/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=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1131b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 12:54:09,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 12:54:09,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 12:54:09,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 12:54:09,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 12:54:09,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 12:54:09,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 12:54:09,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 12:54:09,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 12:54:09,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 12:54:09,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 12:54:09,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 12:54:09,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 12:54:09,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 12:54:09,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 12:54:09,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 12:54:09,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 12:54:09,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 12:54:09,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 12:54:09,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 12:54:09,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 12:54:09,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 12:54:09,814 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 12:54:09,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 12:54:09,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 12:54:09,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 12:54:09,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 12:54:09,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 12:54:09,820 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 12:54:09,821 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 12:54:09,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 12:54:09,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 12:54:09,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 12:54:09,824 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 12:54:09,825 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 12:54:09,825 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 12:54:09,829 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 12:54:09,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 12:54:09,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 12:54:09,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 12:54:09,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 12:54:09,835 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 [2020-08-18 12:54:09,881 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 12:54:09,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 12:54:09,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 12:54:09,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 12:54:09,886 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 12:54:09,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 12:54:09,886 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 12:54:09,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 12:54:09,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 12:54:09,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 12:54:09,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 12:54:09,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 12:54:09,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 12:54:09,889 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 12:54:09,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 12:54:09,890 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 12:54:09,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 12:54:09,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 12:54:09,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 12:54:09,891 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 12:54:09,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 12:54:09,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:54:09,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 12:54:09,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 12:54:09,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 12:54:09,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 12:54:09,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 12:54:09,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 12:54:09,893 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 12:54:09,894 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=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 12:54:10,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 12:54:10,224 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 12:54:10,229 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 12:54:10,231 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 12:54:10,232 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 12:54:10,232 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1131b.c [2020-08-18 12:54:10,300 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55a757fd1/928d768c1c3a4ed5bae1d1165db1ae92/FLAGfc8ab4ea6 [2020-08-18 12:54:10,781 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 12:54:10,782 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1131b.c [2020-08-18 12:54:10,789 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55a757fd1/928d768c1c3a4ed5bae1d1165db1ae92/FLAGfc8ab4ea6 [2020-08-18 12:54:11,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55a757fd1/928d768c1c3a4ed5bae1d1165db1ae92 [2020-08-18 12:54:11,149 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 12:54:11,151 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 12:54:11,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 12:54:11,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 12:54:11,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 12:54:11,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:54:11" (1/1) ... [2020-08-18 12:54:11,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f98ced9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:11, skipping insertion in model container [2020-08-18 12:54:11,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:54:11" (1/1) ... [2020-08-18 12:54:11,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 12:54:11,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 12:54:11,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:54:11,514 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 12:54:11,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:54:11,668 INFO L208 MainTranslator]: Completed translation [2020-08-18 12:54:11,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:11 WrapperNode [2020-08-18 12:54:11,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 12:54:11,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 12:54:11,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 12:54:11,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 12:54:11,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:11" (1/1) ... [2020-08-18 12:54:11,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:11" (1/1) ... [2020-08-18 12:54:11,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:11" (1/1) ... [2020-08-18 12:54:11,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:11" (1/1) ... [2020-08-18 12:54:11,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:11" (1/1) ... [2020-08-18 12:54:11,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:11" (1/1) ... [2020-08-18 12:54:11,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:11" (1/1) ... [2020-08-18 12:54:11,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 12:54:11,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 12:54:11,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 12:54:11,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 12:54:11,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:11" (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 [2020-08-18 12:54:11,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 12:54:11,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 12:54:11,809 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-08-18 12:54:11,809 INFO L138 BoogieDeclarations]: Found implementation of procedure isfinite_float [2020-08-18 12:54:11,809 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 12:54:11,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 12:54:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-18 12:54:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-08-18 12:54:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 12:54:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 12:54:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 12:54:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 12:54:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 12:54:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 12:54:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure isfinite_float [2020-08-18 12:54:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 12:54:11,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 12:54:11,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-08-18 12:54:11,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 12:54:12,310 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 12:54:12,310 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-08-18 12:54:12,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:54:12 BoogieIcfgContainer [2020-08-18 12:54:12,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 12:54:12,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 12:54:12,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 12:54:12,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 12:54:12,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:54:11" (1/3) ... [2020-08-18 12:54:12,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e86aa96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:54:12, skipping insertion in model container [2020-08-18 12:54:12,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:11" (2/3) ... [2020-08-18 12:54:12,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e86aa96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:54:12, skipping insertion in model container [2020-08-18 12:54:12,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:54:12" (3/3) ... [2020-08-18 12:54:12,326 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1131b.c [2020-08-18 12:54:12,337 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 12:54:12,349 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 12:54:12,363 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 12:54:12,389 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 12:54:12,389 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 12:54:12,389 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 12:54:12,389 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 12:54:12,390 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 12:54:12,390 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 12:54:12,390 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 12:54:12,390 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 12:54:12,411 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-08-18 12:54:12,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 12:54:12,418 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:54:12,419 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] [2020-08-18 12:54:12,420 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:54:12,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:54:12,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1081724134, now seen corresponding path program 1 times [2020-08-18 12:54:12,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:54:12,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235908702] [2020-08-18 12:54:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:54:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:12,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:54:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:12,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:54:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:12,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 12:54:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:54:12,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235908702] [2020-08-18 12:54:12,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:54:12,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 12:54:12,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607275486] [2020-08-18 12:54:12,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 12:54:12,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:54:12,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 12:54:12,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 12:54:12,766 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 4 states. [2020-08-18 12:54:13,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:54:13,033 INFO L93 Difference]: Finished difference Result 112 states and 175 transitions. [2020-08-18 12:54:13,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 12:54:13,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-18 12:54:13,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:54:13,047 INFO L225 Difference]: With dead ends: 112 [2020-08-18 12:54:13,047 INFO L226 Difference]: Without dead ends: 55 [2020-08-18 12:54:13,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:54:13,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-18 12:54:13,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-18 12:54:13,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 12:54:13,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2020-08-18 12:54:13,105 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 25 [2020-08-18 12:54:13,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:54:13,106 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2020-08-18 12:54:13,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 12:54:13,106 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2020-08-18 12:54:13,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 12:54:13,108 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:54:13,108 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] [2020-08-18 12:54:13,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 12:54:13,109 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:54:13,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:54:13,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1695884658, now seen corresponding path program 1 times [2020-08-18 12:54:13,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:54:13,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837996579] [2020-08-18 12:54:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:54:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 12:54:13,226 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 12:54:13,226 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 12:54:13,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 12:54:13,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 12:54:13 BoogieIcfgContainer [2020-08-18 12:54:13,278 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 12:54:13,282 INFO L168 Benchmark]: Toolchain (without parser) took 2129.95 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 100.4 MB in the beginning and 91.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 71.5 MB. Max. memory is 7.1 GB. [2020-08-18 12:54:13,285 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 12:54:13,287 INFO L168 Benchmark]: CACSL2BoogieTranslator took 517.36 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 100.2 MB in the beginning and 176.1 MB in the end (delta: -75.9 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2020-08-18 12:54:13,289 INFO L168 Benchmark]: Boogie Preprocessor took 77.23 ms. Allocated memory is still 200.3 MB. Free memory was 176.1 MB in the beginning and 174.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-08-18 12:54:13,290 INFO L168 Benchmark]: RCFGBuilder took 568.24 ms. Allocated memory is still 200.3 MB. Free memory was 174.1 MB in the beginning and 145.9 MB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. [2020-08-18 12:54:13,292 INFO L168 Benchmark]: TraceAbstraction took 962.04 ms. Allocated memory is still 200.3 MB. Free memory was 145.2 MB in the beginning and 91.3 MB in the end (delta: 53.9 MB). Peak memory consumption was 53.9 MB. Max. memory is 7.1 GB. [2020-08-18 12:54:13,297 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 517.36 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 100.2 MB in the beginning and 176.1 MB in the end (delta: -75.9 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 77.23 ms. Allocated memory is still 200.3 MB. Free memory was 176.1 MB in the beginning and 174.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 568.24 ms. Allocated memory is still 200.3 MB. Free memory was 174.1 MB in the beginning and 145.9 MB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 962.04 ms. Allocated memory is still 200.3 MB. Free memory was 145.2 MB in the beginning and 91.3 MB in the end (delta: 53.9 MB). Peak memory consumption was 53.9 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 someBinaryArithmeticFLOAToperation at line 35, overapproximation of bitwiseXor at line 31. Possible FailurePath: [L12-L15] static const float one_fmod = 1.0, Zero_fmod[] = { 0.0, -0.0, }; [L126] float x = __VERIFIER_nondet_float(); [L127] float y = -1.0f / 0.0f; [L129] CALL isfinite_float(x) [L109] __int32_t ix; [L111] ieee_float_shape_type gf_u; [L112] gf_u.value = (x) [L113] EXPR gf_u.word [L113] (ix) = gf_u.word [L115] ix &= 0x7fffffff [L116] return (((ix) < 0x7f800000L)); [L129] RET isfinite_float(x) [L129] COND TRUE isfinite_float(x) [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] COND TRUE res != x [L135] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 60 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 73 SDtfs, 6 SDslu, 63 SDs, 0 SdLazy, 78 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred 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, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 1656 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...