/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 00:06:01,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 00:06:01,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 00:06:02,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 00:06:02,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 00:06:02,001 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 00:06:02,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 00:06:02,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 00:06:02,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 00:06:02,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 00:06:02,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 00:06:02,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 00:06:02,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 00:06:02,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 00:06:02,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 00:06:02,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 00:06:02,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 00:06:02,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 00:06:02,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 00:06:02,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 00:06:02,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 00:06:02,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 00:06:02,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 00:06:02,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 00:06:02,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 00:06:02,033 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 00:06:02,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 00:06:02,034 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 00:06:02,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 00:06:02,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 00:06:02,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 00:06:02,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 00:06:02,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 00:06:02,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 00:06:02,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 00:06:02,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 00:06:02,037 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 00:06:02,037 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 00:06:02,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 00:06:02,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 00:06:02,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 00:06:02,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-31 00:06:02,057 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 00:06:02,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 00:06:02,058 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 00:06:02,058 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 00:06:02,058 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 00:06:02,059 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 00:06:02,059 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 00:06:02,059 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 00:06:02,059 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 00:06:02,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 00:06:02,059 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 00:06:02,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 00:06:02,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 00:06:02,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 00:06:02,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 00:06:02,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 00:06:02,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 00:06:02,060 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 00:06:02,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 00:06:02,061 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 00:06:02,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 00:06:02,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 00:06:02,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 00:06:02,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 00:06:02,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:06:02,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 00:06:02,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 00:06:02,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 00:06:02,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 00:06:02,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 00:06:02,062 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 00:06:02,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 00:06:02,062 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 00:06:02,062 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 00:06:02,063 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 00:06:02,063 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 00:06:02,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 00:06:02,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 00:06:02,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 00:06:02,248 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 00:06:02,248 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 00:06:02,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2023-03-31 00:06:03,275 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 00:06:03,402 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 00:06:03,403 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2023-03-31 00:06:03,411 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/520bc1650/2bcfc95c50c644e6ae29c757852629d0/FLAG26e574b07 [2023-03-31 00:06:03,427 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/520bc1650/2bcfc95c50c644e6ae29c757852629d0 [2023-03-31 00:06:03,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 00:06:03,431 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 00:06:03,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 00:06:03,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 00:06:03,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 00:06:03,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:06:03" (1/1) ... [2023-03-31 00:06:03,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29675c39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:06:03, skipping insertion in model container [2023-03-31 00:06:03,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:06:03" (1/1) ... [2023-03-31 00:06:03,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 00:06:03,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 00:06:03,588 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c[1897,1910] [2023-03-31 00:06:03,591 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:06:03,598 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 00:06:03,612 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c[1897,1910] [2023-03-31 00:06:03,614 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:06:03,623 INFO L208 MainTranslator]: Completed translation [2023-03-31 00:06:03,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:06:03 WrapperNode [2023-03-31 00:06:03,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 00:06:03,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 00:06:03,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 00:06:03,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 00:06:03,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:06:03" (1/1) ... [2023-03-31 00:06:03,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:06:03" (1/1) ... [2023-03-31 00:06:03,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:06:03" (1/1) ... [2023-03-31 00:06:03,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:06:03" (1/1) ... [2023-03-31 00:06:03,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:06:03" (1/1) ... [2023-03-31 00:06:03,646 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:06:03" (1/1) ... [2023-03-31 00:06:03,647 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:06:03" (1/1) ... [2023-03-31 00:06:03,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:06:03" (1/1) ... [2023-03-31 00:06:03,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 00:06:03,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 00:06:03,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 00:06:03,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 00:06:03,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:06:03" (1/1) ... [2023-03-31 00:06:03,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:06:03,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:06:03,698 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 00:06:03,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 00:06:03,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 00:06:03,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 00:06:03,728 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 00:06:03,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2023-03-31 00:06:03,728 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2023-03-31 00:06:03,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2023-03-31 00:06:03,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 00:06:03,729 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 00:06:03,729 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 00:06:03,729 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 00:06:03,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 00:06:03,729 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2023-03-31 00:06:03,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 00:06:03,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-03-31 00:06:03,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 00:06:03,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 00:06:03,729 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2023-03-31 00:06:03,729 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2023-03-31 00:06:03,729 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 00:06:03,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 00:06:03,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 00:06:03,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 00:06:03,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 00:06:03,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-03-31 00:06:03,788 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 00:06:03,789 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 00:06:03,941 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 00:06:03,948 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 00:06:03,949 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-03-31 00:06:03,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:06:03 BoogieIcfgContainer [2023-03-31 00:06:03,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 00:06:03,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 00:06:03,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 00:06:03,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 00:06:03,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:06:03" (1/3) ... [2023-03-31 00:06:03,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4167a766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:06:03, skipping insertion in model container [2023-03-31 00:06:03,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:06:03" (2/3) ... [2023-03-31 00:06:03,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4167a766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:06:03, skipping insertion in model container [2023-03-31 00:06:03,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:06:03" (3/3) ... [2023-03-31 00:06:03,965 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2023-03-31 00:06:03,977 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 00:06:03,977 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 00:06:04,015 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 00:06:04,020 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@40806247, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 00:06:04,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 00:06:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 00:06:04,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-31 00:06:04,029 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:06:04,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:06:04,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:06:04,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:06:04,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1371019116, now seen corresponding path program 1 times [2023-03-31 00:06:04,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:06:04,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392295660] [2023-03-31 00:06:04,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:06:04,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:06:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:06:04,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:06:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:06:04,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-31 00:06:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:06:04,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-03-31 00:06:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:06:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:06:04,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:06:04,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392295660] [2023-03-31 00:06:04,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392295660] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:06:04,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:06:04,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 00:06:04,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211223844] [2023-03-31 00:06:04,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:06:04,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 00:06:04,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:06:04,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 00:06:04,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:06:04,280 INFO L87 Difference]: Start difference. First operand has 42 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 00:06:04,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:06:04,477 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2023-03-31 00:06:04,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 00:06:04,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2023-03-31 00:06:04,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:06:04,484 INFO L225 Difference]: With dead ends: 75 [2023-03-31 00:06:04,484 INFO L226 Difference]: Without dead ends: 38 [2023-03-31 00:06:04,487 INFO L412 NwaCegarLoop]: 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 [2023-03-31 00:06:04,489 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 42 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:06:04,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 7 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:06:04,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-03-31 00:06:04,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-03-31 00:06:04,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 00:06:04,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-03-31 00:06:04,518 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 22 [2023-03-31 00:06:04,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:06:04,518 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-03-31 00:06:04,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 00:06:04,526 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-03-31 00:06:04,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 00:06:04,527 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:06:04,527 INFO L195 NwaCegarLoop]: 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] [2023-03-31 00:06:04,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 00:06:04,528 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:06:04,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:06:04,528 INFO L85 PathProgramCache]: Analyzing trace with hash -793985609, now seen corresponding path program 1 times [2023-03-31 00:06:04,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:06:04,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54561996] [2023-03-31 00:06:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:06:04,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:06:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:06:04,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:06:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:06:04,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-31 00:06:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:06:04,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-03-31 00:06:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:06:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:06:04,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:06:04,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54561996] [2023-03-31 00:06:04,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54561996] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:06:04,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:06:04,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 00:06:04,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718098536] [2023-03-31 00:06:04,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:06:04,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 00:06:04,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:06:04,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 00:06:04,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 00:06:04,809 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 00:06:04,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:06:04,974 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2023-03-31 00:06:04,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 00:06:04,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2023-03-31 00:06:04,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:06:04,984 INFO L225 Difference]: With dead ends: 57 [2023-03-31 00:06:04,985 INFO L226 Difference]: Without dead ends: 42 [2023-03-31 00:06:04,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-03-31 00:06:04,990 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 43 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:06:04,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 7 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:06:04,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-03-31 00:06:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-03-31 00:06:04,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-03-31 00:06:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2023-03-31 00:06:04,998 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2023-03-31 00:06:04,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:06:04,998 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2023-03-31 00:06:04,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 00:06:04,999 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2023-03-31 00:06:04,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 00:06:04,999 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:06:04,999 INFO L195 NwaCegarLoop]: 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] [2023-03-31 00:06:05,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 00:06:05,000 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:06:05,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:06:05,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1755333421, now seen corresponding path program 1 times [2023-03-31 00:06:05,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:06:05,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683463478] [2023-03-31 00:06:05,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:06:05,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:06:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:06:05,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:06:05,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:06:05,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-31 00:06:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:06:05,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-03-31 00:06:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:06:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:06:05,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:06:05,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683463478] [2023-03-31 00:06:05,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683463478] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:06:05,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:06:05,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 00:06:05,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085315947] [2023-03-31 00:06:05,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:06:05,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 00:06:05,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:06:05,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 00:06:05,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 00:06:05,115 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 00:06:05,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:06:05,232 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2023-03-31 00:06:05,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 00:06:05,233 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2023-03-31 00:06:05,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:06:05,234 INFO L225 Difference]: With dead ends: 61 [2023-03-31 00:06:05,234 INFO L226 Difference]: Without dead ends: 46 [2023-03-31 00:06:05,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-03-31 00:06:05,235 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 43 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:06:05,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 7 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:06:05,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-03-31 00:06:05,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2023-03-31 00:06:05,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-03-31 00:06:05,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2023-03-31 00:06:05,241 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 26 [2023-03-31 00:06:05,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:06:05,241 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2023-03-31 00:06:05,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 00:06:05,242 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2023-03-31 00:06:05,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 00:06:05,242 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:06:05,242 INFO L195 NwaCegarLoop]: 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] [2023-03-31 00:06:05,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 00:06:05,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:06:05,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:06:05,243 INFO L85 PathProgramCache]: Analyzing trace with hash 742682516, now seen corresponding path program 1 times [2023-03-31 00:06:05,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:06:05,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710956601] [2023-03-31 00:06:05,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:06:05,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:06:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 00:06:05,257 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-03-31 00:06:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 00:06:05,279 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-03-31 00:06:05,279 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-03-31 00:06:05,280 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-31 00:06:05,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 00:06:05,284 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-03-31 00:06:05,287 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 00:06:05,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 12:06:05 BoogieIcfgContainer [2023-03-31 00:06:05,315 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 00:06:05,316 INFO L158 Benchmark]: Toolchain (without parser) took 1885.36ms. Allocated memory is still 252.7MB. Free memory was 204.9MB in the beginning and 162.3MB in the end (delta: 42.6MB). Peak memory consumption was 43.6MB. Max. memory is 8.0GB. [2023-03-31 00:06:05,316 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 195.0MB. Free memory is still 143.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 00:06:05,316 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.19ms. Allocated memory is still 252.7MB. Free memory was 204.9MB in the beginning and 193.8MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-03-31 00:06:05,316 INFO L158 Benchmark]: Boogie Preprocessor took 33.87ms. Allocated memory is still 252.7MB. Free memory was 193.8MB in the beginning and 192.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-03-31 00:06:05,317 INFO L158 Benchmark]: RCFGBuilder took 291.12ms. Allocated memory is still 252.7MB. Free memory was 192.3MB in the beginning and 178.1MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-03-31 00:06:05,317 INFO L158 Benchmark]: TraceAbstraction took 1363.80ms. Allocated memory is still 252.7MB. Free memory was 177.6MB in the beginning and 162.3MB in the end (delta: 15.3MB). Peak memory consumption was 16.4MB. Max. memory is 8.0GB. [2023-03-31 00:06:05,318 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 195.0MB. Free memory is still 143.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 191.19ms. Allocated memory is still 252.7MB. Free memory was 204.9MB in the beginning and 193.8MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.87ms. Allocated memory is still 252.7MB. Free memory was 193.8MB in the beginning and 192.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 291.12ms. Allocated memory is still 252.7MB. Free memory was 192.3MB in the beginning and 178.1MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 1363.80ms. Allocated memory is still 252.7MB. Free memory was 177.6MB in the beginning and 162.3MB in the end (delta: 15.3MB). Peak memory consumption was 16.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 81]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 80, overapproximation of someUnaryFLOAToperation at line 74. Possible FailurePath: [L74] float x = -0.0f; [L75] float y = 0.0f; VAL [y=0] [L77] CALL, EXPR fmax_float(x, y) VAL [\old(x)=4286578698, \old(y)=0] [L45] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=4286578698] [L22] __uint32_t w; VAL [\old(x)=4286578698, x=4286578698] [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (w) = gf_u.word [L30] COND FALSE !(w == 0x00000000 || w == 0x80000000) VAL [\old(x)=4286578698, w=4286578689, x=4286578698] [L32-L33] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) VAL [\old(x)=4286578698, w=4286578689, x=4286578698] [L35-L36] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) VAL [\old(x)=4286578698, w=4286578689, x=4286578698] [L38] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L41] return 0; VAL [\old(x)=4286578698, \result=0, w=4286578689, x=4286578698] [L45] RET, EXPR __fpclassify_float(x) VAL [\old(x)=4286578698, \old(y)=0, __fpclassify_float(x)=0, x=4286578698, y=0] [L45] COND TRUE __fpclassify_float(x) == 0 [L46] return y; VAL [\old(x)=4286578698, \old(y)=0, \result=0, x=4286578698, y=0] [L77] RET, EXPR fmax_float(x, y) VAL [fmax_float(x, y)=0, x=4286578698, y=0] [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [res == 0.0f && __signbit_float(res) == 0=0, res=0, x=4286578698, y=0] [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() VAL [res=0, x=4286578698, y=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.3s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 136 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 128 mSDsluCounter, 21 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10 mSDsCounter, 34 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 405 IncrementalHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 34 mSolverCounterUnsat, 11 mSDtfsCounter, 405 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, InterpolantAutomatonStates: 19, 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, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 97 NumberOfCodeBlocks, 97 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 174 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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 [2023-03-31 00:06:05,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...