/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:43:33,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 02:43:33,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 02:43:33,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 02:43:33,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 02:43:33,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 02:43:33,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 02:43:33,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 02:43:33,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 02:43:33,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 02:43:33,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 02:43:33,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 02:43:33,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:43:33,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:43:33,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:43:33,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:43:33,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:43:33,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:43:33,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:43:33,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:43:33,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:43:33,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:43:33,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:43:33,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:43:33,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 02:43:33,152 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 02:43:33,152 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 02:43:33,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 02:43:33,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 02:43:33,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-19 02:43:33,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:43:33,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:43:33,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:43:33,164 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 [2020-08-19 02:43:33,213 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:43:33,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:43:33,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:43:33,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:43:33,215 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:43:33,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:43:33,219 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:43:33,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:43:33,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:43:33,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:43:33,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:43:33,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:43:33,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:43:33,220 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:43:33,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:43:33,222 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:43:33,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:43:33,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:43:33,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:43:33,222 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:43:33,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:43:33,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:43:33,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:43:33,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:43:33,223 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:43:33,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:43:33,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:43:33,224 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:43:33,224 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:43:33,224 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; [2020-08-19 02:43:33,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:43:33,574 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:43:33,579 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:43:33,581 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:43:33,583 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:43:33,583 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-19 02:43:33,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae6d13430/0f58cb06ee354f01b35682f4359452e5/FLAGa5a8a69fd [2020-08-19 02:43:34,108 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:43:34,109 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-19 02:43:34,117 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae6d13430/0f58cb06ee354f01b35682f4359452e5/FLAGa5a8a69fd [2020-08-19 02:43:34,522 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae6d13430/0f58cb06ee354f01b35682f4359452e5 [2020-08-19 02:43:34,532 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:43:34,534 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:43:34,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:43:34,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:43:34,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:43:34,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:43:34" (1/1) ... [2020-08-19 02:43:34,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@90d95a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:34, skipping insertion in model container [2020-08-19 02:43:34,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:43:34" (1/1) ... [2020-08-19 02:43:34,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:43:34,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:43:34,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:43:34,788 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:43:34,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:43:34,932 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:43:34,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:34 WrapperNode [2020-08-19 02:43:34,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:43:34,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:43:34,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:43:34,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:43:34,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:34" (1/1) ... [2020-08-19 02:43:34,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:34" (1/1) ... [2020-08-19 02:43:34,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:34" (1/1) ... [2020-08-19 02:43:34,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:34" (1/1) ... [2020-08-19 02:43:34,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:34" (1/1) ... [2020-08-19 02:43:34,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:34" (1/1) ... [2020-08-19 02:43:34,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:34" (1/1) ... [2020-08-19 02:43:34,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:43:34,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:43:34,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:43:34,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:43:34,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:34" (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 [2020-08-19 02:43:35,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:43:35,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:43:35,066 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-08-19 02:43:35,066 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-19 02:43:35,066 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:43:35,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:43:35,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-19 02:43:35,067 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-08-19 02:43:35,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 02:43:35,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-19 02:43:35,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 02:43:35,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 02:43:35,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-19 02:43:35,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 02:43:35,068 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-19 02:43:35,068 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:43:35,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:43:35,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-08-19 02:43:35,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:43:35,556 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:43:35,556 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-08-19 02:43:35,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:43:35 BoogieIcfgContainer [2020-08-19 02:43:35,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:43:35,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:43:35,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:43:35,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:43:35,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:43:34" (1/3) ... [2020-08-19 02:43:35,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178b22b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:43:35, skipping insertion in model container [2020-08-19 02:43:35,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:34" (2/3) ... [2020-08-19 02:43:35,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178b22b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:43:35, skipping insertion in model container [2020-08-19 02:43:35,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:43:35" (3/3) ... [2020-08-19 02:43:35,570 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1130a.c [2020-08-19 02:43:35,584 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:43:35,603 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:43:35,614 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:43:35,637 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:43:35,637 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:43:35,637 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:43:35,637 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:43:35,637 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:43:35,638 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:43:35,638 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:43:35,638 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:43:35,658 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-19 02:43:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 02:43:35,664 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:35,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:35,665 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:35,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:35,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1920116781, now seen corresponding path program 1 times [2020-08-19 02:43:35,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:35,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24968532] [2020-08-19 02:43:35,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:35,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:35,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 02:43:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:43:35,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24968532] [2020-08-19 02:43:35,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:43:35,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:43:35,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493670897] [2020-08-19 02:43:35,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:43:35,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:35,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:43:35,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:43:35,973 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-19 02:43:36,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:36,238 INFO L93 Difference]: Finished difference Result 116 states and 180 transitions. [2020-08-19 02:43:36,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:43:36,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-19 02:43:36,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:36,253 INFO L225 Difference]: With dead ends: 116 [2020-08-19 02:43:36,253 INFO L226 Difference]: Without dead ends: 56 [2020-08-19 02:43:36,258 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 [2020-08-19 02:43:36,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-19 02:43:36,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-08-19 02:43:36,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-19 02:43:36,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-08-19 02:43:36,311 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 19 [2020-08-19 02:43:36,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:36,312 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-08-19 02:43:36,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:43:36,312 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-08-19 02:43:36,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 02:43:36,313 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:36,314 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] [2020-08-19 02:43:36,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:43:36,314 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:36,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:36,315 INFO L82 PathProgramCache]: Analyzing trace with hash -2095475350, now seen corresponding path program 1 times [2020-08-19 02:43:36,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:36,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116564758] [2020-08-19 02:43:36,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 02:43:36,423 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 02:43:36,423 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 02:43:36,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:43:36,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 02:43:36 BoogieIcfgContainer [2020-08-19 02:43:36,474 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 02:43:36,477 INFO L168 Benchmark]: Toolchain (without parser) took 1942.60 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 103.1 MB in the beginning and 95.4 MB in the end (delta: 7.6 MB). Peak memory consumption was 70.5 MB. Max. memory is 7.1 GB. [2020-08-19 02:43:36,478 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 02:43:36,479 INFO L168 Benchmark]: CACSL2BoogieTranslator took 398.07 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 102.6 MB in the beginning and 179.2 MB in the end (delta: -76.5 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. [2020-08-19 02:43:36,480 INFO L168 Benchmark]: Boogie Preprocessor took 55.91 ms. Allocated memory is still 203.4 MB. Free memory was 179.2 MB in the beginning and 177.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-08-19 02:43:36,481 INFO L168 Benchmark]: RCFGBuilder took 571.68 ms. Allocated memory is still 203.4 MB. Free memory was 176.5 MB in the beginning and 148.8 MB in the end (delta: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. [2020-08-19 02:43:36,482 INFO L168 Benchmark]: TraceAbstraction took 911.55 ms. Allocated memory is still 203.4 MB. Free memory was 148.1 MB in the beginning and 95.4 MB in the end (delta: 52.7 MB). Peak memory consumption was 52.7 MB. Max. memory is 7.1 GB. [2020-08-19 02:43:36,487 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 398.07 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 102.6 MB in the beginning and 179.2 MB in the end (delta: -76.5 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 55.91 ms. Allocated memory is still 203.4 MB. Free memory was 179.2 MB in the beginning and 177.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 571.68 ms. Allocated memory is still 203.4 MB. Free memory was 176.5 MB in the beginning and 148.8 MB in the end (delta: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 911.55 ms. Allocated memory is still 203.4 MB. Free memory was 148.1 MB in the beginning and 95.4 MB in the end (delta: 52.7 MB). Peak memory consumption was 52.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 135]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 134, overapproximation of someUnaryDOUBLEoperation at line 14, overapproximation of bitwiseAnd at line 30, overapproximation of bitwiseXor at line 31, overapproximation of someBinaryArithmeticFLOAToperation at line 35. Possible FailurePath: [L12-L15] static const float one_fmod = 1.0, Zero_fmod[] = { 0.0, -0.0, }; [L126] float x = 0.0f; [L127] float y = __VERIFIER_nondet_float(); [L129] COND TRUE (y < 0.0f || y > 0.0f) [L131] CALL, EXPR fmod_float(x, y) [L18] __int32_t n, hx, hy, hz, ix, iy, sx, i; [L21] ieee_float_shape_type gf_u; [L22] gf_u.value = (x) [L23] EXPR gf_u.word [L23] (hx) = gf_u.word [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (y) [L28] EXPR gf_u.word [L28] (hy) = gf_u.word [L30] sx = hx & 0x80000000 [L31] hx ^= sx [L32] hy &= 0x7fffffff [L34] COND TRUE ((hy) == 0) || !((hx) < 0x7f800000L) || ((hy) > 0x7f800000L) [L35] return (x * y) / (x * y); [L131] RET, EXPR fmod_float(x, y) [L131] float res = fmod_float(x, y); [L134] EXPR res == 0.0f && __signbit_float(res) == 0 [L134] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L135] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 75 SDtfs, 14 SDslu, 61 SDs, 0 SdLazy, 80 SolverSat, 6 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=61occurred 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, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 918 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...