./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e29f062842798044f4f77e299bc6043cf6e874a22c0b9b512a8e0e54ddd042d9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 01:48:47,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 01:48:47,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 01:48:47,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 01:48:47,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 01:48:47,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 01:48:47,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 01:48:47,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 01:48:47,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 01:48:47,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 01:48:47,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 01:48:47,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 01:48:47,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 01:48:47,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 01:48:47,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 01:48:47,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 01:48:47,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 01:48:47,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 01:48:47,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 01:48:47,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 01:48:47,570 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 01:48:47,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 01:48:47,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 01:48:47,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 01:48:47,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 01:48:47,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 01:48:47,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 01:48:47,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 01:48:47,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 01:48:47,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 01:48:47,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 01:48:47,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 01:48:47,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 01:48:47,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 01:48:47,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 01:48:47,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 01:48:47,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 01:48:47,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 01:48:47,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 01:48:47,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 01:48:47,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 01:48:47,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 01:48:47,593 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 01:48:47,617 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 01:48:47,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 01:48:47,618 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 01:48:47,618 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 01:48:47,619 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 01:48:47,619 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 01:48:47,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 01:48:47,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 01:48:47,620 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 01:48:47,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 01:48:47,621 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 01:48:47,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 01:48:47,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 01:48:47,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 01:48:47,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 01:48:47,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 01:48:47,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 01:48:47,627 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 01:48:47,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 01:48:47,627 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 01:48:47,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 01:48:47,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 01:48:47,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 01:48:47,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 01:48:47,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 01:48:47,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 01:48:47,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 01:48:47,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 01:48:47,629 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 01:48:47,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 01:48:47,629 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 01:48:47,629 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 01:48:47,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 01:48:47,630 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e29f062842798044f4f77e299bc6043cf6e874a22c0b9b512a8e0e54ddd042d9 [2022-07-21 01:48:47,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 01:48:47,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 01:48:47,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 01:48:47,909 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 01:48:47,909 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 01:48:47,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2022-07-21 01:48:47,961 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75af38dd9/515b1ae60cf045e4aecfa7e68d3b6f9a/FLAG4a1a7962b [2022-07-21 01:48:48,275 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 01:48:48,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2022-07-21 01:48:48,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75af38dd9/515b1ae60cf045e4aecfa7e68d3b6f9a/FLAG4a1a7962b [2022-07-21 01:48:48,695 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75af38dd9/515b1ae60cf045e4aecfa7e68d3b6f9a [2022-07-21 01:48:48,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 01:48:48,698 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 01:48:48,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 01:48:48,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 01:48:48,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 01:48:48,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:48:48" (1/1) ... [2022-07-21 01:48:48,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36233830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:48, skipping insertion in model container [2022-07-21 01:48:48,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:48:48" (1/1) ... [2022-07-21 01:48:48,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 01:48:48,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 01:48:48,826 WARN L230 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/double_req_bl_1232b.c[1958,1971] [2022-07-21 01:48:48,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 01:48:48,843 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 01:48:48,906 WARN L230 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/double_req_bl_1232b.c[1958,1971] [2022-07-21 01:48:48,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 01:48:48,920 INFO L208 MainTranslator]: Completed translation [2022-07-21 01:48:48,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:48 WrapperNode [2022-07-21 01:48:48,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 01:48:48,922 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 01:48:48,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 01:48:48,922 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 01:48:48,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:48" (1/1) ... [2022-07-21 01:48:48,938 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:48" (1/1) ... [2022-07-21 01:48:48,957 INFO L137 Inliner]: procedures = 19, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2022-07-21 01:48:48,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 01:48:48,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 01:48:48,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 01:48:48,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 01:48:48,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:48" (1/1) ... [2022-07-21 01:48:48,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:48" (1/1) ... [2022-07-21 01:48:48,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:48" (1/1) ... [2022-07-21 01:48:48,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:48" (1/1) ... [2022-07-21 01:48:48,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:48" (1/1) ... [2022-07-21 01:48:48,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:48" (1/1) ... [2022-07-21 01:48:48,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:48" (1/1) ... [2022-07-21 01:48:48,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 01:48:48,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 01:48:48,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 01:48:48,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 01:48:48,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:48" (1/1) ... [2022-07-21 01:48:48,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 01:48:49,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 01:48:49,015 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) [2022-07-21 01:48:49,043 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 [2022-07-21 01:48:49,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 01:48:49,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 01:48:49,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 01:48:49,056 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2022-07-21 01:48:49,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2022-07-21 01:48:49,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-07-21 01:48:49,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 01:48:49,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 01:48:49,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 01:48:49,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 01:48:49,126 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 01:48:49,127 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 01:48:49,239 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 01:48:49,243 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 01:48:49,243 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 01:48:49,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:48:49 BoogieIcfgContainer [2022-07-21 01:48:49,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 01:48:49,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 01:48:49,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 01:48:49,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 01:48:49,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:48:48" (1/3) ... [2022-07-21 01:48:49,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d578606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:48:49, skipping insertion in model container [2022-07-21 01:48:49,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:48" (2/3) ... [2022-07-21 01:48:49,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d578606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:48:49, skipping insertion in model container [2022-07-21 01:48:49,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:48:49" (3/3) ... [2022-07-21 01:48:49,273 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1232b.c [2022-07-21 01:48:49,283 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 01:48:49,283 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 01:48:49,358 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 01:48:49,368 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@28c7189, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7d778211 [2022-07-21 01:48:49,368 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 01:48:49,378 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 01:48:49,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 01:48:49,395 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:49,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:49,397 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:49,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:49,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1634587165, now seen corresponding path program 1 times [2022-07-21 01:48:49,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:48:49,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015459658] [2022-07-21 01:48:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:49,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:48:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:49,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 01:48:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:48:49,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 01:48:49,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015459658] [2022-07-21 01:48:49,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015459658] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:49,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:49,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 01:48:49,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701405365] [2022-07-21 01:48:49,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:49,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 01:48:49,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 01:48:49,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 01:48:49,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 01:48:49,603 INFO L87 Difference]: Start difference. First operand has 31 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:49,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:49,639 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2022-07-21 01:48:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 01:48:49,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-07-21 01:48:49,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:49,647 INFO L225 Difference]: With dead ends: 59 [2022-07-21 01:48:49,647 INFO L226 Difference]: Without dead ends: 28 [2022-07-21 01:48:49,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 01:48:49,653 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:49,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 71 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:48:49,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-21 01:48:49,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-21 01:48:49,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 01:48:49,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2022-07-21 01:48:49,686 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 14 [2022-07-21 01:48:49,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:49,687 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2022-07-21 01:48:49,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:49,688 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2022-07-21 01:48:49,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 01:48:49,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:49,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:49,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 01:48:49,692 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:49,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:49,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1992797582, now seen corresponding path program 1 times [2022-07-21 01:48:49,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:48:49,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002650703] [2022-07-21 01:48:49,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:49,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:48:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:49,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 01:48:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:48:49,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 01:48:49,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002650703] [2022-07-21 01:48:49,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002650703] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:49,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:49,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 01:48:49,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023302037] [2022-07-21 01:48:49,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:49,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 01:48:49,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 01:48:49,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 01:48:49,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:48:49,839 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:49,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:49,874 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-07-21 01:48:49,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 01:48:49,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-21 01:48:49,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:49,877 INFO L225 Difference]: With dead ends: 41 [2022-07-21 01:48:49,878 INFO L226 Difference]: Without dead ends: 32 [2022-07-21 01:48:49,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:48:49,883 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:49,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 118 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:48:49,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-21 01:48:49,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-21 01:48:49,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:48:49,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-21 01:48:49,898 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 15 [2022-07-21 01:48:49,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:49,899 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-21 01:48:49,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:49,900 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-21 01:48:49,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 01:48:49,902 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:49,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:49,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 01:48:49,906 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:49,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:49,907 INFO L85 PathProgramCache]: Analyzing trace with hash -118167546, now seen corresponding path program 1 times [2022-07-21 01:48:49,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:48:49,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242228863] [2022-07-21 01:48:49,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:49,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:48:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:49,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 01:48:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:48:50,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 01:48:50,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242228863] [2022-07-21 01:48:50,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242228863] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:50,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:50,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 01:48:50,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732732968] [2022-07-21 01:48:50,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:50,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 01:48:50,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 01:48:50,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 01:48:50,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:48:50,006 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:50,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:50,033 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-07-21 01:48:50,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 01:48:50,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-21 01:48:50,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:50,035 INFO L225 Difference]: With dead ends: 45 [2022-07-21 01:48:50,035 INFO L226 Difference]: Without dead ends: 36 [2022-07-21 01:48:50,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:48:50,040 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:50,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 134 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:48:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-21 01:48:50,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-07-21 01:48:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:48:50,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-21 01:48:50,047 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 16 [2022-07-21 01:48:50,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:50,048 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-21 01:48:50,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:50,048 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-21 01:48:50,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 01:48:50,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:50,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:50,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 01:48:50,051 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:50,053 INFO L85 PathProgramCache]: Analyzing trace with hash -774061834, now seen corresponding path program 1 times [2022-07-21 01:48:50,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:48:50,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272812736] [2022-07-21 01:48:50,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:50,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:48:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:50,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 01:48:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:48:50,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 01:48:50,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272812736] [2022-07-21 01:48:50,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272812736] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:50,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:50,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 01:48:50,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732713982] [2022-07-21 01:48:50,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:50,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 01:48:50,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 01:48:50,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 01:48:50,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:48:50,134 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:50,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:50,170 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-07-21 01:48:50,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 01:48:50,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-21 01:48:50,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:50,171 INFO L225 Difference]: With dead ends: 45 [2022-07-21 01:48:50,171 INFO L226 Difference]: Without dead ends: 36 [2022-07-21 01:48:50,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:48:50,172 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:50,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 134 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:48:50,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-21 01:48:50,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-07-21 01:48:50,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:48:50,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-21 01:48:50,175 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2022-07-21 01:48:50,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:50,175 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-21 01:48:50,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:50,176 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-21 01:48:50,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 01:48:50,176 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:50,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:50,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 01:48:50,176 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:50,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:50,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1728168458, now seen corresponding path program 1 times [2022-07-21 01:48:50,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:48:50,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736957118] [2022-07-21 01:48:50,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:50,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:48:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:50,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 01:48:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:48:50,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 01:48:50,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736957118] [2022-07-21 01:48:50,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736957118] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:50,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:50,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 01:48:50,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837524319] [2022-07-21 01:48:50,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:50,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 01:48:50,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 01:48:50,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 01:48:50,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:48:50,240 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:50,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:50,278 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-07-21 01:48:50,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 01:48:50,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-07-21 01:48:50,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:50,279 INFO L225 Difference]: With dead ends: 45 [2022-07-21 01:48:50,279 INFO L226 Difference]: Without dead ends: 36 [2022-07-21 01:48:50,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:48:50,280 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:50,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 134 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:48:50,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-21 01:48:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-07-21 01:48:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:48:50,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-21 01:48:50,284 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 18 [2022-07-21 01:48:50,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:50,284 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-21 01:48:50,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:50,284 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-21 01:48:50,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 01:48:50,284 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:50,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:50,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 01:48:50,285 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:50,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:50,285 INFO L85 PathProgramCache]: Analyzing trace with hash -79286005, now seen corresponding path program 1 times [2022-07-21 01:48:50,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:48:50,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596512079] [2022-07-21 01:48:50,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:50,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:48:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 01:48:50,300 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 01:48:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 01:48:50,320 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 01:48:50,320 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 01:48:50,321 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-21 01:48:50,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 01:48:50,324 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 01:48:50,326 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 01:48:50,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:48:50 BoogieIcfgContainer [2022-07-21 01:48:50,342 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 01:48:50,342 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 01:48:50,342 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 01:48:50,342 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 01:48:50,343 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:48:49" (3/4) ... [2022-07-21 01:48:50,344 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-21 01:48:50,345 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 01:48:50,345 INFO L158 Benchmark]: Toolchain (without parser) took 1646.55ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 35.2MB in the beginning and 30.0MB in the end (delta: 5.2MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. [2022-07-21 01:48:50,345 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 56.6MB. Free memory was 38.4MB in the beginning and 38.4MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:48:50,345 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.84ms. Allocated memory is still 56.6MB. Free memory was 35.1MB in the beginning and 39.5MB in the end (delta: -4.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 01:48:50,346 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.75ms. Allocated memory is still 56.6MB. Free memory was 39.3MB in the beginning and 37.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 01:48:50,346 INFO L158 Benchmark]: Boogie Preprocessor took 33.61ms. Allocated memory is still 56.6MB. Free memory was 37.7MB in the beginning and 36.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 01:48:50,346 INFO L158 Benchmark]: RCFGBuilder took 256.51ms. Allocated memory is still 56.6MB. Free memory was 36.4MB in the beginning and 24.9MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-21 01:48:50,346 INFO L158 Benchmark]: TraceAbstraction took 1085.80ms. Allocated memory is still 69.2MB. Free memory was 52.0MB in the beginning and 30.4MB in the end (delta: 21.6MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. [2022-07-21 01:48:50,347 INFO L158 Benchmark]: Witness Printer took 2.39ms. Allocated memory is still 69.2MB. Free memory was 30.4MB in the beginning and 30.0MB in the end (delta: 338.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:48:50,348 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 56.6MB. Free memory was 38.4MB in the beginning and 38.4MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 220.84ms. Allocated memory is still 56.6MB. Free memory was 35.1MB in the beginning and 39.5MB in the end (delta: -4.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.75ms. Allocated memory is still 56.6MB. Free memory was 39.3MB in the beginning and 37.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.61ms. Allocated memory is still 56.6MB. Free memory was 37.7MB in the beginning and 36.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 256.51ms. Allocated memory is still 56.6MB. Free memory was 36.4MB in the beginning and 24.9MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1085.80ms. Allocated memory is still 69.2MB. Free memory was 52.0MB in the beginning and 30.4MB in the end (delta: 21.6MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. * Witness Printer took 2.39ms. Allocated memory is still 69.2MB. Free memory was 30.4MB in the beginning and 30.0MB in the end (delta: 338.0kB). There was no memory consumed. Max. memory is 16.1GB. * 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: 82]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 81, overapproximation of someUnaryDOUBLEoperation at line 76. Possible FailurePath: [L76] double x = -0.0; [L77] double y = 0.0; [L78] CALL, EXPR fmin_double(x, y) [L48] CALL, EXPR __fpclassify_double(x) VAL [\old(x)=4294967298] [L21] __uint32_t msw, lsw; VAL [\old(x)=4294967298, x=4294967298] [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) VAL [\old(x)=4294967298, lsw=4294967297, msw=4293918721, x=4294967298] [L33-L34] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) VAL [\old(x)=4294967298, lsw=4294967297, msw=4293918721, x=4294967298] [L36-L37] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) VAL [\old(x)=4294967298, lsw=4294967297, msw=4293918721, x=4294967298] [L40-L41] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L44] return 0; VAL [\old(x)=4294967298, \result=0, lsw=4294967297, msw=4293918721, x=4294967298] [L48] RET, EXPR __fpclassify_double(x) VAL [\old(x)=4294967298, \old(y)=0, __fpclassify_double(x)=0, x=4294967298, y=0] [L48] COND TRUE __fpclassify_double(x) == 0 [L49] return y; VAL [\old(x)=4294967298, \old(y)=0, \result=0, x=4294967298, y=0] [L78] RET, EXPR fmin_double(x, y) [L78] double res = fmin_double(x, y); [L81] EXPR res == -0.0 && __signbit_double(res) == 1 VAL [res=0, res == -0.0 && __signbit_double(res) == 1=0, x=4294967298, y=0] [L81] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L82] reach_error() VAL [res=0, x=4294967298, y=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.0s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5 mSDsluCounter, 591 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 406 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 95 IncrementalHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 185 mSDtfsCounter, 95 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=2, InterpolantAutomatonStates: 23, 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, 5 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 75 ConstructedInterpolants, 0 QuantifiedInterpolants, 207 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 [2022-07-21 01:48:50,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e29f062842798044f4f77e299bc6043cf6e874a22c0b9b512a8e0e54ddd042d9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 01:48:51,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 01:48:51,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 01:48:51,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 01:48:51,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 01:48:51,924 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 01:48:51,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 01:48:51,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 01:48:51,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 01:48:51,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 01:48:51,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 01:48:51,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 01:48:51,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 01:48:51,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 01:48:51,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 01:48:51,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 01:48:51,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 01:48:51,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 01:48:51,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 01:48:51,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 01:48:51,952 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 01:48:51,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 01:48:51,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 01:48:51,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 01:48:51,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 01:48:51,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 01:48:51,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 01:48:51,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 01:48:51,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 01:48:51,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 01:48:51,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 01:48:51,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 01:48:51,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 01:48:51,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 01:48:51,965 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 01:48:51,966 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 01:48:51,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 01:48:51,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 01:48:51,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 01:48:51,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 01:48:51,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 01:48:51,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 01:48:51,975 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-21 01:48:52,002 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 01:48:52,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 01:48:52,003 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 01:48:52,004 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 01:48:52,004 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 01:48:52,004 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 01:48:52,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 01:48:52,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 01:48:52,005 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 01:48:52,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 01:48:52,006 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 01:48:52,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 01:48:52,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 01:48:52,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 01:48:52,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 01:48:52,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 01:48:52,007 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 01:48:52,008 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 01:48:52,008 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 01:48:52,008 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 01:48:52,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 01:48:52,008 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 01:48:52,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 01:48:52,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 01:48:52,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 01:48:52,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 01:48:52,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 01:48:52,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 01:48:52,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 01:48:52,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 01:48:52,010 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 01:48:52,010 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 01:48:52,010 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 01:48:52,010 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 01:48:52,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 01:48:52,011 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 01:48:52,011 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e29f062842798044f4f77e299bc6043cf6e874a22c0b9b512a8e0e54ddd042d9 [2022-07-21 01:48:52,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 01:48:52,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 01:48:52,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 01:48:52,297 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 01:48:52,298 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 01:48:52,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2022-07-21 01:48:52,343 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e35f12aee/4f56440d51784033820f567559552641/FLAGb512e15a1 [2022-07-21 01:48:52,644 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 01:48:52,644 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2022-07-21 01:48:52,649 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e35f12aee/4f56440d51784033820f567559552641/FLAGb512e15a1 [2022-07-21 01:48:53,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e35f12aee/4f56440d51784033820f567559552641 [2022-07-21 01:48:53,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 01:48:53,090 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 01:48:53,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 01:48:53,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 01:48:53,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 01:48:53,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4924ff01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53, skipping insertion in model container [2022-07-21 01:48:53,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 01:48:53,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 01:48:53,256 WARN L230 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/double_req_bl_1232b.c[1958,1971] [2022-07-21 01:48:53,260 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 01:48:53,275 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 01:48:53,329 WARN L230 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/double_req_bl_1232b.c[1958,1971] [2022-07-21 01:48:53,331 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 01:48:53,344 INFO L208 MainTranslator]: Completed translation [2022-07-21 01:48:53,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53 WrapperNode [2022-07-21 01:48:53,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 01:48:53,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 01:48:53,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 01:48:53,346 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 01:48:53,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,360 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,377 INFO L137 Inliner]: procedures = 22, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2022-07-21 01:48:53,378 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 01:48:53,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 01:48:53,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 01:48:53,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 01:48:53,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 01:48:53,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 01:48:53,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 01:48:53,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 01:48:53,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 01:48:53,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 01:48:53,448 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) [2022-07-21 01:48:53,471 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 [2022-07-21 01:48:53,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 01:48:53,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2022-07-21 01:48:53,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 01:48:53,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 01:48:53,477 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2022-07-21 01:48:53,477 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2022-07-21 01:48:53,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-21 01:48:53,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 01:48:53,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 01:48:53,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 01:48:53,533 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 01:48:53,534 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 01:48:53,740 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 01:48:53,748 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 01:48:53,750 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 01:48:53,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:48:53 BoogieIcfgContainer [2022-07-21 01:48:53,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 01:48:53,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 01:48:53,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 01:48:53,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 01:48:53,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:48:53" (1/3) ... [2022-07-21 01:48:53,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b47ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:48:53, skipping insertion in model container [2022-07-21 01:48:53,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (2/3) ... [2022-07-21 01:48:53,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b47ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:48:53, skipping insertion in model container [2022-07-21 01:48:53,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:48:53" (3/3) ... [2022-07-21 01:48:53,760 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1232b.c [2022-07-21 01:48:53,769 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 01:48:53,770 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 01:48:53,821 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 01:48:53,829 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1f8366f3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@549e43db [2022-07-21 01:48:53,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 01:48:53,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 01:48:53,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 01:48:53,838 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:53,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:53,840 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:53,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:53,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1130952206, now seen corresponding path program 1 times [2022-07-21 01:48:53,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:48:53,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980780477] [2022-07-21 01:48:53,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:53,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:48:53,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:48:53,856 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:48:53,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 01:48:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:53,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-21 01:48:53,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:48:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:48:53,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:48:53,932 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:48:53,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980780477] [2022-07-21 01:48:53,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980780477] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:53,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:53,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 01:48:53,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752953950] [2022-07-21 01:48:53,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:53,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 01:48:53,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:48:53,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 01:48:53,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 01:48:53,956 INFO L87 Difference]: Start difference. First operand has 29 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:53,969 INFO L93 Difference]: Finished difference Result 55 states and 82 transitions. [2022-07-21 01:48:53,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 01:48:53,970 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-07-21 01:48:53,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:53,975 INFO L225 Difference]: With dead ends: 55 [2022-07-21 01:48:53,975 INFO L226 Difference]: Without dead ends: 26 [2022-07-21 01:48:53,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 01:48:53,979 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:53,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:48:53,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-21 01:48:54,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-21 01:48:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 01:48:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-07-21 01:48:54,021 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 13 [2022-07-21 01:48:54,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:54,022 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-07-21 01:48:54,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:54,022 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-07-21 01:48:54,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 01:48:54,024 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:54,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:54,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-21 01:48:54,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:48:54,236 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:54,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1285201507, now seen corresponding path program 1 times [2022-07-21 01:48:54,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:48:54,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159350094] [2022-07-21 01:48:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:54,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:48:54,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:48:54,240 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:48:54,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 01:48:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:54,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 01:48:54,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:48:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:48:54,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:48:54,309 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:48:54,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159350094] [2022-07-21 01:48:54,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159350094] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:54,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:54,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 01:48:54,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217253192] [2022-07-21 01:48:54,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:54,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 01:48:54,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:48:54,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 01:48:54,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:48:54,312 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:54,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:54,329 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-07-21 01:48:54,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 01:48:54,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-07-21 01:48:54,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:54,332 INFO L225 Difference]: With dead ends: 38 [2022-07-21 01:48:54,332 INFO L226 Difference]: Without dead ends: 29 [2022-07-21 01:48:54,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:48:54,334 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:54,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 90 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:48:54,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-21 01:48:54,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-21 01:48:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:48:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2022-07-21 01:48:54,339 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2022-07-21 01:48:54,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:54,339 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2022-07-21 01:48:54,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2022-07-21 01:48:54,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 01:48:54,340 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:54,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:54,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 01:48:54,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:48:54,548 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:54,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:54,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1497908235, now seen corresponding path program 1 times [2022-07-21 01:48:54,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:48:54,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027995632] [2022-07-21 01:48:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:54,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:48:54,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:48:54,551 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:48:54,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 01:48:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:54,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 01:48:54,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:48:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:48:54,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:48:54,741 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:48:54,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027995632] [2022-07-21 01:48:54,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027995632] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:54,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:54,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 01:48:54,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339056597] [2022-07-21 01:48:54,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:54,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 01:48:54,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:48:54,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 01:48:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 01:48:54,742 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:54,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:54,862 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2022-07-21 01:48:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 01:48:54,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-21 01:48:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:54,863 INFO L225 Difference]: With dead ends: 56 [2022-07-21 01:48:54,863 INFO L226 Difference]: Without dead ends: 31 [2022-07-21 01:48:54,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 01:48:54,864 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 18 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:54,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 102 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-07-21 01:48:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-21 01:48:54,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-21 01:48:54,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 01:48:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-07-21 01:48:54,868 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 15 [2022-07-21 01:48:54,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:54,869 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-07-21 01:48:54,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:54,869 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-07-21 01:48:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 01:48:54,869 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:54,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:54,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-21 01:48:55,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:48:55,076 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:55,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:55,077 INFO L85 PathProgramCache]: Analyzing trace with hash -2116811041, now seen corresponding path program 1 times [2022-07-21 01:48:55,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:48:55,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867251036] [2022-07-21 01:48:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:55,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:48:55,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:48:55,078 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:48:55,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-21 01:48:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:55,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 01:48:55,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:48:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:48:55,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:48:55,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:48:55,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867251036] [2022-07-21 01:48:55,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867251036] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:55,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:55,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 01:48:55,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949775193] [2022-07-21 01:48:55,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:55,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 01:48:55,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:48:55,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 01:48:55,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:48:55,136 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:55,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:55,529 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-07-21 01:48:55,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 01:48:55,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-21 01:48:55,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:55,531 INFO L225 Difference]: With dead ends: 43 [2022-07-21 01:48:55,531 INFO L226 Difference]: Without dead ends: 34 [2022-07-21 01:48:55,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:48:55,532 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:55,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 99 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 01:48:55,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-21 01:48:55,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2022-07-21 01:48:55,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 01:48:55,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-07-21 01:48:55,537 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 16 [2022-07-21 01:48:55,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:55,537 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-07-21 01:48:55,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:55,538 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-07-21 01:48:55,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 01:48:55,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:55,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:55,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-21 01:48:55,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:48:55,746 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:55,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:55,747 INFO L85 PathProgramCache]: Analyzing trace with hash 172315143, now seen corresponding path program 1 times [2022-07-21 01:48:55,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:48:55,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237110978] [2022-07-21 01:48:55,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:55,747 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:48:55,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:48:55,748 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:48:55,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-21 01:48:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:55,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 01:48:55,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:48:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:48:55,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:48:55,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:48:55,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237110978] [2022-07-21 01:48:55,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237110978] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:55,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:55,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 01:48:55,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122911165] [2022-07-21 01:48:55,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:55,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 01:48:55,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:48:55,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 01:48:55,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 01:48:55,955 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:55,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:55,996 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-07-21 01:48:55,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 01:48:55,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-21 01:48:55,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:55,997 INFO L225 Difference]: With dead ends: 57 [2022-07-21 01:48:55,997 INFO L226 Difference]: Without dead ends: 30 [2022-07-21 01:48:55,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 01:48:55,998 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:55,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 88 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2022-07-21 01:48:55,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-21 01:48:56,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-07-21 01:48:56,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 01:48:56,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-07-21 01:48:56,001 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 17 [2022-07-21 01:48:56,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:56,002 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-07-21 01:48:56,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:56,002 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-07-21 01:48:56,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 01:48:56,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:56,002 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:56,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-21 01:48:56,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:48:56,210 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:56,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:56,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1943218574, now seen corresponding path program 1 times [2022-07-21 01:48:56,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:48:56,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125434460] [2022-07-21 01:48:56,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:56,211 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:48:56,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:48:56,212 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:48:56,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-21 01:48:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:56,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 01:48:56,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:48:56,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 01:48:56,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:48:56,283 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:48:56,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125434460] [2022-07-21 01:48:56,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125434460] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:56,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:56,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 01:48:56,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374096718] [2022-07-21 01:48:56,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:56,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 01:48:56,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:48:56,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 01:48:56,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:48:56,286 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:48:56,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:56,388 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-07-21 01:48:56,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 01:48:56,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-07-21 01:48:56,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:56,390 INFO L225 Difference]: With dead ends: 40 [2022-07-21 01:48:56,391 INFO L226 Difference]: Without dead ends: 31 [2022-07-21 01:48:56,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:48:56,391 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:56,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 01:48:56,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-21 01:48:56,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-21 01:48:56,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 01:48:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-07-21 01:48:56,396 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 22 [2022-07-21 01:48:56,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:56,396 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-07-21 01:48:56,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:48:56,396 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-07-21 01:48:56,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 01:48:56,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:56,397 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:56,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-21 01:48:56,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:48:56,604 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:56,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:56,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1682849308, now seen corresponding path program 1 times [2022-07-21 01:48:56,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:48:56,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019378241] [2022-07-21 01:48:56,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:56,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:48:56,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:48:56,606 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:48:56,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-21 01:48:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:56,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 01:48:56,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:48:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 01:48:56,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:48:56,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:48:56,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019378241] [2022-07-21 01:48:56,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019378241] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:56,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:56,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 01:48:56,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596803779] [2022-07-21 01:48:56,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:56,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 01:48:56,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:48:56,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 01:48:56,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 01:48:56,813 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:48:56,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:56,843 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-07-21 01:48:56,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 01:48:56,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-07-21 01:48:56,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:56,846 INFO L225 Difference]: With dead ends: 45 [2022-07-21 01:48:56,846 INFO L226 Difference]: Without dead ends: 31 [2022-07-21 01:48:56,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 01:48:56,847 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:56,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 102 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-07-21 01:48:56,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-21 01:48:56,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-21 01:48:56,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 01:48:56,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-07-21 01:48:56,850 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 23 [2022-07-21 01:48:56,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:56,850 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-07-21 01:48:56,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:48:56,851 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-07-21 01:48:56,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 01:48:56,851 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:56,851 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:56,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-21 01:48:57,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:48:57,061 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:57,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:57,062 INFO L85 PathProgramCache]: Analyzing trace with hash 474937390, now seen corresponding path program 1 times [2022-07-21 01:48:57,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:48:57,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467734585] [2022-07-21 01:48:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:57,062 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:48:57,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:48:57,063 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:48:57,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-21 01:48:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:57,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 01:48:57,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:48:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 01:48:57,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:48:57,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:48:57,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467734585] [2022-07-21 01:48:57,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467734585] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:57,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:57,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 01:48:57,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181525993] [2022-07-21 01:48:57,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:57,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 01:48:57,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:48:57,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 01:48:57,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:48:57,131 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:48:57,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:57,156 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-07-21 01:48:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 01:48:57,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-21 01:48:57,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:57,157 INFO L225 Difference]: With dead ends: 41 [2022-07-21 01:48:57,157 INFO L226 Difference]: Without dead ends: 32 [2022-07-21 01:48:57,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:48:57,158 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:57,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 94 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:48:57,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-21 01:48:57,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2022-07-21 01:48:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 01:48:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-07-21 01:48:57,161 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2022-07-21 01:48:57,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:57,161 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-07-21 01:48:57,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:48:57,161 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-07-21 01:48:57,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 01:48:57,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:57,162 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:57,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-21 01:48:57,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:48:57,363 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:57,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:57,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1777787178, now seen corresponding path program 1 times [2022-07-21 01:48:57,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:48:57,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947489333] [2022-07-21 01:48:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:57,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:48:57,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:48:57,365 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:48:57,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-21 01:48:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:57,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 01:48:57,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:48:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 01:48:57,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:48:57,468 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:48:57,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947489333] [2022-07-21 01:48:57,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947489333] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:57,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:57,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 01:48:57,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679639193] [2022-07-21 01:48:57,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:57,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 01:48:57,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:48:57,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 01:48:57,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 01:48:57,470 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:48:57,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:57,557 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-07-21 01:48:57,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 01:48:57,558 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-21 01:48:57,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:57,558 INFO L225 Difference]: With dead ends: 42 [2022-07-21 01:48:57,558 INFO L226 Difference]: Without dead ends: 39 [2022-07-21 01:48:57,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-21 01:48:57,559 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 34 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:57,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 114 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:48:57,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-21 01:48:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-07-21 01:48:57,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 01:48:57,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-07-21 01:48:57,562 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 24 [2022-07-21 01:48:57,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:57,563 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-07-21 01:48:57,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:48:57,563 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-07-21 01:48:57,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 01:48:57,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:57,564 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:57,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-21 01:48:57,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:48:57,777 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:57,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:57,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1835045480, now seen corresponding path program 1 times [2022-07-21 01:48:57,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:48:57,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297172001] [2022-07-21 01:48:57,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:57,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:48:57,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:48:57,779 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:48:57,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-21 01:48:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:57,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 01:48:57,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:48:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 01:48:57,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:48:57,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:48:57,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297172001] [2022-07-21 01:48:57,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297172001] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:57,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:57,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 01:48:57,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403820815] [2022-07-21 01:48:57,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:57,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 01:48:57,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:48:57,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 01:48:57,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 01:48:57,864 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:48:57,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:57,871 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-07-21 01:48:57,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 01:48:57,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-21 01:48:57,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:57,872 INFO L225 Difference]: With dead ends: 41 [2022-07-21 01:48:57,872 INFO L226 Difference]: Without dead ends: 31 [2022-07-21 01:48:57,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 01:48:57,873 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:57,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 41 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:48:57,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-21 01:48:57,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-21 01:48:57,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 01:48:57,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-07-21 01:48:57,875 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 24 [2022-07-21 01:48:57,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:57,876 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-07-21 01:48:57,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:48:57,876 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-07-21 01:48:57,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 01:48:57,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:57,876 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:57,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-21 01:48:58,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:48:58,085 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:58,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:58,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1323122336, now seen corresponding path program 1 times [2022-07-21 01:48:58,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:48:58,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470215614] [2022-07-21 01:48:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:58,085 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:48:58,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:48:58,086 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:48:58,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-21 01:48:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:58,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 01:48:58,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:48:58,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 01:48:58,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:48:58,231 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:48:58,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470215614] [2022-07-21 01:48:58,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470215614] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:58,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:58,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 01:48:58,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525733905] [2022-07-21 01:48:58,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:58,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 01:48:58,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:48:58,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 01:48:58,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 01:48:58,233 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:48:58,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:58,287 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-07-21 01:48:58,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 01:48:58,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-07-21 01:48:58,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:58,288 INFO L225 Difference]: With dead ends: 42 [2022-07-21 01:48:58,288 INFO L226 Difference]: Without dead ends: 25 [2022-07-21 01:48:58,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 01:48:58,289 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:58,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 84 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 16 Unchecked, 0.0s Time] [2022-07-21 01:48:58,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-21 01:48:58,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-21 01:48:58,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 01:48:58,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-07-21 01:48:58,291 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 25 [2022-07-21 01:48:58,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:58,291 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-07-21 01:48:58,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:48:58,291 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-07-21 01:48:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 01:48:58,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:58,292 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:58,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-07-21 01:48:58,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:48:58,500 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:58,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:58,500 INFO L85 PathProgramCache]: Analyzing trace with hash 2065734315, now seen corresponding path program 1 times [2022-07-21 01:48:58,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:48:58,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035329714] [2022-07-21 01:48:58,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:58,501 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:48:58,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:48:58,504 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:48:58,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-21 01:48:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 01:48:58,579 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 01:48:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 01:48:58,639 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-07-21 01:48:58,639 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 01:48:58,640 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-21 01:48:58,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-21 01:48:58,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:48:58,844 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:58,846 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 01:48:58,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:48:58 BoogieIcfgContainer [2022-07-21 01:48:58,867 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 01:48:58,868 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 01:48:58,868 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 01:48:58,868 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 01:48:58,868 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:48:53" (3/4) ... [2022-07-21 01:48:58,869 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-21 01:48:58,899 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 01:48:58,899 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 01:48:58,899 INFO L158 Benchmark]: Toolchain (without parser) took 5809.56ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 38.1MB in the beginning and 42.1MB in the end (delta: -4.0MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2022-07-21 01:48:58,899 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 58.7MB. Free memory was 40.9MB in the beginning and 40.9MB in the end (delta: 42.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:48:58,899 INFO L158 Benchmark]: CACSL2BoogieTranslator took 253.03ms. Allocated memory is still 58.7MB. Free memory was 37.9MB in the beginning and 41.2MB in the end (delta: -3.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 01:48:58,900 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.28ms. Allocated memory is still 58.7MB. Free memory was 41.2MB in the beginning and 39.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:48:58,900 INFO L158 Benchmark]: Boogie Preprocessor took 44.46ms. Allocated memory is still 58.7MB. Free memory was 39.6MB in the beginning and 38.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 01:48:58,900 INFO L158 Benchmark]: RCFGBuilder took 328.56ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 38.0MB in the beginning and 53.8MB in the end (delta: -15.7MB). Peak memory consumption was 16.2MB. Max. memory is 16.1GB. [2022-07-21 01:48:58,900 INFO L158 Benchmark]: TraceAbstraction took 5113.63ms. Allocated memory is still 71.3MB. Free memory was 53.2MB in the beginning and 44.2MB in the end (delta: 9.0MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. [2022-07-21 01:48:58,901 INFO L158 Benchmark]: Witness Printer took 31.13ms. Allocated memory is still 71.3MB. Free memory was 44.2MB in the beginning and 42.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 01:48:58,902 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 58.7MB. Free memory was 40.9MB in the beginning and 40.9MB in the end (delta: 42.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 253.03ms. Allocated memory is still 58.7MB. Free memory was 37.9MB in the beginning and 41.2MB in the end (delta: -3.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.28ms. Allocated memory is still 58.7MB. Free memory was 41.2MB in the beginning and 39.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 44.46ms. Allocated memory is still 58.7MB. Free memory was 39.6MB in the beginning and 38.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 328.56ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 38.0MB in the beginning and 53.8MB in the end (delta: -15.7MB). Peak memory consumption was 16.2MB. Max. memory is 16.1GB. * TraceAbstraction took 5113.63ms. Allocated memory is still 71.3MB. Free memory was 53.2MB in the beginning and 44.2MB in the end (delta: 9.0MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. * Witness Printer took 31.13ms. Allocated memory is still 71.3MB. Free memory was 44.2MB in the beginning and 42.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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 - CounterExampleResult [Line: 82]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L76] double x = -0.0; [L77] double y = 0.0; [L78] CALL, EXPR fmin_double(x, y) [L48] CALL, EXPR __fpclassify_double(x) VAL [\old(x)=0.0] [L21] __uint32_t msw, lsw; VAL [\old(x)=0.0, x=0.0] [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L32] return 2; VAL [\old(x)=0.0, \result=2, lsw=0, msw=-2147483648, x=0.0] [L48] RET, EXPR __fpclassify_double(x) VAL [\old(x)=0.0, \old(y)=0.0, __fpclassify_double(x)=2, x=0.0, y=0.0] [L48] COND FALSE !(__fpclassify_double(x) == 0) [L50] CALL, EXPR __fpclassify_double(y) VAL [\old(x)=0.0] [L21] __uint32_t msw, lsw; VAL [\old(x)=0.0, x=0.0] [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L32] return 2; VAL [\old(x)=0.0, \result=2, lsw=0, msw=0, x=0.0] [L50] RET, EXPR __fpclassify_double(y) VAL [\old(x)=0.0, \old(y)=0.0, __fpclassify_double(y)=2, x=0.0, y=0.0] [L50] COND FALSE !(__fpclassify_double(y) == 0) [L53] EXPR x < y ? x : y VAL [\old(x)=0.0, \old(y)=0.0, x=0.0, x < y ? x : y=0.0, y=0.0] [L53] return x < y ? x : y; [L78] RET, EXPR fmin_double(x, y) [L78] double res = fmin_double(x, y); [L81] EXPR res == -0.0 && __signbit_double(res) == 1 [L81] CALL, EXPR __signbit_double(res) [L57] __uint32_t msw; VAL [\old(x)=0.0, x=0.0] [L60] ieee_double_shape_type gh_u; [L61] gh_u.value = (x) [L62] EXPR gh_u.parts.msw [L62] (msw) = gh_u.parts.msw [L65] return (msw & 0x80000000) != 0; VAL [\old(x)=0.0, \result=0, msw=0, x=0.0] [L81] RET, EXPR __signbit_double(res) [L81] EXPR res == -0.0 && __signbit_double(res) == 1 VAL [__signbit_double(res)=0, res=0.0, res == -0.0 && __signbit_double(res) == 1=0, x=0.0, y=0.0] [L81] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L82] reach_error() VAL [res=0.0, x=0.0, y=0.0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.0s, OverallIterations: 12, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 118 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 112 mSDsluCounter, 938 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 85 IncrementalHoareTripleChecker+Unchecked, 605 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 116 IncrementalHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 333 mSDtfsCounter, 116 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 214 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=9, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 15 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 245 NumberOfCodeBlocks, 245 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 206 ConstructedInterpolants, 24 QuantifiedInterpolants, 725 SizeOfPredicates, 35 NumberOfNonLiveVariables, 787 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 PerfectInterpolantSequences, 36/36 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 proved your program to be incorrect! [2022-07-21 01:48:58,933 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE