277 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 [2020-08-22 02:59:46,316 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 02:59:46,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 02:59:46,318 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 02:59:46,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 02:59:46,319 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 02:59:46,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 02:59:46,319 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 02:59:46,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 02:59:46,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 02:59:46,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 02:59:46,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 02:59:46,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 02:59:46,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 02:59:46,322 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 02:59:46,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 02:59:46,322 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 02:59:46,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 02:59:46,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 02:59:46,323 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 02:59:46,323 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 02:59:46,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 02:59:46,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:59:46,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 02:59:46,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 02:59:46,324 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 02:59:46,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 02:59:46,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 02:59:46,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 02:59:46,325 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 02:59:46,325 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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-08-22 02:59:46,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 02:59:46,619 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 02:59:46,622 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 02:59:46,623 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 02:59:46,624 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 02:59:46,624 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032b.c [2020-08-22 02:59:46,682 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52dd98a3f/f4edcd381c4a4641bfbfa36ba4824124/FLAGf84a1d95a [2020-08-22 02:59:47,144 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 02:59:47,145 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1032b.c [2020-08-22 02:59:47,155 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52dd98a3f/f4edcd381c4a4641bfbfa36ba4824124/FLAGf84a1d95a [2020-08-22 02:59:47,520 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52dd98a3f/f4edcd381c4a4641bfbfa36ba4824124 [2020-08-22 02:59:47,528 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 02:59:47,530 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 02:59:47,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 02:59:47,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 02:59:47,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 02:59:47,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:59:47" (1/1) ... [2020-08-22 02:59:47,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34e5dc27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:59:47, skipping insertion in model container [2020-08-22 02:59:47,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:59:47" (1/1) ... [2020-08-22 02:59:47,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 02:59:47,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 02:59:47,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:59:47,764 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 02:59:47,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:59:47,896 INFO L208 MainTranslator]: Completed translation [2020-08-22 02:59:47,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:59:47 WrapperNode [2020-08-22 02:59:47,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 02:59:47,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 02:59:47,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 02:59:47,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 02:59:47,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:59:47" (1/1) ... [2020-08-22 02:59:47,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:59:47" (1/1) ... [2020-08-22 02:59:47,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:59:47" (1/1) ... [2020-08-22 02:59:47,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:59:47" (1/1) ... [2020-08-22 02:59:47,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:59:47" (1/1) ... [2020-08-22 02:59:47,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:59:47" (1/1) ... [2020-08-22 02:59:47,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:59:47" (1/1) ... [2020-08-22 02:59:47,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 02:59:47,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 02:59:47,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 02:59:47,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 02:59:47,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:59:47" (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 [2020-08-22 02:59:48,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 02:59:48,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 02:59:48,016 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2020-08-22 02:59:48,017 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-22 02:59:48,017 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 02:59:48,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 02:59:48,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-22 02:59:48,017 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2020-08-22 02:59:48,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 02:59:48,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-22 02:59:48,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 02:59:48,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 02:59:48,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 02:59:48,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-22 02:59:48,018 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-22 02:59:48,018 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 02:59:48,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 02:59:48,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 02:59:48,383 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 02:59:48,383 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-08-22 02:59:48,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:59:48 BoogieIcfgContainer [2020-08-22 02:59:48,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 02:59:48,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 02:59:48,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 02:59:48,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 02:59:48,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 02:59:47" (1/3) ... [2020-08-22 02:59:48,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540b1343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:59:48, skipping insertion in model container [2020-08-22 02:59:48,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:59:47" (2/3) ... [2020-08-22 02:59:48,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540b1343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:59:48, skipping insertion in model container [2020-08-22 02:59:48,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:59:48" (3/3) ... [2020-08-22 02:59:48,396 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1032b.c [2020-08-22 02:59:48,406 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 02:59:48,414 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 02:59:48,429 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 02:59:48,451 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 02:59:48,451 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 02:59:48,452 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 02:59:48,452 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 02:59:48,452 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 02:59:48,452 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 02:59:48,452 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 02:59:48,453 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 02:59:48,472 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-22 02:59:48,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 02:59:48,479 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:59:48,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:59:48,480 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:59:48,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:59:48,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1483749764, now seen corresponding path program 1 times [2020-08-22 02:59:48,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:59:48,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420421032] [2020-08-22 02:59:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:59:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:59:48,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:59:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:59:48,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:59:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:59:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:59:48,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420421032] [2020-08-22 02:59:48,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:59:48,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:59:48,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974725165] [2020-08-22 02:59:48,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:59:48,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:59:48,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:59:48,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:59:48,726 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2020-08-22 02:59:48,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:59:48,938 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2020-08-22 02:59:48,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 02:59:48,940 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-08-22 02:59:48,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:59:48,951 INFO L225 Difference]: With dead ends: 68 [2020-08-22 02:59:48,951 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 02:59:48,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:59:48,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 02:59:48,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-08-22 02:59:48,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 02:59:48,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-08-22 02:59:48,999 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2020-08-22 02:59:48,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:59:48,999 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-08-22 02:59:49,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:59:49,000 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-08-22 02:59:49,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 02:59:49,001 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:59:49,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:59:49,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 02:59:49,002 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:59:49,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:59:49,002 INFO L82 PathProgramCache]: Analyzing trace with hash 262345377, now seen corresponding path program 1 times [2020-08-22 02:59:49,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:59:49,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073078164] [2020-08-22 02:59:49,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:59:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 02:59:49,059 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 02:59:49,059 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 02:59:49,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 02:59:49,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 02:59:49 BoogieIcfgContainer [2020-08-22 02:59:49,080 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 02:59:49,083 INFO L168 Benchmark]: Toolchain (without parser) took 1551.86 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 103.8 MB in the beginning and 119.9 MB in the end (delta: -16.2 MB). Peak memory consumption was 47.3 MB. Max. memory is 7.1 GB. [2020-08-22 02:59:49,084 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 02:59:49,085 INFO L168 Benchmark]: CACSL2BoogieTranslator took 364.48 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 103.6 MB in the beginning and 183.3 MB in the end (delta: -79.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2020-08-22 02:59:49,086 INFO L168 Benchmark]: Boogie Preprocessor took 59.83 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 181.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-22 02:59:49,087 INFO L168 Benchmark]: RCFGBuilder took 429.93 ms. Allocated memory is still 204.5 MB. Free memory was 181.0 MB in the beginning and 161.7 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. [2020-08-22 02:59:49,088 INFO L168 Benchmark]: TraceAbstraction took 691.06 ms. Allocated memory is still 204.5 MB. Free memory was 161.1 MB in the beginning and 119.9 MB in the end (delta: 41.1 MB). Peak memory consumption was 41.1 MB. Max. memory is 7.1 GB. [2020-08-22 02:59:49,092 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 364.48 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 103.6 MB in the beginning and 183.3 MB in the end (delta: -79.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 59.83 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 181.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 429.93 ms. Allocated memory is still 204.5 MB. Free memory was 181.0 MB in the beginning and 161.7 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 691.06 ms. Allocated memory is still 204.5 MB. Free memory was 161.1 MB in the beginning and 119.9 MB in the end (delta: 41.1 MB). Peak memory consumption was 41.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 80]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 79, overapproximation of bitwiseAnd at line 23, overapproximation of someUnaryFLOAToperation at line 75, overapproximation of someBinaryArithmeticFLOAToperation at line 43. Possible FailurePath: [L75] float x = -0.0f; [L76] CALL, EXPR round_float(x) [L13] __uint32_t w; [L15] int exponent_less_127; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] exponent_less_127 = (int)((w & 0x7f800000) >> 23) - 127 [L25] COND FALSE !(exponent_less_127 < 23) [L41] COND TRUE exponent_less_127 == 128 [L43] return x + x; [L76] RET, EXPR round_float(x) [L76] float res = round_float(x); [L79] EXPR res == -0.0f && __signbit_float(res) == 1 [L79] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L80] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 37 SDtfs, 32 SDslu, 5 SDs, 0 SdLazy, 42 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 646 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...