/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_1211b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 14:54:12,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 14:54:12,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 14:54:12,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 14:54:12,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 14:54:12,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 14:54:12,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 14:54:12,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 14:54:12,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 14:54:12,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 14:54:12,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 14:54:12,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 14:54:12,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:54:12,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:54:12,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:54:12,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:54:12,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:54:12,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:54:12,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:54:12,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:54:12,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:54:12,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:54:12,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:54:12,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:54:12,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 14:54:12,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 14:54:12,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 14:54:12,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 14:54:12,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 14:54:12,431 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-24 14:54:12,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:54:12,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:54:12,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:54:12,441 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 14:54:12,476 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:54:12,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:54:12,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:54:12,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:54:12,478 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:54:12,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:54:12,478 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:54:12,479 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:54:12,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:54:12,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:54:12,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:54:12,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:54:12,480 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:54:12,480 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:54:12,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:54:12,480 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:54:12,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:54:12,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:54:12,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:54:12,481 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:54:12,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:54:12,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:54:12,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:54:12,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:54:12,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:54:12,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:54:12,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:54:12,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:54:12,483 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:54:12,483 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 14:54:12,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:54:13,008 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:54:13,015 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:54:13,017 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:54:13,018 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:54:13,019 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1211b.c [2020-09-24 14:54:13,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2427d61fc/8964b47c7eb84ffd9ed16d6e39390e1b/FLAG97af5c2ed [2020-09-24 14:54:13,658 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:54:13,661 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1211b.c [2020-09-24 14:54:13,672 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2427d61fc/8964b47c7eb84ffd9ed16d6e39390e1b/FLAG97af5c2ed [2020-09-24 14:54:14,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2427d61fc/8964b47c7eb84ffd9ed16d6e39390e1b [2020-09-24 14:54:14,117 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:54:14,122 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:54:14,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:54:14,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:54:14,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:54:14,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:54:14" (1/1) ... [2020-09-24 14:54:14,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f159ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:14, skipping insertion in model container [2020-09-24 14:54:14,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:54:14" (1/1) ... [2020-09-24 14:54:14,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:54:14,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:54:14,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:54:14,532 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:54:14,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:54:14,710 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:54:14,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:14 WrapperNode [2020-09-24 14:54:14,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:54:14,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:54:14,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:54:14,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:54:14,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:14" (1/1) ... [2020-09-24 14:54:14,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:14" (1/1) ... [2020-09-24 14:54:14,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:14" (1/1) ... [2020-09-24 14:54:14,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:14" (1/1) ... [2020-09-24 14:54:14,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:14" (1/1) ... [2020-09-24 14:54:14,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:14" (1/1) ... [2020-09-24 14:54:14,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:14" (1/1) ... [2020-09-24 14:54:14,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:54:14,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:54:14,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:54:14,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:54:14,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:14" (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 14:54:14,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:54:14,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:54:14,863 INFO L138 BoogieDeclarations]: Found implementation of procedure modf_float [2020-09-24 14:54:14,863 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-09-24 14:54:14,863 INFO L138 BoogieDeclarations]: Found implementation of procedure isinf_float [2020-09-24 14:54:14,864 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:54:14,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:54:14,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-09-24 14:54:14,864 INFO L130 BoogieDeclarations]: Found specification of procedure modf_float [2020-09-24 14:54:14,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 14:54:14,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-24 14:54:14,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 14:54:14,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 14:54:14,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 14:54:14,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-24 14:54:14,867 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-09-24 14:54:14,868 INFO L130 BoogieDeclarations]: Found specification of procedure isinf_float [2020-09-24 14:54:14,868 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:54:14,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-09-24 14:54:14,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:54:14,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:54:15,524 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:54:15,525 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-09-24 14:54:15,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:54:15 BoogieIcfgContainer [2020-09-24 14:54:15,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:54:15,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:54:15,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:54:15,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:54:15,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:54:14" (1/3) ... [2020-09-24 14:54:15,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0d99b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:54:15, skipping insertion in model container [2020-09-24 14:54:15,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:14" (2/3) ... [2020-09-24 14:54:15,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0d99b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:54:15, skipping insertion in model container [2020-09-24 14:54:15,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:54:15" (3/3) ... [2020-09-24 14:54:15,545 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1211b.c [2020-09-24 14:54:15,558 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:54:15,571 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 14:54:15,596 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 14:54:15,634 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:54:15,634 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:54:15,634 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:54:15,635 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:54:15,635 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:54:15,635 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:54:15,635 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:54:15,635 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:54:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states. [2020-09-24 14:54:15,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 14:54:15,681 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:15,683 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, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:15,684 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:15,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:15,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1432903932, now seen corresponding path program 1 times [2020-09-24 14:54:15,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:15,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211368558] [2020-09-24 14:54:15,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:15,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:15,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:15,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-24 14:54:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:16,006 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 14:54:16,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211368558] [2020-09-24 14:54:16,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:54:16,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:54:16,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69616930] [2020-09-24 14:54:16,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:54:16,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:16,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:54:16,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:54:16,042 INFO L87 Difference]: Start difference. First operand 168 states. Second operand 4 states. [2020-09-24 14:54:16,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:16,624 INFO L93 Difference]: Finished difference Result 315 states and 363 transitions. [2020-09-24 14:54:16,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 14:54:16,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-09-24 14:54:16,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:16,640 INFO L225 Difference]: With dead ends: 315 [2020-09-24 14:54:16,640 INFO L226 Difference]: Without dead ends: 153 [2020-09-24 14:54:16,645 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 [2020-09-24 14:54:16,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-24 14:54:16,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2020-09-24 14:54:16,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-24 14:54:16,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2020-09-24 14:54:16,702 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 47 [2020-09-24 14:54:16,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:16,702 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2020-09-24 14:54:16,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:54:16,702 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2020-09-24 14:54:16,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-24 14:54:16,706 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:16,706 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, 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 14:54:16,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:54:16,707 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:16,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:16,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1562102553, now seen corresponding path program 1 times [2020-09-24 14:54:16,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:16,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330158163] [2020-09-24 14:54:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:16,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:16,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:16,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 14:54:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:16,918 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 14:54:16,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330158163] [2020-09-24 14:54:16,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:54:16,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 14:54:16,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410434032] [2020-09-24 14:54:16,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 14:54:16,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:16,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 14:54:16,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:54:16,925 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand 5 states. [2020-09-24 14:54:17,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:17,257 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2020-09-24 14:54:17,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:54:17,258 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-09-24 14:54:17,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:17,262 INFO L225 Difference]: With dead ends: 161 [2020-09-24 14:54:17,264 INFO L226 Difference]: Without dead ends: 153 [2020-09-24 14:54:17,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:54:17,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-24 14:54:17,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2020-09-24 14:54:17,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-24 14:54:17,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2020-09-24 14:54:17,300 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 72 [2020-09-24 14:54:17,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:17,301 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2020-09-24 14:54:17,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 14:54:17,301 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2020-09-24 14:54:17,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-24 14:54:17,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:17,308 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, 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 14:54:17,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:54:17,309 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:17,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:17,309 INFO L82 PathProgramCache]: Analyzing trace with hash 934667084, now seen corresponding path program 1 times [2020-09-24 14:54:17,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:17,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758601803] [2020-09-24 14:54:17,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 14:54:17,474 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 14:54:17,474 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 14:54:17,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 14:54:17,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 02:54:17 BoogieIcfgContainer [2020-09-24 14:54:17,529 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 14:54:17,533 INFO L168 Benchmark]: Toolchain (without parser) took 3412.28 ms. Allocated memory was 138.4 MB in the beginning and 231.2 MB in the end (delta: 92.8 MB). Free memory was 101.3 MB in the beginning and 112.7 MB in the end (delta: -11.4 MB). Peak memory consumption was 81.4 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:17,534 INFO L168 Benchmark]: CDTParser took 0.50 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 14:54:17,535 INFO L168 Benchmark]: CACSL2BoogieTranslator took 587.55 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 100.6 MB in the beginning and 176.9 MB in the end (delta: -76.2 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:17,536 INFO L168 Benchmark]: Boogie Preprocessor took 65.94 ms. Allocated memory is still 200.3 MB. Free memory was 176.9 MB in the beginning and 174.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:17,537 INFO L168 Benchmark]: RCFGBuilder took 755.38 ms. Allocated memory is still 200.3 MB. Free memory was 174.8 MB in the beginning and 136.8 MB in the end (delta: 38.1 MB). Peak memory consumption was 38.1 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:17,538 INFO L168 Benchmark]: TraceAbstraction took 1994.46 ms. Allocated memory was 200.3 MB in the beginning and 231.2 MB in the end (delta: 30.9 MB). Free memory was 136.1 MB in the beginning and 112.7 MB in the end (delta: 23.4 MB). Peak memory consumption was 54.3 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:17,542 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 587.55 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 100.6 MB in the beginning and 176.9 MB in the end (delta: -76.2 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 65.94 ms. Allocated memory is still 200.3 MB. Free memory was 176.9 MB in the beginning and 174.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 755.38 ms. Allocated memory is still 200.3 MB. Free memory was 174.8 MB in the beginning and 136.8 MB in the end (delta: 38.1 MB). Peak memory consumption was 38.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1994.46 ms. Allocated memory was 200.3 MB in the beginning and 231.2 MB in the end (delta: 30.9 MB). Free memory was 136.1 MB in the beginning and 112.7 MB in the end (delta: 23.4 MB). Peak memory consumption was 54.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 110]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 109, overapproximation of someBinaryArithmeticFLOAToperation at line 104, overapproximation of bitwiseAnd at line 93. Possible FailurePath: [L12] static const float one_modf = 1.0; [L104] float x = -1.0f / 0.0f; [L105] float iptr = __VERIFIER_nondet_float(); [L106] CALL, EXPR modf_float(x, &iptr) [L15] __int32_t i0, j0; [L16] __uint32_t i; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (i0) = gf_u.word [L22] j0 = ((i0 >> 23) & 0xff) - 0x7f [L23] COND TRUE j0 < 23 [L24] COND TRUE j0 < 0 [L26] ieee_float_shape_type sf_u; [L27] sf_u.word = (i0 & 0x80000000) [L28] EXPR sf_u.value [L28] (*iptr) = sf_u.value [L30] return x; [L106] RET, EXPR modf_float(x, &iptr) [L106] float res = modf_float(x, &iptr); [L109] EXPR \read(iptr) [L109] CALL, EXPR isinf_float(iptr) [L87] __int32_t ix; [L89] ieee_float_shape_type gf_u; [L90] gf_u.value = (x) [L91] EXPR gf_u.word [L91] (ix) = gf_u.word [L93] ix &= 0x7fffffff [L94] return ((ix) == 0x7f800000L); [L109] RET, EXPR isinf_float(iptr) [L109] isinf_float(iptr) && !(res == -0.0f && __signbit_float(res) == 1) [L109] EXPR res == -0.0f && __signbit_float(res) == 1 [L109] isinf_float(iptr) && !(res == -0.0f && __signbit_float(res) == 1) [L109] COND TRUE isinf_float(iptr) && !(res == -0.0f && __signbit_float(res) == 1) [L110] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 168 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 316 SDtfs, 42 SDslu, 332 SDs, 0 SdLazy, 424 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=168occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 194 NumberOfCodeBlocks, 194 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 117 ConstructedInterpolants, 0 QuantifiedInterpolants, 11440 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...