./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/float_req_bl_1231.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/float_req_bl_1231.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 7acfe881669b731d03fc8aee9db955b71d947923db9c9de4e28fcb386b44b191 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 14:34:30,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 14:34:30,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 14:34:30,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 14:34:30,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 14:34:30,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 14:34:30,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 14:34:30,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 14:34:30,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 14:34:30,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 14:34:30,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 14:34:30,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 14:34:30,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 14:34:30,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 14:34:30,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 14:34:30,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 14:34:30,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 14:34:30,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 14:34:30,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 14:34:30,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 14:34:30,762 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 14:34:30,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 14:34:30,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 14:34:30,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 14:34:30,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 14:34:30,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 14:34:30,767 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 14:34:30,767 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 14:34:30,768 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 14:34:30,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 14:34:30,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 14:34:30,769 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 14:34:30,770 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 14:34:30,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 14:34:30,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 14:34:30,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 14:34:30,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 14:34:30,772 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 14:34:30,772 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 14:34:30,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 14:34:30,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 14:34:30,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 14:34:30,774 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 14:34:30,789 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 14:34:30,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 14:34:30,790 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 14:34:30,790 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 14:34:30,790 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 14:34:30,791 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 14:34:30,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 14:34:30,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 14:34:30,791 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 14:34:30,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 14:34:30,792 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 14:34:30,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 14:34:30,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 14:34:30,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 14:34:30,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 14:34:30,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 14:34:30,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 14:34:30,793 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 14:34:30,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 14:34:30,793 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 14:34:30,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 14:34:30,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 14:34:30,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 14:34:30,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 14:34:30,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 14:34:30,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 14:34:30,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 14:34:30,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 14:34:30,795 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 14:34:30,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 14:34:30,795 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 14:34:30,796 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 14:34:30,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 14:34:30,796 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7acfe881669b731d03fc8aee9db955b71d947923db9c9de4e28fcb386b44b191 [2022-07-22 14:34:31,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 14:34:31,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 14:34:31,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 14:34:31,033 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 14:34:31,034 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 14:34:31,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1231.c [2022-07-22 14:34:31,099 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2588a6832/4f9aaaa7cad443b6bf0c8cb4e71bf346/FLAG455a640fa [2022-07-22 14:34:31,435 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 14:34:31,436 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1231.c [2022-07-22 14:34:31,450 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2588a6832/4f9aaaa7cad443b6bf0c8cb4e71bf346/FLAG455a640fa [2022-07-22 14:34:31,458 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2588a6832/4f9aaaa7cad443b6bf0c8cb4e71bf346 [2022-07-22 14:34:31,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 14:34:31,460 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 14:34:31,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 14:34:31,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 14:34:31,465 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 14:34:31,465 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 02:34:31" (1/1) ... [2022-07-22 14:34:31,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3100943f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:31, skipping insertion in model container [2022-07-22 14:34:31,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 02:34:31" (1/1) ... [2022-07-22 14:34:31,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 14:34:31,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 14:34:31,608 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/float_req_bl_1231.c[1835,1848] [2022-07-22 14:34:31,610 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/float_req_bl_1231.c[1994,2007] [2022-07-22 14:34:31,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 14:34:31,615 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 14:34:31,630 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/float_req_bl_1231.c[1835,1848] [2022-07-22 14:34:31,630 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/float_req_bl_1231.c[1994,2007] [2022-07-22 14:34:31,631 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 14:34:31,639 INFO L208 MainTranslator]: Completed translation [2022-07-22 14:34:31,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:31 WrapperNode [2022-07-22 14:34:31,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 14:34:31,641 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 14:34:31,641 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 14:34:31,641 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 14:34:31,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:31" (1/1) ... [2022-07-22 14:34:31,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:31" (1/1) ... [2022-07-22 14:34:31,666 INFO L137 Inliner]: procedures = 19, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 107 [2022-07-22 14:34:31,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 14:34:31,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 14:34:31,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 14:34:31,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 14:34:31,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:31" (1/1) ... [2022-07-22 14:34:31,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:31" (1/1) ... [2022-07-22 14:34:31,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:31" (1/1) ... [2022-07-22 14:34:31,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:31" (1/1) ... [2022-07-22 14:34:31,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:31" (1/1) ... [2022-07-22 14:34:31,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:31" (1/1) ... [2022-07-22 14:34:31,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:31" (1/1) ... [2022-07-22 14:34:31,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 14:34:31,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 14:34:31,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 14:34:31,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 14:34:31,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:31" (1/1) ... [2022-07-22 14:34:31,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 14:34:31,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 14:34:31,722 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) [2022-07-22 14:34:31,741 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 [2022-07-22 14:34:31,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 14:34:31,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 14:34:31,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 14:34:31,751 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2022-07-22 14:34:31,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2022-07-22 14:34:31,752 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2022-07-22 14:34:31,752 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2022-07-22 14:34:31,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-07-22 14:34:31,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 14:34:31,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 14:34:31,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 14:34:31,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 14:34:31,799 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 14:34:31,800 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 14:34:31,993 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 14:34:32,011 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 14:34:32,012 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 14:34:32,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 02:34:32 BoogieIcfgContainer [2022-07-22 14:34:32,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 14:34:32,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 14:34:32,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 14:34:32,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 14:34:32,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 02:34:31" (1/3) ... [2022-07-22 14:34:32,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106f7115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 02:34:32, skipping insertion in model container [2022-07-22 14:34:32,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:31" (2/3) ... [2022-07-22 14:34:32,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106f7115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 02:34:32, skipping insertion in model container [2022-07-22 14:34:32,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 02:34:32" (3/3) ... [2022-07-22 14:34:32,027 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1231.c [2022-07-22 14:34:32,036 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 14:34:32,037 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 14:34:32,070 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 14:34:32,075 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@6caa3bc6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6a0fd053 [2022-07-22 14:34:32,075 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 14:34:32,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 44 states have internal predecessors, (61), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-22 14:34:32,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 14:34:32,084 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:32,085 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:32,085 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:32,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:32,089 INFO L85 PathProgramCache]: Analyzing trace with hash -625969503, now seen corresponding path program 1 times [2022-07-22 14:34:32,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 14:34:32,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079870859] [2022-07-22 14:34:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:32,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 14:34:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:32,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 14:34:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:32,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 14:34:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:32,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 14:34:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 14:34:32,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 14:34:32,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079870859] [2022-07-22 14:34:32,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079870859] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:32,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:32,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 14:34:32,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828358870] [2022-07-22 14:34:32,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:32,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 14:34:32,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 14:34:32,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 14:34:32,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 14:34:32,253 INFO L87 Difference]: Start difference. First operand has 57 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 44 states have internal predecessors, (61), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 14:34:32,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:32,382 INFO L93 Difference]: Finished difference Result 108 states and 156 transitions. [2022-07-22 14:34:32,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 14:34:32,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-07-22 14:34:32,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:32,390 INFO L225 Difference]: With dead ends: 108 [2022-07-22 14:34:32,390 INFO L226 Difference]: Without dead ends: 62 [2022-07-22 14:34:32,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 14:34:32,395 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 19 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:32,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 245 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 14:34:32,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-22 14:34:32,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2022-07-22 14:34:32,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-22 14:34:32,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2022-07-22 14:34:32,423 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 28 [2022-07-22 14:34:32,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:32,423 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2022-07-22 14:34:32,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 14:34:32,423 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2022-07-22 14:34:32,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-22 14:34:32,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:32,425 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:32,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 14:34:32,425 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:32,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:32,426 INFO L85 PathProgramCache]: Analyzing trace with hash 716059, now seen corresponding path program 1 times [2022-07-22 14:34:32,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 14:34:32,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455632561] [2022-07-22 14:34:32,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:32,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 14:34:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:32,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 14:34:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:32,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 14:34:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:32,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 14:34:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:32,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 14:34:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 14:34:32,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 14:34:32,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455632561] [2022-07-22 14:34:32,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455632561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:32,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:32,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 14:34:32,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855723911] [2022-07-22 14:34:32,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:32,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 14:34:32,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 14:34:32,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 14:34:32,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 14:34:32,583 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 14:34:32,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:32,649 INFO L93 Difference]: Finished difference Result 79 states and 104 transitions. [2022-07-22 14:34:32,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 14:34:32,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-07-22 14:34:32,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:32,654 INFO L225 Difference]: With dead ends: 79 [2022-07-22 14:34:32,654 INFO L226 Difference]: Without dead ends: 59 [2022-07-22 14:34:32,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 14:34:32,661 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 3 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:32,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 225 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 14:34:32,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-22 14:34:32,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-22 14:34:32,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-22 14:34:32,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2022-07-22 14:34:32,683 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 34 [2022-07-22 14:34:32,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:32,683 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2022-07-22 14:34:32,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 14:34:32,684 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2022-07-22 14:34:32,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-22 14:34:32,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:32,686 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:32,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 14:34:32,686 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:32,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:32,687 INFO L85 PathProgramCache]: Analyzing trace with hash 840977401, now seen corresponding path program 1 times [2022-07-22 14:34:32,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 14:34:32,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234795567] [2022-07-22 14:34:32,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:32,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 14:34:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:32,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 14:34:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:32,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 14:34:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:32,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 14:34:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:32,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 14:34:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 14:34:32,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 14:34:32,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234795567] [2022-07-22 14:34:32,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234795567] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:32,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:32,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 14:34:32,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587970041] [2022-07-22 14:34:32,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:32,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 14:34:32,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 14:34:32,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 14:34:32,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 14:34:32,772 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 14:34:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:32,844 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2022-07-22 14:34:32,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 14:34:32,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-07-22 14:34:32,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:32,846 INFO L225 Difference]: With dead ends: 83 [2022-07-22 14:34:32,846 INFO L226 Difference]: Without dead ends: 63 [2022-07-22 14:34:32,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 14:34:32,847 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 3 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:32,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 241 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 14:34:32,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-22 14:34:32,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-07-22 14:34:32,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-22 14:34:32,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2022-07-22 14:34:32,853 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 35 [2022-07-22 14:34:32,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:32,853 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2022-07-22 14:34:32,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 14:34:32,854 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2022-07-22 14:34:32,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 14:34:32,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:32,855 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:32,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 14:34:32,855 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:32,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:32,855 INFO L85 PathProgramCache]: Analyzing trace with hash -902959273, now seen corresponding path program 1 times [2022-07-22 14:34:32,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 14:34:32,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632101972] [2022-07-22 14:34:32,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:32,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 14:34:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:32,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 14:34:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:32,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 14:34:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:32,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 14:34:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:32,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 14:34:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 14:34:32,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 14:34:32,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632101972] [2022-07-22 14:34:32,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632101972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:32,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:32,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 14:34:32,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145347419] [2022-07-22 14:34:32,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:32,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 14:34:32,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 14:34:32,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 14:34:32,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 14:34:32,915 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 14:34:32,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:32,961 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2022-07-22 14:34:32,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 14:34:32,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-07-22 14:34:32,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:32,962 INFO L225 Difference]: With dead ends: 83 [2022-07-22 14:34:32,963 INFO L226 Difference]: Without dead ends: 63 [2022-07-22 14:34:32,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 14:34:32,964 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 3 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:32,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 241 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 14:34:32,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-22 14:34:32,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-07-22 14:34:32,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-22 14:34:32,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2022-07-22 14:34:32,969 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 36 [2022-07-22 14:34:32,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:32,970 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2022-07-22 14:34:32,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 14:34:32,970 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2022-07-22 14:34:32,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 14:34:32,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:32,971 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:32,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 14:34:32,972 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:32,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:32,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1658214444, now seen corresponding path program 1 times [2022-07-22 14:34:32,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 14:34:32,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515353731] [2022-07-22 14:34:32,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:32,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 14:34:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:33,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 14:34:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:33,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 14:34:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:33,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 14:34:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:33,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 14:34:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 14:34:33,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 14:34:33,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515353731] [2022-07-22 14:34:33,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515353731] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:33,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:33,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 14:34:33,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050917525] [2022-07-22 14:34:33,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:33,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 14:34:33,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 14:34:33,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 14:34:33,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:33,023 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 14:34:33,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:33,064 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2022-07-22 14:34:33,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 14:34:33,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2022-07-22 14:34:33,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:33,065 INFO L225 Difference]: With dead ends: 62 [2022-07-22 14:34:33,065 INFO L226 Difference]: Without dead ends: 60 [2022-07-22 14:34:33,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:33,067 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 3 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:33,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 172 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 14:34:33,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-22 14:34:33,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-22 14:34:33,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.288888888888889) internal successors, (58), 46 states have internal predecessors, (58), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-22 14:34:33,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2022-07-22 14:34:33,072 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 37 [2022-07-22 14:34:33,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:33,072 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2022-07-22 14:34:33,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 14:34:33,072 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2022-07-22 14:34:33,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-22 14:34:33,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:33,073 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:33,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 14:34:33,074 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:33,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:33,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1826594765, now seen corresponding path program 1 times [2022-07-22 14:34:33,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 14:34:33,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114180450] [2022-07-22 14:34:33,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:33,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 14:34:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 14:34:33,108 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 14:34:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 14:34:33,161 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 14:34:33,162 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 14:34:33,162 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-07-22 14:34:33,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 14:34:33,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 14:34:33,166 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-22 14:34:33,168 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 14:34:33,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 02:34:33 BoogieIcfgContainer [2022-07-22 14:34:33,200 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 14:34:33,201 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 14:34:33,201 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 14:34:33,201 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 14:34:33,201 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 02:34:32" (3/4) ... [2022-07-22 14:34:33,203 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-22 14:34:33,203 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 14:34:33,204 INFO L158 Benchmark]: Toolchain (without parser) took 1743.30ms. Allocated memory was 86.0MB in the beginning and 130.0MB in the end (delta: 44.0MB). Free memory was 51.0MB in the beginning and 85.7MB in the end (delta: -34.7MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2022-07-22 14:34:33,204 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 86.0MB. Free memory was 55.8MB in the beginning and 55.8MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 14:34:33,204 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.65ms. Allocated memory was 86.0MB in the beginning and 107.0MB in the end (delta: 21.0MB). Free memory was 50.8MB in the beginning and 81.6MB in the end (delta: -30.8MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2022-07-22 14:34:33,205 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.40ms. Allocated memory is still 107.0MB. Free memory was 81.2MB in the beginning and 79.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 14:34:33,205 INFO L158 Benchmark]: Boogie Preprocessor took 16.60ms. Allocated memory is still 107.0MB. Free memory was 79.5MB in the beginning and 78.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 14:34:33,205 INFO L158 Benchmark]: RCFGBuilder took 329.57ms. Allocated memory is still 107.0MB. Free memory was 78.3MB in the beginning and 65.2MB in the end (delta: 13.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-22 14:34:33,205 INFO L158 Benchmark]: TraceAbstraction took 1186.06ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 64.4MB in the beginning and 85.7MB in the end (delta: -21.3MB). Peak memory consumption was 3.6MB. Max. memory is 16.1GB. [2022-07-22 14:34:33,206 INFO L158 Benchmark]: Witness Printer took 2.55ms. Allocated memory is still 130.0MB. Free memory is still 85.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 14:34:33,211 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 86.0MB. Free memory was 55.8MB in the beginning and 55.8MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 177.65ms. Allocated memory was 86.0MB in the beginning and 107.0MB in the end (delta: 21.0MB). Free memory was 50.8MB in the beginning and 81.6MB in the end (delta: -30.8MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.40ms. Allocated memory is still 107.0MB. Free memory was 81.2MB in the beginning and 79.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.60ms. Allocated memory is still 107.0MB. Free memory was 79.5MB in the beginning and 78.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 329.57ms. Allocated memory is still 107.0MB. Free memory was 78.3MB in the beginning and 65.2MB in the end (delta: 13.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 1186.06ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 64.4MB in the beginning and 85.7MB in the end (delta: -21.3MB). Peak memory consumption was 3.6MB. Max. memory is 16.1GB. * Witness Printer took 2.55ms. Allocated memory is still 130.0MB. Free memory is still 85.7MB. 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: 77]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 76. Possible FailurePath: [L68] float x = __VERIFIER_nondet_float(); [L69] float y = __VERIFIER_nondet_float(); [L70] CALL, EXPR isnan_float(x) VAL [\old(x)=4286578691] [L59] return x != x; VAL [\old(x)=4286578691, \result=1, x=4286578691] [L70] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, x=4286578691] [L70] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, x=4286578691] [L70] CALL, EXPR isnan_float(y) VAL [\old(x)=4286578690] [L59] return x != x; VAL [\old(x)=4286578690, \result=0, x=4286578690] [L70] RET, EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=4286578691, y=4286578690] [L70] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=4286578691, y=4286578690] [L70-L71] (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) VAL [(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))=1, isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=4286578691, y=4286578690] [L70-L71] COND TRUE (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L73] CALL, EXPR fmin_float(x, y) [L38] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=4286578691] [L15] __uint32_t w; VAL [\old(x)=4286578691, x=4286578691] [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) VAL [\old(x)=4286578691, w=4286578689, x=4286578691] [L25-L26] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) VAL [\old(x)=4286578691, w=4286578689, x=4286578691] [L28-L29] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) VAL [\old(x)=4286578691, w=4286578689, x=4286578691] [L31] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L34] return 0; VAL [\old(x)=4286578691, \result=0, w=4286578689, x=4286578691] [L38] RET, EXPR __fpclassify_float(x) VAL [\old(x)=4286578691, \old(y)=4286578690, __fpclassify_float(x)=0, x=4286578691, y=4286578690] [L38] COND TRUE __fpclassify_float(x) == 0 [L39] return y; VAL [\old(x)=4286578691, \old(y)=4286578690, \result=4286578690, x=4286578691, y=4286578690] [L73] RET, EXPR fmin_float(x, y) [L73] float res = fmin_float(x, y); [L76] CALL, EXPR isnan_float(x) VAL [\old(x)=4286578691] [L59] return x != x; VAL [\old(x)=4286578691, \result=1, x=4286578691] [L76] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, res=4286578690, x=4286578691, y=4286578690] [L76] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, res=4286578690, x=4286578691, y=4286578690] [L76] CALL, EXPR isnan_float(y) VAL [\old(x)=4286578690] [L59] return x != x; VAL [\old(x)=4286578690, \result=0, x=4286578690] [L76] RET, EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=4286578690, x=4286578691, y=4286578690] [L76] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=4286578690, x=4286578691, y=4286578690] [L76] COND TRUE isnan_float(x) && !isnan_float(y) && res != y [L77] reach_error() VAL [res=4286578690, x=4286578691, y=4286578690] - UnprovableResult [Line: 83]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 57 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 33 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31 mSDsluCounter, 1124 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 759 mSDsCounter, 53 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 233 IncrementalHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 53 mSolverCounterUnsat, 365 mSDtfsCounter, 233 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=5, InterpolantAutomatonStates: 25, 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, 5 MinimizatonAttempts, 15 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 212 NumberOfCodeBlocks, 212 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 165 ConstructedInterpolants, 0 QuantifiedInterpolants, 276 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 39/39 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 [2022-07-22 14:34:33,239 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 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/float_req_bl_1231.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 7acfe881669b731d03fc8aee9db955b71d947923db9c9de4e28fcb386b44b191 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 14:34:34,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 14:34:34,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 14:34:34,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 14:34:34,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 14:34:34,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 14:34:34,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 14:34:34,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 14:34:34,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 14:34:34,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 14:34:34,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 14:34:34,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 14:34:34,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 14:34:34,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 14:34:34,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 14:34:34,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 14:34:34,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 14:34:34,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 14:34:34,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 14:34:34,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 14:34:34,920 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 14:34:34,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 14:34:34,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 14:34:34,923 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 14:34:34,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 14:34:34,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 14:34:34,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 14:34:34,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 14:34:34,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 14:34:34,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 14:34:34,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 14:34:34,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 14:34:34,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 14:34:34,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 14:34:34,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 14:34:34,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 14:34:34,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 14:34:34,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 14:34:34,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 14:34:34,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 14:34:34,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 14:34:34,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 14:34:34,935 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-22 14:34:34,961 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 14:34:34,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 14:34:34,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 14:34:34,962 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 14:34:34,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 14:34:34,963 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 14:34:34,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 14:34:34,964 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 14:34:34,964 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 14:34:34,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 14:34:34,965 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 14:34:34,965 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 14:34:34,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 14:34:34,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 14:34:34,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 14:34:34,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 14:34:34,966 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-22 14:34:34,966 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-22 14:34:34,966 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-22 14:34:34,966 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 14:34:34,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 14:34:34,966 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 14:34:34,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 14:34:34,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 14:34:34,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 14:34:34,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 14:34:34,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 14:34:34,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 14:34:34,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 14:34:34,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 14:34:34,968 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-22 14:34:34,968 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-22 14:34:34,968 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 14:34:34,968 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 14:34:34,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 14:34:34,969 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-22 14:34:34,969 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7acfe881669b731d03fc8aee9db955b71d947923db9c9de4e28fcb386b44b191 [2022-07-22 14:34:35,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 14:34:35,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 14:34:35,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 14:34:35,217 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 14:34:35,217 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 14:34:35,218 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1231.c [2022-07-22 14:34:35,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/304893c8b/cea441734eca4483a64fda2ab1ac56fd/FLAGa3b04ab18 [2022-07-22 14:34:35,630 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 14:34:35,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1231.c [2022-07-22 14:34:35,642 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/304893c8b/cea441734eca4483a64fda2ab1ac56fd/FLAGa3b04ab18 [2022-07-22 14:34:35,655 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/304893c8b/cea441734eca4483a64fda2ab1ac56fd [2022-07-22 14:34:35,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 14:34:35,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 14:34:35,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 14:34:35,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 14:34:35,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 14:34:35,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 02:34:35" (1/1) ... [2022-07-22 14:34:35,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@771e9e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:35, skipping insertion in model container [2022-07-22 14:34:35,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 02:34:35" (1/1) ... [2022-07-22 14:34:35,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 14:34:35,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 14:34:35,825 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/float_req_bl_1231.c[1835,1848] [2022-07-22 14:34:35,831 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/float_req_bl_1231.c[1994,2007] [2022-07-22 14:34:35,832 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 14:34:35,848 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 14:34:35,873 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/float_req_bl_1231.c[1835,1848] [2022-07-22 14:34:35,874 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/float_req_bl_1231.c[1994,2007] [2022-07-22 14:34:35,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 14:34:35,884 INFO L208 MainTranslator]: Completed translation [2022-07-22 14:34:35,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:35 WrapperNode [2022-07-22 14:34:35,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 14:34:35,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 14:34:35,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 14:34:35,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 14:34:35,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:35" (1/1) ... [2022-07-22 14:34:35,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:35" (1/1) ... [2022-07-22 14:34:35,908 INFO L137 Inliner]: procedures = 22, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2022-07-22 14:34:35,908 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 14:34:35,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 14:34:35,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 14:34:35,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 14:34:35,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:35" (1/1) ... [2022-07-22 14:34:35,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:35" (1/1) ... [2022-07-22 14:34:35,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:35" (1/1) ... [2022-07-22 14:34:35,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:35" (1/1) ... [2022-07-22 14:34:35,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:35" (1/1) ... [2022-07-22 14:34:35,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:35" (1/1) ... [2022-07-22 14:34:35,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:35" (1/1) ... [2022-07-22 14:34:35,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 14:34:35,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 14:34:35,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 14:34:35,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 14:34:35,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:35" (1/1) ... [2022-07-22 14:34:35,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 14:34:35,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 14:34:35,951 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) [2022-07-22 14:34:35,967 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 [2022-07-22 14:34:35,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 14:34:35,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-22 14:34:35,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 14:34:35,978 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2022-07-22 14:34:35,978 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2022-07-22 14:34:35,978 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2022-07-22 14:34:35,978 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2022-07-22 14:34:35,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-22 14:34:35,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 14:34:35,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 14:34:35,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2022-07-22 14:34:35,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 14:34:36,027 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 14:34:36,028 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 14:34:36,231 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 14:34:36,235 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 14:34:36,235 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 14:34:36,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 02:34:36 BoogieIcfgContainer [2022-07-22 14:34:36,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 14:34:36,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 14:34:36,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 14:34:36,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 14:34:36,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 02:34:35" (1/3) ... [2022-07-22 14:34:36,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e66af68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 02:34:36, skipping insertion in model container [2022-07-22 14:34:36,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:34:35" (2/3) ... [2022-07-22 14:34:36,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e66af68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 02:34:36, skipping insertion in model container [2022-07-22 14:34:36,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 02:34:36" (3/3) ... [2022-07-22 14:34:36,242 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1231.c [2022-07-22 14:34:36,252 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 14:34:36,252 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 14:34:36,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 14:34:36,318 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@2c03d0f5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@20f32f26 [2022-07-22 14:34:36,318 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 14:34:36,321 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 40 states have (on average 1.475) internal successors, (59), 42 states have internal predecessors, (59), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-22 14:34:36,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 14:34:36,327 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:36,328 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:36,328 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:36,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:36,333 INFO L85 PathProgramCache]: Analyzing trace with hash 956195031, now seen corresponding path program 1 times [2022-07-22 14:34:36,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:36,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934063229] [2022-07-22 14:34:36,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:36,343 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:36,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:36,345 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) [2022-07-22 14:34:36,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-22 14:34:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:36,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-22 14:34:36,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:36,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 14:34:36,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:34:36,447 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:36,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934063229] [2022-07-22 14:34:36,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934063229] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:36,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:36,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 14:34:36,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636628926] [2022-07-22 14:34:36,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:36,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 14:34:36,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:36,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 14:34:36,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 14:34:36,477 INFO L87 Difference]: Start difference. First operand has 55 states, 40 states have (on average 1.475) internal successors, (59), 42 states have internal predecessors, (59), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 14:34:36,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:36,499 INFO L93 Difference]: Finished difference Result 93 states and 134 transitions. [2022-07-22 14:34:36,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 14:34:36,501 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-07-22 14:34:36,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:36,506 INFO L225 Difference]: With dead ends: 93 [2022-07-22 14:34:36,506 INFO L226 Difference]: Without dead ends: 51 [2022-07-22 14:34:36,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 14:34:36,514 INFO L413 NwaCegarLoop]: 75 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, 75 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 [2022-07-22 14:34:36,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 14:34:36,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-22 14:34:36,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-22 14:34:36,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 38 states have internal predecessors, (50), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-22 14:34:36,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2022-07-22 14:34:36,555 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 27 [2022-07-22 14:34:36,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:36,557 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2022-07-22 14:34:36,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 14:34:36,557 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2022-07-22 14:34:36,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 14:34:36,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:36,559 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:36,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-22 14:34:36,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:36,766 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:36,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:36,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1128254016, now seen corresponding path program 1 times [2022-07-22 14:34:36,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:36,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679255060] [2022-07-22 14:34:36,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:36,768 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:36,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:36,769 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) [2022-07-22 14:34:36,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-22 14:34:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:36,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 14:34:36,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 14:34:36,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:34:36,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:36,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679255060] [2022-07-22 14:34:36,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679255060] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:36,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:36,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 14:34:36,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137315962] [2022-07-22 14:34:36,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:36,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 14:34:36,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:36,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 14:34:36,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:36,871 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 14:34:36,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:36,913 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions. [2022-07-22 14:34:36,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 14:34:36,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-07-22 14:34:36,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:36,914 INFO L225 Difference]: With dead ends: 96 [2022-07-22 14:34:36,914 INFO L226 Difference]: Without dead ends: 60 [2022-07-22 14:34:36,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 14:34:36,916 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 16 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:36,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 192 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 14:34:36,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-22 14:34:36,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2022-07-22 14:34:36,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 40 states have internal predecessors, (52), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-22 14:34:36,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2022-07-22 14:34:36,922 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 28 [2022-07-22 14:34:36,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:36,922 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2022-07-22 14:34:36,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 14:34:36,923 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2022-07-22 14:34:36,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 14:34:36,923 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:36,923 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:36,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:37,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:37,124 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:37,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:37,125 INFO L85 PathProgramCache]: Analyzing trace with hash 987158491, now seen corresponding path program 1 times [2022-07-22 14:34:37,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:37,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525940838] [2022-07-22 14:34:37,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:37,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:37,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:37,127 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) [2022-07-22 14:34:37,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-22 14:34:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:37,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 14:34:37,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 14:34:37,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:34:37,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:37,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525940838] [2022-07-22 14:34:37,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525940838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:37,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:37,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 14:34:37,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428108268] [2022-07-22 14:34:37,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:37,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 14:34:37,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:37,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 14:34:37,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:37,212 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 14:34:37,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:37,233 INFO L93 Difference]: Finished difference Result 76 states and 101 transitions. [2022-07-22 14:34:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 14:34:37,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-07-22 14:34:37,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:37,235 INFO L225 Difference]: With dead ends: 76 [2022-07-22 14:34:37,235 INFO L226 Difference]: Without dead ends: 56 [2022-07-22 14:34:37,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:37,236 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 198 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 [2022-07-22 14:34:37,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 198 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 14:34:37,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-22 14:34:37,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-07-22 14:34:37,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-22 14:34:37,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2022-07-22 14:34:37,252 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 33 [2022-07-22 14:34:37,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:37,252 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2022-07-22 14:34:37,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 14:34:37,252 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2022-07-22 14:34:37,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-22 14:34:37,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:37,262 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:37,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:37,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:37,465 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:37,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:37,465 INFO L85 PathProgramCache]: Analyzing trace with hash 871427583, now seen corresponding path program 1 times [2022-07-22 14:34:37,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:37,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112393724] [2022-07-22 14:34:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:37,466 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:37,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:37,472 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) [2022-07-22 14:34:37,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-22 14:34:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:37,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 14:34:37,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 14:34:37,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:34:37,560 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:37,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112393724] [2022-07-22 14:34:37,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112393724] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:37,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:37,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 14:34:37,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349921755] [2022-07-22 14:34:37,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:37,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 14:34:37,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:37,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 14:34:37,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:37,561 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 14:34:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:37,581 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2022-07-22 14:34:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 14:34:37,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-07-22 14:34:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:37,582 INFO L225 Difference]: With dead ends: 79 [2022-07-22 14:34:37,582 INFO L226 Difference]: Without dead ends: 59 [2022-07-22 14:34:37,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:37,583 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:37,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 207 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 14:34:37,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-22 14:34:37,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-07-22 14:34:37,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-22 14:34:37,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2022-07-22 14:34:37,589 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 34 [2022-07-22 14:34:37,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:37,590 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2022-07-22 14:34:37,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 14:34:37,590 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2022-07-22 14:34:37,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-22 14:34:37,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:37,591 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:37,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:37,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:37,798 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:37,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:37,799 INFO L85 PathProgramCache]: Analyzing trace with hash 405124703, now seen corresponding path program 1 times [2022-07-22 14:34:37,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:37,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153291072] [2022-07-22 14:34:37,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:37,800 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:37,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:37,801 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) [2022-07-22 14:34:37,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-22 14:34:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:37,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 14:34:37,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 14:34:37,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:34:37,879 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:37,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153291072] [2022-07-22 14:34:37,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153291072] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:37,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:37,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 14:34:37,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871912449] [2022-07-22 14:34:37,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:37,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 14:34:37,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:37,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 14:34:37,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:37,880 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 14:34:37,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:37,912 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2022-07-22 14:34:37,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 14:34:37,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-07-22 14:34:37,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:37,914 INFO L225 Difference]: With dead ends: 79 [2022-07-22 14:34:37,914 INFO L226 Difference]: Without dead ends: 59 [2022-07-22 14:34:37,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:37,915 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:37,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 207 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 14:34:37,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-22 14:34:37,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-07-22 14:34:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-22 14:34:37,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2022-07-22 14:34:37,920 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 35 [2022-07-22 14:34:37,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:37,921 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2022-07-22 14:34:37,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 14:34:37,921 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2022-07-22 14:34:37,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 14:34:37,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:37,922 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:37,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:38,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:38,128 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:38,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:38,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1955992579, now seen corresponding path program 1 times [2022-07-22 14:34:38,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:38,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [948060051] [2022-07-22 14:34:38,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:38,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:38,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:38,130 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) [2022-07-22 14:34:38,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-22 14:34:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:38,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 14:34:38,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 14:34:38,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:34:38,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:38,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [948060051] [2022-07-22 14:34:38,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [948060051] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:38,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:38,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 14:34:38,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861189862] [2022-07-22 14:34:38,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:38,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 14:34:38,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:38,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 14:34:38,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:38,192 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 14:34:38,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:38,209 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2022-07-22 14:34:38,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 14:34:38,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-07-22 14:34:38,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:38,210 INFO L225 Difference]: With dead ends: 79 [2022-07-22 14:34:38,210 INFO L226 Difference]: Without dead ends: 59 [2022-07-22 14:34:38,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:38,211 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:38,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 207 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 14:34:38,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-22 14:34:38,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-07-22 14:34:38,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-22 14:34:38,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2022-07-22 14:34:38,221 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 36 [2022-07-22 14:34:38,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:38,221 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2022-07-22 14:34:38,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 14:34:38,221 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2022-07-22 14:34:38,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 14:34:38,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:38,222 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:38,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-22 14:34:38,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:38,432 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:38,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:38,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1662589572, now seen corresponding path program 1 times [2022-07-22 14:34:38,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:38,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045949336] [2022-07-22 14:34:38,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:38,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:38,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:38,434 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) [2022-07-22 14:34:38,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-22 14:34:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:38,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 14:34:38,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 14:34:38,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 14:34:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 14:34:38,903 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:38,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045949336] [2022-07-22 14:34:38,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045949336] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 14:34:38,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 14:34:38,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2022-07-22 14:34:38,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668751645] [2022-07-22 14:34:38,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 14:34:38,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 14:34:38,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:38,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 14:34:38,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-22 14:34:38,905 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 14:34:40,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:40,224 INFO L93 Difference]: Finished difference Result 102 states and 138 transitions. [2022-07-22 14:34:40,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 14:34:40,225 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) Word has length 36 [2022-07-22 14:34:40,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:40,225 INFO L225 Difference]: With dead ends: 102 [2022-07-22 14:34:40,225 INFO L226 Difference]: Without dead ends: 88 [2022-07-22 14:34:40,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-07-22 14:34:40,226 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 103 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:40,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 639 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 14:34:40,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-22 14:34:40,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2022-07-22 14:34:40,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 54 states have internal predecessors, (71), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (19), 17 states have call predecessors, (19), 15 states have call successors, (19) [2022-07-22 14:34:40,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 105 transitions. [2022-07-22 14:34:40,233 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 105 transitions. Word has length 36 [2022-07-22 14:34:40,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:40,233 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 105 transitions. [2022-07-22 14:34:40,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 14:34:40,233 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 105 transitions. [2022-07-22 14:34:40,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-22 14:34:40,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:40,234 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:40,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:40,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:40,442 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:40,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:40,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2045835875, now seen corresponding path program 1 times [2022-07-22 14:34:40,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:40,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502625158] [2022-07-22 14:34:40,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:40,443 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:40,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:40,444 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) [2022-07-22 14:34:40,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-22 14:34:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:40,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 14:34:40,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 14:34:40,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:34:40,594 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:40,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502625158] [2022-07-22 14:34:40,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502625158] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:40,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:40,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 14:34:40,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824281810] [2022-07-22 14:34:40,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:40,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 14:34:40,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:40,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 14:34:40,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 14:34:40,595 INFO L87 Difference]: Start difference. First operand 74 states and 105 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 14:34:40,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:40,942 INFO L93 Difference]: Finished difference Result 127 states and 174 transitions. [2022-07-22 14:34:40,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 14:34:40,942 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-07-22 14:34:40,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:40,943 INFO L225 Difference]: With dead ends: 127 [2022-07-22 14:34:40,943 INFO L226 Difference]: Without dead ends: 87 [2022-07-22 14:34:40,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-07-22 14:34:40,944 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 56 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:40,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 498 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 14:34:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-22 14:34:40,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2022-07-22 14:34:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 54 states have internal predecessors, (70), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (19), 17 states have call predecessors, (19), 15 states have call successors, (19) [2022-07-22 14:34:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2022-07-22 14:34:40,950 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 38 [2022-07-22 14:34:40,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:40,950 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2022-07-22 14:34:40,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 14:34:40,950 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2022-07-22 14:34:40,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 14:34:40,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:40,951 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:40,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:41,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:41,152 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:41,152 INFO L85 PathProgramCache]: Analyzing trace with hash -490349503, now seen corresponding path program 1 times [2022-07-22 14:34:41,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:41,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139737904] [2022-07-22 14:34:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:41,153 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:41,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:41,154 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) [2022-07-22 14:34:41,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-22 14:34:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:41,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 14:34:41,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 14:34:41,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 14:34:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 14:34:41,681 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:41,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139737904] [2022-07-22 14:34:41,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139737904] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 14:34:41,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 14:34:41,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-07-22 14:34:41,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655878501] [2022-07-22 14:34:41,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 14:34:41,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 14:34:41,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:41,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 14:34:41,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-07-22 14:34:41,682 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-22 14:34:42,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:42,128 INFO L93 Difference]: Finished difference Result 117 states and 162 transitions. [2022-07-22 14:34:42,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 14:34:42,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 41 [2022-07-22 14:34:42,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:42,129 INFO L225 Difference]: With dead ends: 117 [2022-07-22 14:34:42,129 INFO L226 Difference]: Without dead ends: 115 [2022-07-22 14:34:42,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-07-22 14:34:42,130 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 149 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:42,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 463 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 14:34:42,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-22 14:34:42,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 84. [2022-07-22 14:34:42,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (23), 20 states have call predecessors, (23), 18 states have call successors, (23) [2022-07-22 14:34:42,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 119 transitions. [2022-07-22 14:34:42,137 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 119 transitions. Word has length 41 [2022-07-22 14:34:42,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:42,138 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 119 transitions. [2022-07-22 14:34:42,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-22 14:34:42,138 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 119 transitions. [2022-07-22 14:34:42,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-22 14:34:42,139 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:42,139 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:42,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:42,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:42,345 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:42,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:42,345 INFO L85 PathProgramCache]: Analyzing trace with hash 38675638, now seen corresponding path program 1 times [2022-07-22 14:34:42,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:42,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493936632] [2022-07-22 14:34:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:42,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:42,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:42,347 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) [2022-07-22 14:34:42,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-22 14:34:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:42,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 14:34:42,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 14:34:42,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:34:42,397 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:42,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493936632] [2022-07-22 14:34:42,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493936632] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:42,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:42,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 14:34:42,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349247962] [2022-07-22 14:34:42,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:42,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 14:34:42,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:42,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 14:34:42,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 14:34:42,398 INFO L87 Difference]: Start difference. First operand 84 states and 119 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 14:34:42,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:42,406 INFO L93 Difference]: Finished difference Result 87 states and 122 transitions. [2022-07-22 14:34:42,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 14:34:42,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2022-07-22 14:34:42,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:42,407 INFO L225 Difference]: With dead ends: 87 [2022-07-22 14:34:42,407 INFO L226 Difference]: Without dead ends: 85 [2022-07-22 14:34:42,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 14:34:42,408 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:42,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 133 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 14:34:42,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-22 14:34:42,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-07-22 14:34:42,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (23), 20 states have call predecessors, (23), 18 states have call successors, (23) [2022-07-22 14:34:42,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 119 transitions. [2022-07-22 14:34:42,413 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 119 transitions. Word has length 43 [2022-07-22 14:34:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:42,413 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 119 transitions. [2022-07-22 14:34:42,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 14:34:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 119 transitions. [2022-07-22 14:34:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-22 14:34:42,414 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:42,414 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:42,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:42,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:42,622 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:42,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:42,622 INFO L85 PathProgramCache]: Analyzing trace with hash 972082008, now seen corresponding path program 1 times [2022-07-22 14:34:42,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:42,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460893575] [2022-07-22 14:34:42,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:42,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:42,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:42,624 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) [2022-07-22 14:34:42,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-22 14:34:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:42,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 14:34:42,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 14:34:42,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:34:42,689 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:42,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460893575] [2022-07-22 14:34:42,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460893575] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:42,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:42,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 14:34:42,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953313887] [2022-07-22 14:34:42,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:42,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 14:34:42,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:42,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 14:34:42,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:42,690 INFO L87 Difference]: Start difference. First operand 84 states and 119 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 14:34:42,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:42,702 INFO L93 Difference]: Finished difference Result 113 states and 159 transitions. [2022-07-22 14:34:42,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 14:34:42,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2022-07-22 14:34:42,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:42,703 INFO L225 Difference]: With dead ends: 113 [2022-07-22 14:34:42,703 INFO L226 Difference]: Without dead ends: 88 [2022-07-22 14:34:42,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:42,704 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 198 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 [2022-07-22 14:34:42,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 198 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 14:34:42,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-22 14:34:42,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-07-22 14:34:42,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.265625) internal successors, (81), 63 states have internal predecessors, (81), 18 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (28), 22 states have call predecessors, (28), 18 states have call successors, (28) [2022-07-22 14:34:42,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 127 transitions. [2022-07-22 14:34:42,710 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 127 transitions. Word has length 46 [2022-07-22 14:34:42,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:42,710 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 127 transitions. [2022-07-22 14:34:42,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 14:34:42,710 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 127 transitions. [2022-07-22 14:34:42,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 14:34:42,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:42,711 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:42,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:42,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:42,919 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:42,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:42,920 INFO L85 PathProgramCache]: Analyzing trace with hash 411048800, now seen corresponding path program 1 times [2022-07-22 14:34:42,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:42,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139930687] [2022-07-22 14:34:42,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:42,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:42,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:42,921 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) [2022-07-22 14:34:42,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-22 14:34:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:42,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 14:34:42,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 14:34:42,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:34:42,980 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:42,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139930687] [2022-07-22 14:34:42,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139930687] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:42,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:42,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 14:34:42,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858599606] [2022-07-22 14:34:42,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:42,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 14:34:42,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:42,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 14:34:42,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:42,981 INFO L87 Difference]: Start difference. First operand 88 states and 127 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 14:34:43,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:43,003 INFO L93 Difference]: Finished difference Result 117 states and 167 transitions. [2022-07-22 14:34:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 14:34:43,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2022-07-22 14:34:43,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:43,005 INFO L225 Difference]: With dead ends: 117 [2022-07-22 14:34:43,005 INFO L226 Difference]: Without dead ends: 92 [2022-07-22 14:34:43,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:43,007 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:43,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 207 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 14:34:43,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-22 14:34:43,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-07-22 14:34:43,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.265625) internal successors, (81), 63 states have internal predecessors, (81), 18 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (28), 22 states have call predecessors, (28), 18 states have call successors, (28) [2022-07-22 14:34:43,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 127 transitions. [2022-07-22 14:34:43,020 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 127 transitions. Word has length 47 [2022-07-22 14:34:43,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:43,020 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 127 transitions. [2022-07-22 14:34:43,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 14:34:43,020 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 127 transitions. [2022-07-22 14:34:43,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 14:34:43,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:43,021 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:43,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:43,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:43,239 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:43,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:43,240 INFO L85 PathProgramCache]: Analyzing trace with hash -877982242, now seen corresponding path program 1 times [2022-07-22 14:34:43,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:43,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1143621618] [2022-07-22 14:34:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:43,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:43,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:43,241 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 14:34:43,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-22 14:34:43,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:43,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 14:34:43,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 14:34:43,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 14:34:43,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:43,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1143621618] [2022-07-22 14:34:43,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1143621618] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 14:34:43,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1052175532] [2022-07-22 14:34:43,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:43,476 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-22 14:34:43,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-22 14:34:43,478 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-22 14:34:43,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-07-22 14:34:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:43,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 14:34:43,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 14:34:43,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 14:34:43,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1052175532] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 14:34:43,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 14:34:43,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-07-22 14:34:43,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042253646] [2022-07-22 14:34:43,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 14:34:43,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 14:34:43,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:43,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 14:34:43,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-22 14:34:43,721 INFO L87 Difference]: Start difference. First operand 88 states and 127 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-22 14:34:43,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:43,952 INFO L93 Difference]: Finished difference Result 123 states and 168 transitions. [2022-07-22 14:34:43,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 14:34:43,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 48 [2022-07-22 14:34:43,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:43,953 INFO L225 Difference]: With dead ends: 123 [2022-07-22 14:34:43,953 INFO L226 Difference]: Without dead ends: 102 [2022-07-22 14:34:43,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-22 14:34:43,954 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 68 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:43,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 309 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 14:34:43,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-22 14:34:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 88. [2022-07-22 14:34:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.25) internal successors, (80), 63 states have internal predecessors, (80), 18 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (28), 22 states have call predecessors, (28), 18 states have call successors, (28) [2022-07-22 14:34:43,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 126 transitions. [2022-07-22 14:34:43,966 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 126 transitions. Word has length 48 [2022-07-22 14:34:43,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:43,966 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 126 transitions. [2022-07-22 14:34:43,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-22 14:34:43,966 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 126 transitions. [2022-07-22 14:34:43,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 14:34:43,967 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:43,967 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:43,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-07-22 14:34:44,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-07-22 14:34:44,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:44,370 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:44,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:44,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1899050596, now seen corresponding path program 1 times [2022-07-22 14:34:44,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:44,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079164505] [2022-07-22 14:34:44,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:44,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:44,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:44,372 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 14:34:44,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-22 14:34:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:44,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 14:34:44,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:44,691 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 14:34:44,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:34:44,691 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:44,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079164505] [2022-07-22 14:34:44,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079164505] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:44,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:44,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 14:34:44,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003709788] [2022-07-22 14:34:44,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:44,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 14:34:44,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:44,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 14:34:44,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-22 14:34:44,692 INFO L87 Difference]: Start difference. First operand 88 states and 126 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 14:34:45,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:45,471 INFO L93 Difference]: Finished difference Result 137 states and 191 transitions. [2022-07-22 14:34:45,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 14:34:45,472 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2022-07-22 14:34:45,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:45,472 INFO L225 Difference]: With dead ends: 137 [2022-07-22 14:34:45,472 INFO L226 Difference]: Without dead ends: 135 [2022-07-22 14:34:45,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-22 14:34:45,473 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 91 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:45,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 513 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 14:34:45,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-22 14:34:45,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 100. [2022-07-22 14:34:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 72 states have internal predecessors, (92), 19 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (34), 25 states have call predecessors, (34), 19 states have call successors, (34) [2022-07-22 14:34:45,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 145 transitions. [2022-07-22 14:34:45,478 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 145 transitions. Word has length 48 [2022-07-22 14:34:45,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:45,478 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 145 transitions. [2022-07-22 14:34:45,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 14:34:45,478 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 145 transitions. [2022-07-22 14:34:45,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 14:34:45,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:45,479 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:45,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-22 14:34:45,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:45,687 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:45,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:45,687 INFO L85 PathProgramCache]: Analyzing trace with hash 505566420, now seen corresponding path program 1 times [2022-07-22 14:34:45,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:45,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421265684] [2022-07-22 14:34:45,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:45,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:45,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:45,689 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 14:34:45,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-22 14:34:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:45,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 14:34:45,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 14:34:45,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:34:45,750 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:45,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421265684] [2022-07-22 14:34:45,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421265684] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:45,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:45,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 14:34:45,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418605002] [2022-07-22 14:34:45,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:45,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 14:34:45,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:45,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 14:34:45,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:45,751 INFO L87 Difference]: Start difference. First operand 100 states and 145 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 14:34:45,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:45,780 INFO L93 Difference]: Finished difference Result 129 states and 185 transitions. [2022-07-22 14:34:45,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 14:34:45,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2022-07-22 14:34:45,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:45,781 INFO L225 Difference]: With dead ends: 129 [2022-07-22 14:34:45,781 INFO L226 Difference]: Without dead ends: 104 [2022-07-22 14:34:45,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:45,783 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:45,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 207 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 14:34:45,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-22 14:34:45,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2022-07-22 14:34:45,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 72 states have internal predecessors, (92), 19 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (34), 25 states have call predecessors, (34), 19 states have call successors, (34) [2022-07-22 14:34:45,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 145 transitions. [2022-07-22 14:34:45,793 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 145 transitions. Word has length 48 [2022-07-22 14:34:45,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:45,793 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 145 transitions. [2022-07-22 14:34:45,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 14:34:45,793 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 145 transitions. [2022-07-22 14:34:45,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 14:34:45,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:45,795 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:45,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:46,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:46,003 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:46,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:46,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1437385679, now seen corresponding path program 1 times [2022-07-22 14:34:46,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:46,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365279299] [2022-07-22 14:34:46,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:46,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:46,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:46,004 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 14:34:46,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-22 14:34:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:46,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 14:34:46,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 14:34:46,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 14:34:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 14:34:46,365 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:46,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365279299] [2022-07-22 14:34:46,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365279299] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 14:34:46,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 14:34:46,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2022-07-22 14:34:46,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472604295] [2022-07-22 14:34:46,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 14:34:46,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 14:34:46,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:46,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 14:34:46,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-22 14:34:46,366 INFO L87 Difference]: Start difference. First operand 100 states and 145 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 14:34:46,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:46,613 INFO L93 Difference]: Finished difference Result 122 states and 170 transitions. [2022-07-22 14:34:46,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 14:34:46,614 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2022-07-22 14:34:46,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:46,614 INFO L225 Difference]: With dead ends: 122 [2022-07-22 14:34:46,614 INFO L226 Difference]: Without dead ends: 99 [2022-07-22 14:34:46,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-07-22 14:34:46,615 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 86 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:46,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 443 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 14:34:46,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-22 14:34:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2022-07-22 14:34:46,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 69 states have internal predecessors, (85), 19 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (33), 23 states have call predecessors, (33), 19 states have call successors, (33) [2022-07-22 14:34:46,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 137 transitions. [2022-07-22 14:34:46,620 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 137 transitions. Word has length 48 [2022-07-22 14:34:46,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:46,620 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 137 transitions. [2022-07-22 14:34:46,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 14:34:46,620 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 137 transitions. [2022-07-22 14:34:46,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 14:34:46,621 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:46,621 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:46,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:46,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:46,828 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:46,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1803392071, now seen corresponding path program 1 times [2022-07-22 14:34:46,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:46,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040186324] [2022-07-22 14:34:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:46,829 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:46,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:46,830 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 14:34:46,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-22 14:34:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:46,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 14:34:46,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 14:34:46,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 14:34:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 14:34:47,136 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:47,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040186324] [2022-07-22 14:34:47,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040186324] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 14:34:47,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 14:34:47,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-07-22 14:34:47,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480780182] [2022-07-22 14:34:47,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 14:34:47,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 14:34:47,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:47,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 14:34:47,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-22 14:34:47,137 INFO L87 Difference]: Start difference. First operand 95 states and 137 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-22 14:34:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:47,573 INFO L93 Difference]: Finished difference Result 133 states and 178 transitions. [2022-07-22 14:34:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 14:34:47,573 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) Word has length 48 [2022-07-22 14:34:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:47,574 INFO L225 Difference]: With dead ends: 133 [2022-07-22 14:34:47,574 INFO L226 Difference]: Without dead ends: 89 [2022-07-22 14:34:47,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-07-22 14:34:47,575 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 48 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:47,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 530 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 14:34:47,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-22 14:34:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2022-07-22 14:34:47,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 63 states have internal predecessors, (76), 16 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (27), 20 states have call predecessors, (27), 16 states have call successors, (27) [2022-07-22 14:34:47,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 119 transitions. [2022-07-22 14:34:47,579 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 119 transitions. Word has length 48 [2022-07-22 14:34:47,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:47,579 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 119 transitions. [2022-07-22 14:34:47,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-22 14:34:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 119 transitions. [2022-07-22 14:34:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 14:34:47,583 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:47,583 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:47,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-07-22 14:34:47,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:47,790 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:47,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:47,790 INFO L85 PathProgramCache]: Analyzing trace with hash -495361713, now seen corresponding path program 1 times [2022-07-22 14:34:47,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:47,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987870210] [2022-07-22 14:34:47,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:47,791 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:47,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:47,792 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 14:34:47,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-22 14:34:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:47,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 14:34:47,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 14:34:47,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 14:34:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 14:34:48,110 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:48,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987870210] [2022-07-22 14:34:48,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987870210] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 14:34:48,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 14:34:48,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2022-07-22 14:34:48,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321558619] [2022-07-22 14:34:48,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 14:34:48,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 14:34:48,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:48,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 14:34:48,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-07-22 14:34:48,111 INFO L87 Difference]: Start difference. First operand 86 states and 119 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-22 14:34:48,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:48,314 INFO L93 Difference]: Finished difference Result 101 states and 133 transitions. [2022-07-22 14:34:48,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 14:34:48,315 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 48 [2022-07-22 14:34:48,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:48,315 INFO L225 Difference]: With dead ends: 101 [2022-07-22 14:34:48,315 INFO L226 Difference]: Without dead ends: 82 [2022-07-22 14:34:48,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-07-22 14:34:48,316 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 48 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:48,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 503 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 14:34:48,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-22 14:34:48,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2022-07-22 14:34:48,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 55 states have internal predecessors, (63), 13 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (24), 16 states have call predecessors, (24), 13 states have call successors, (24) [2022-07-22 14:34:48,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2022-07-22 14:34:48,319 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 48 [2022-07-22 14:34:48,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:48,319 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2022-07-22 14:34:48,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-22 14:34:48,320 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2022-07-22 14:34:48,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 14:34:48,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:48,320 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:48,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:48,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:48,520 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:48,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:48,521 INFO L85 PathProgramCache]: Analyzing trace with hash 113915812, now seen corresponding path program 1 times [2022-07-22 14:34:48,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:48,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444434337] [2022-07-22 14:34:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:48,521 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:48,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:48,522 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 14:34:48,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-22 14:34:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:48,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 14:34:48,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 14:34:48,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 14:34:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 14:34:49,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:49,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444434337] [2022-07-22 14:34:49,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444434337] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 14:34:49,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 14:34:49,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-07-22 14:34:49,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310849371] [2022-07-22 14:34:49,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 14:34:49,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 14:34:49,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:49,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 14:34:49,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-07-22 14:34:49,113 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-22 14:34:50,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:50,010 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2022-07-22 14:34:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 14:34:50,011 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 49 [2022-07-22 14:34:50,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:50,011 INFO L225 Difference]: With dead ends: 84 [2022-07-22 14:34:50,011 INFO L226 Difference]: Without dead ends: 72 [2022-07-22 14:34:50,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2022-07-22 14:34:50,012 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 81 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:50,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 309 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 14:34:50,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-22 14:34:50,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-07-22 14:34:50,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.16) internal successors, (58), 51 states have internal predecessors, (58), 13 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (20), 15 states have call predecessors, (20), 13 states have call successors, (20) [2022-07-22 14:34:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2022-07-22 14:34:50,017 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 49 [2022-07-22 14:34:50,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:50,017 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2022-07-22 14:34:50,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-22 14:34:50,017 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2022-07-22 14:34:50,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 14:34:50,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:50,017 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:50,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:50,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:50,225 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:50,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:50,225 INFO L85 PathProgramCache]: Analyzing trace with hash -552676772, now seen corresponding path program 1 times [2022-07-22 14:34:50,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:50,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090394633] [2022-07-22 14:34:50,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:50,226 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:50,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:50,227 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 14:34:50,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-22 14:34:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:50,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 14:34:50,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:50,292 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 14:34:50,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:34:50,292 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:50,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090394633] [2022-07-22 14:34:50,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1090394633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:50,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:50,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 14:34:50,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670280515] [2022-07-22 14:34:50,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:50,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 14:34:50,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:50,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 14:34:50,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:50,293 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 14:34:50,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:50,314 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2022-07-22 14:34:50,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 14:34:50,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 49 [2022-07-22 14:34:50,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:50,314 INFO L225 Difference]: With dead ends: 96 [2022-07-22 14:34:50,314 INFO L226 Difference]: Without dead ends: 70 [2022-07-22 14:34:50,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:50,315 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:50,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 199 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 14:34:50,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-22 14:34:50,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2022-07-22 14:34:50,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 13 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (16), 15 states have call predecessors, (16), 13 states have call successors, (16) [2022-07-22 14:34:50,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2022-07-22 14:34:50,318 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 49 [2022-07-22 14:34:50,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:50,318 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2022-07-22 14:34:50,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 14:34:50,318 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2022-07-22 14:34:50,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 14:34:50,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:50,318 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:50,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:50,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:50,526 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:50,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:50,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1549749125, now seen corresponding path program 1 times [2022-07-22 14:34:50,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:50,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135066127] [2022-07-22 14:34:50,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:50,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:50,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:50,528 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 14:34:50,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-22 14:34:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:50,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 14:34:50,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 14:34:50,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:34:50,917 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:50,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135066127] [2022-07-22 14:34:50,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135066127] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:50,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:50,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 14:34:50,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569009617] [2022-07-22 14:34:50,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:50,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 14:34:50,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:50,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 14:34:50,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-07-22 14:34:50,918 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 14:34:51,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:51,657 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2022-07-22 14:34:51,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 14:34:51,658 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2022-07-22 14:34:51,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:51,658 INFO L225 Difference]: With dead ends: 90 [2022-07-22 14:34:51,658 INFO L226 Difference]: Without dead ends: 69 [2022-07-22 14:34:51,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-07-22 14:34:51,659 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 42 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:51,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 585 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 400 Invalid, 0 Unknown, 36 Unchecked, 0.4s Time] [2022-07-22 14:34:51,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-22 14:34:51,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2022-07-22 14:34:51,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-22 14:34:51,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2022-07-22 14:34:51,662 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 49 [2022-07-22 14:34:51,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:51,662 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2022-07-22 14:34:51,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 14:34:51,662 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2022-07-22 14:34:51,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 14:34:51,662 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:51,663 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:51,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:51,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:51,870 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:51,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:51,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1451512262, now seen corresponding path program 1 times [2022-07-22 14:34:51,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:51,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021629313] [2022-07-22 14:34:51,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:51,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:51,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:51,872 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 14:34:51,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-22 14:34:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:51,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 14:34:51,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-22 14:34:52,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 14:34:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-22 14:34:52,992 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:52,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021629313] [2022-07-22 14:34:52,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021629313] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 14:34:52,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 14:34:52,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2022-07-22 14:34:52,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753326430] [2022-07-22 14:34:52,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 14:34:52,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 14:34:52,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:52,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 14:34:52,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-07-22 14:34:52,994 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 4 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-22 14:34:53,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:53,497 INFO L93 Difference]: Finished difference Result 88 states and 111 transitions. [2022-07-22 14:34:53,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 14:34:53,500 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 4 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 55 [2022-07-22 14:34:53,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:53,500 INFO L225 Difference]: With dead ends: 88 [2022-07-22 14:34:53,500 INFO L226 Difference]: Without dead ends: 55 [2022-07-22 14:34:53,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2022-07-22 14:34:53,501 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 131 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:53,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 261 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 307 Invalid, 0 Unknown, 24 Unchecked, 0.3s Time] [2022-07-22 14:34:53,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-22 14:34:53,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2022-07-22 14:34:53,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-22 14:34:53,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2022-07-22 14:34:53,503 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 55 [2022-07-22 14:34:53,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:53,503 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2022-07-22 14:34:53,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 4 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-22 14:34:53,504 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2022-07-22 14:34:53,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 14:34:53,504 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:53,504 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:53,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:53,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:53,712 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:53,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:53,712 INFO L85 PathProgramCache]: Analyzing trace with hash 2059347801, now seen corresponding path program 1 times [2022-07-22 14:34:53,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:53,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729053094] [2022-07-22 14:34:53,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:53,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:53,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:53,713 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 14:34:53,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-22 14:34:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:53,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 14:34:53,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 14:34:53,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:34:53,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:53,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729053094] [2022-07-22 14:34:53,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729053094] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:53,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:53,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 14:34:53,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251021187] [2022-07-22 14:34:53,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:53,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 14:34:53,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:53,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 14:34:53,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 14:34:53,876 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-22 14:34:53,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:53,995 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2022-07-22 14:34:53,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 14:34:53,996 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2022-07-22 14:34:53,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:53,996 INFO L225 Difference]: With dead ends: 65 [2022-07-22 14:34:53,996 INFO L226 Difference]: Without dead ends: 48 [2022-07-22 14:34:53,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-22 14:34:53,997 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 15 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:53,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 226 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 14:34:53,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-22 14:34:53,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-22 14:34:53,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-22 14:34:53,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-07-22 14:34:53,999 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 62 [2022-07-22 14:34:53,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:53,999 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-07-22 14:34:53,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-22 14:34:53,999 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-07-22 14:34:53,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 14:34:53,999 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:54,000 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:54,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:54,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:54,207 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:54,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:54,208 INFO L85 PathProgramCache]: Analyzing trace with hash 253909467, now seen corresponding path program 1 times [2022-07-22 14:34:54,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:54,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267782569] [2022-07-22 14:34:54,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:54,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:54,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:54,209 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 14:34:54,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-22 14:34:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:54,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 14:34:54,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 14:34:54,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:34:54,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:54,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267782569] [2022-07-22 14:34:54,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267782569] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:54,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:54,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 14:34:54,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193397466] [2022-07-22 14:34:54,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:54,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 14:34:54,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:54,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 14:34:54,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-22 14:34:54,415 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-22 14:34:54,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:54,695 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2022-07-22 14:34:54,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 14:34:54,695 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2022-07-22 14:34:54,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:54,698 INFO L225 Difference]: With dead ends: 69 [2022-07-22 14:34:54,698 INFO L226 Difference]: Without dead ends: 50 [2022-07-22 14:34:54,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-22 14:34:54,699 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 38 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:54,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 251 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 14:34:54,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-22 14:34:54,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-22 14:34:54,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 8 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-22 14:34:54,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-07-22 14:34:54,701 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 62 [2022-07-22 14:34:54,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:54,701 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-07-22 14:34:54,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-22 14:34:54,701 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-07-22 14:34:54,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 14:34:54,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:54,702 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:54,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:54,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:54,910 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:54,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:54,910 INFO L85 PathProgramCache]: Analyzing trace with hash 647887735, now seen corresponding path program 1 times [2022-07-22 14:34:54,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:54,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823693620] [2022-07-22 14:34:54,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:54,910 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:54,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:54,911 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 14:34:54,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-22 14:34:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:54,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 14:34:54,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 14:34:55,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:34:55,123 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:55,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823693620] [2022-07-22 14:34:55,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823693620] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:55,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:55,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 14:34:55,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669913136] [2022-07-22 14:34:55,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:55,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 14:34:55,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:55,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 14:34:55,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-22 14:34:55,124 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-22 14:34:55,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:55,440 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2022-07-22 14:34:55,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 14:34:55,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 63 [2022-07-22 14:34:55,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:55,440 INFO L225 Difference]: With dead ends: 71 [2022-07-22 14:34:55,440 INFO L226 Difference]: Without dead ends: 52 [2022-07-22 14:34:55,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-22 14:34:55,441 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 35 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:55,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 257 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 24 Unchecked, 0.2s Time] [2022-07-22 14:34:55,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-22 14:34:55,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-07-22 14:34:55,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 8 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-22 14:34:55,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-07-22 14:34:55,443 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 63 [2022-07-22 14:34:55,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:55,443 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-07-22 14:34:55,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-22 14:34:55,444 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-07-22 14:34:55,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 14:34:55,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:55,444 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:55,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:55,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:55,652 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:55,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:55,652 INFO L85 PathProgramCache]: Analyzing trace with hash -589254976, now seen corresponding path program 1 times [2022-07-22 14:34:55,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:55,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611848577] [2022-07-22 14:34:55,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:55,652 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:55,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:55,653 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 14:34:55,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-22 14:34:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:55,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 14:34:55,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-22 14:34:55,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 14:34:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-22 14:34:56,278 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:56,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1611848577] [2022-07-22 14:34:56,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1611848577] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 14:34:56,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 14:34:56,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-07-22 14:34:56,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297285225] [2022-07-22 14:34:56,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 14:34:56,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 14:34:56,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:56,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 14:34:56,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-07-22 14:34:56,279 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 15 states, 13 states have (on average 4.0) internal successors, (52), 15 states have internal predecessors, (52), 7 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-22 14:34:56,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:56,906 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2022-07-22 14:34:56,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 14:34:56,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.0) internal successors, (52), 15 states have internal predecessors, (52), 7 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) Word has length 63 [2022-07-22 14:34:56,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:56,907 INFO L225 Difference]: With dead ends: 84 [2022-07-22 14:34:56,907 INFO L226 Difference]: Without dead ends: 71 [2022-07-22 14:34:56,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-07-22 14:34:56,908 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 72 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:56,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 519 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 14:34:56,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-22 14:34:56,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 54. [2022-07-22 14:34:56,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 9 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2022-07-22 14:34:56,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2022-07-22 14:34:56,910 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 63 [2022-07-22 14:34:56,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:56,910 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2022-07-22 14:34:56,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.0) internal successors, (52), 15 states have internal predecessors, (52), 7 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-22 14:34:56,911 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2022-07-22 14:34:56,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-22 14:34:56,911 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:56,911 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:56,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:57,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:57,119 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:57,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:57,119 INFO L85 PathProgramCache]: Analyzing trace with hash -472199073, now seen corresponding path program 1 times [2022-07-22 14:34:57,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:57,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337350102] [2022-07-22 14:34:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:57,120 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:57,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:57,121 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 14:34:57,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-22 14:34:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:57,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 14:34:57,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 14:34:57,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:34:57,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:57,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337350102] [2022-07-22 14:34:57,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337350102] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:57,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:57,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 14:34:57,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170192858] [2022-07-22 14:34:57,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:57,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 14:34:57,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:57,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 14:34:57,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-22 14:34:57,335 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-22 14:34:57,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:57,629 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-07-22 14:34:57,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 14:34:57,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2022-07-22 14:34:57,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:57,630 INFO L225 Difference]: With dead ends: 75 [2022-07-22 14:34:57,630 INFO L226 Difference]: Without dead ends: 56 [2022-07-22 14:34:57,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-22 14:34:57,631 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 34 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:57,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 257 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 24 Unchecked, 0.2s Time] [2022-07-22 14:34:57,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-22 14:34:57,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-07-22 14:34:57,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 9 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2022-07-22 14:34:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2022-07-22 14:34:57,633 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 64 [2022-07-22 14:34:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:57,633 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2022-07-22 14:34:57,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-22 14:34:57,634 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2022-07-22 14:34:57,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-22 14:34:57,634 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:57,634 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:57,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:57,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:57,842 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:57,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:57,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1512938488, now seen corresponding path program 1 times [2022-07-22 14:34:57,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:57,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012407353] [2022-07-22 14:34:57,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:57,843 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:57,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:57,844 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 14:34:57,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-22 14:34:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:57,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 14:34:57,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-22 14:34:58,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 14:34:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-22 14:34:58,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:58,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012407353] [2022-07-22 14:34:58,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012407353] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 14:34:58,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 14:34:58,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-07-22 14:34:58,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440727711] [2022-07-22 14:34:58,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 14:34:58,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 14:34:58,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:58,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 14:34:58,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-07-22 14:34:58,570 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2022-07-22 14:34:58,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:58,761 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2022-07-22 14:34:58,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 14:34:58,762 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) Word has length 64 [2022-07-22 14:34:58,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:58,762 INFO L225 Difference]: With dead ends: 68 [2022-07-22 14:34:58,762 INFO L226 Difference]: Without dead ends: 55 [2022-07-22 14:34:58,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-07-22 14:34:58,763 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 112 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:58,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 229 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 14:34:58,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-22 14:34:58,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-07-22 14:34:58,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 38 states have internal predecessors, (40), 8 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-22 14:34:58,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2022-07-22 14:34:58,765 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 64 [2022-07-22 14:34:58,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:58,765 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2022-07-22 14:34:58,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2022-07-22 14:34:58,765 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2022-07-22 14:34:58,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 14:34:58,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:58,766 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:58,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-22 14:34:58,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:58,973 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:58,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:58,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1283662981, now seen corresponding path program 1 times [2022-07-22 14:34:58,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:58,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975798763] [2022-07-22 14:34:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:58,974 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:58,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:58,975 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 14:34:58,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-22 14:34:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:59,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 14:34:59,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 14:34:59,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:34:59,162 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:59,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975798763] [2022-07-22 14:34:59,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975798763] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:59,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:59,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 14:34:59,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274465250] [2022-07-22 14:34:59,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:59,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 14:34:59,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:59,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 14:34:59,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-22 14:34:59,164 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-22 14:34:59,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:59,498 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2022-07-22 14:34:59,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 14:34:59,498 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 65 [2022-07-22 14:34:59,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:59,499 INFO L225 Difference]: With dead ends: 68 [2022-07-22 14:34:59,499 INFO L226 Difference]: Without dead ends: 49 [2022-07-22 14:34:59,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-22 14:34:59,500 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:59,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 249 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 14:34:59,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-22 14:34:59,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-07-22 14:34:59,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 14:34:59,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-07-22 14:34:59,511 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 65 [2022-07-22 14:34:59,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:59,511 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-07-22 14:34:59,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-22 14:34:59,511 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-07-22 14:34:59,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 14:34:59,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:34:59,511 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:34:59,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-07-22 14:34:59,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:34:59,719 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:34:59,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:34:59,720 INFO L85 PathProgramCache]: Analyzing trace with hash -322048964, now seen corresponding path program 1 times [2022-07-22 14:34:59,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 14:34:59,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254057312] [2022-07-22 14:34:59,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:34:59,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 14:34:59,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 14:34:59,721 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 14:34:59,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-22 14:34:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:34:59,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 14:34:59,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:34:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-22 14:34:59,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:34:59,794 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 14:34:59,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254057312] [2022-07-22 14:34:59,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254057312] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:34:59,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:34:59,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 14:34:59,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785674201] [2022-07-22 14:34:59,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:34:59,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 14:34:59,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 14:34:59,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 14:34:59,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:59,795 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 14:34:59,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:34:59,811 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-07-22 14:34:59,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 14:34:59,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 65 [2022-07-22 14:34:59,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:34:59,811 INFO L225 Difference]: With dead ends: 50 [2022-07-22 14:34:59,811 INFO L226 Difference]: Without dead ends: 0 [2022-07-22 14:34:59,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 14:34:59,812 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 14:34:59,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 102 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 14:34:59,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-22 14:34:59,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-22 14:34:59,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 14:34:59,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-22 14:34:59,813 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 65 [2022-07-22 14:34:59,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:34:59,813 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 14:34:59,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 14:34:59,813 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-22 14:34:59,813 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-22 14:34:59,815 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-07-22 14:34:59,815 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 14:34:59,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-07-22 14:35:00,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 14:35:00,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-22 14:35:00,704 INFO L899 garLoopResultBuilder]: For program point isnan_floatFINAL(line 59) no Hoare annotation was computed. [2022-07-22 14:35:00,705 INFO L902 garLoopResultBuilder]: At program point isnan_floatENTRY(line 59) the Hoare annotation is: true [2022-07-22 14:35:00,705 INFO L899 garLoopResultBuilder]: For program point isnan_floatEXIT(line 59) no Hoare annotation was computed. [2022-07-22 14:35:00,705 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 83) no Hoare annotation was computed. [2022-07-22 14:35:00,705 INFO L899 garLoopResultBuilder]: For program point L77(line 77) no Hoare annotation was computed. [2022-07-22 14:35:00,705 INFO L895 garLoopResultBuilder]: At program point L40(line 40) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_fmin_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse2 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse0 (fp.eq |ULTIMATE.start_fmin_float_~y#1| |ULTIMATE.start_fmin_float_~y#1|))) (or (and (not .cse0) .cse1 .cse2 (= |ULTIMATE.start_fmin_float_~x#1| |ULTIMATE.start_main_~x~0#1|)) (and (not (fp.eq |ULTIMATE.start_fmin_float_~x#1| |ULTIMATE.start_fmin_float_~x#1|)) .cse1 (not .cse2) .cse0))) [2022-07-22 14:35:00,705 INFO L899 garLoopResultBuilder]: For program point L40-1(lines 40 41) no Hoare annotation was computed. [2022-07-22 14:35:00,705 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-22 14:35:00,705 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-22 14:35:00,705 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-22 14:35:00,705 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 77) no Hoare annotation was computed. [2022-07-22 14:35:00,705 INFO L895 garLoopResultBuilder]: At program point L82(line 82) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmin_float_~y#1| |ULTIMATE.start_main_~y~0#1|))) (or (and (not (fp.eq |ULTIMATE.start_fmin_float_~y#1| |ULTIMATE.start_fmin_float_~y#1|)) .cse0 (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_fmin_float_#res#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_fmin_float_~x#1| |ULTIMATE.start_main_~x~0#1|)) (and .cse0 (not (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))))) [2022-07-22 14:35:00,705 INFO L899 garLoopResultBuilder]: For program point L82-1(line 82) no Hoare annotation was computed. [2022-07-22 14:35:00,705 INFO L899 garLoopResultBuilder]: For program point L82-2(line 82) no Hoare annotation was computed. [2022-07-22 14:35:00,705 INFO L895 garLoopResultBuilder]: At program point L82-3(line 82) the Hoare annotation is: (and (not (fp.eq |ULTIMATE.start_fmin_float_~y#1| |ULTIMATE.start_fmin_float_~y#1|)) (= |ULTIMATE.start_fmin_float_~y#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_fmin_float_#res#1| |ULTIMATE.start_main_~x~0#1|) (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_fmin_float_~x#1| |ULTIMATE.start_main_~x~0#1|)) [2022-07-22 14:35:00,705 INFO L899 garLoopResultBuilder]: For program point L82-4(line 82) no Hoare annotation was computed. [2022-07-22 14:35:00,705 INFO L899 garLoopResultBuilder]: For program point L82-6(lines 82 85) no Hoare annotation was computed. [2022-07-22 14:35:00,705 INFO L902 garLoopResultBuilder]: At program point L70(line 70) the Hoare annotation is: true [2022-07-22 14:35:00,705 INFO L899 garLoopResultBuilder]: For program point L70-1(line 70) no Hoare annotation was computed. [2022-07-22 14:35:00,705 INFO L899 garLoopResultBuilder]: For program point L70-2(line 70) no Hoare annotation was computed. [2022-07-22 14:35:00,705 INFO L895 garLoopResultBuilder]: At program point L70-3(line 70) the Hoare annotation is: (and |ULTIMATE.start_main_#t~short13#1| (= |ULTIMATE.start_main_#t~ret11#1| (_ bv1 32)) (not (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) [2022-07-22 14:35:00,705 INFO L899 garLoopResultBuilder]: For program point L70-4(line 70) no Hoare annotation was computed. [2022-07-22 14:35:00,705 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-22 14:35:00,705 INFO L899 garLoopResultBuilder]: For program point L70-6(line 70) no Hoare annotation was computed. [2022-07-22 14:35:00,706 INFO L899 garLoopResultBuilder]: For program point L70-7(lines 70 71) no Hoare annotation was computed. [2022-07-22 14:35:00,706 INFO L899 garLoopResultBuilder]: For program point L70-9(lines 70 86) no Hoare annotation was computed. [2022-07-22 14:35:00,706 INFO L899 garLoopResultBuilder]: For program point L70-11(lines 70 86) no Hoare annotation was computed. [2022-07-22 14:35:00,706 INFO L899 garLoopResultBuilder]: For program point L83(line 83) no Hoare annotation was computed. [2022-07-22 14:35:00,706 INFO L895 garLoopResultBuilder]: At program point L71(line 71) the Hoare annotation is: (let ((.cse0 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse1 (not |ULTIMATE.start_main_#t~short17#1|)) (.cse2 (not |ULTIMATE.start_main_#t~short13#1|))) (or (and (= |ULTIMATE.start_main_#t~ret11#1| (_ bv0 32)) .cse0 .cse1 .cse2) (and (= |ULTIMATE.start_main_#t~ret12#1| (_ bv1 32)) (= |ULTIMATE.start_main_#t~ret11#1| (_ bv1 32)) (not (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (not .cse0) .cse1 .cse2))) [2022-07-22 14:35:00,706 INFO L899 garLoopResultBuilder]: For program point L71-1(line 71) no Hoare annotation was computed. [2022-07-22 14:35:00,706 INFO L895 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_fmin_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse2 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse0 (fp.eq |ULTIMATE.start_fmin_float_~y#1| |ULTIMATE.start_fmin_float_~y#1|))) (or (and (not .cse0) .cse1 .cse2 (= |ULTIMATE.start_fmin_float_~x#1| |ULTIMATE.start_main_~x~0#1|)) (and (not (fp.eq |ULTIMATE.start_fmin_float_~x#1| |ULTIMATE.start_fmin_float_~x#1|)) .cse1 (not .cse2) .cse0))) [2022-07-22 14:35:00,706 INFO L899 garLoopResultBuilder]: For program point L71-2(line 71) no Hoare annotation was computed. [2022-07-22 14:35:00,707 INFO L899 garLoopResultBuilder]: For program point L38-1(lines 38 39) no Hoare annotation was computed. [2022-07-22 14:35:00,707 INFO L895 garLoopResultBuilder]: At program point L71-3(line 71) the Hoare annotation is: (and (= |ULTIMATE.start_main_#t~ret11#1| (_ bv0 32)) (= |ULTIMATE.start_main_#t~ret14#1| (_ bv0 32)) |ULTIMATE.start_main_#t~short16#1| (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|) (not |ULTIMATE.start_main_#t~short17#1|) (not |ULTIMATE.start_main_#t~short13#1|)) [2022-07-22 14:35:00,707 INFO L899 garLoopResultBuilder]: For program point L71-4(line 71) no Hoare annotation was computed. [2022-07-22 14:35:00,707 INFO L899 garLoopResultBuilder]: For program point L71-6(line 71) no Hoare annotation was computed. [2022-07-22 14:35:00,707 INFO L902 garLoopResultBuilder]: At program point L88(lines 61 89) the Hoare annotation is: true [2022-07-22 14:35:00,707 INFO L895 garLoopResultBuilder]: At program point L76(line 76) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmin_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (or (and (not (fp.eq |ULTIMATE.start_fmin_float_~y#1| |ULTIMATE.start_fmin_float_~y#1|)) .cse0 (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_fmin_float_#res#1| |ULTIMATE.start_main_~x~0#1|) .cse1 (= |ULTIMATE.start_fmin_float_~x#1| |ULTIMATE.start_main_~x~0#1|)) (and (= |ULTIMATE.start_fmin_float_#res#1| |ULTIMATE.start_main_~y~0#1|) (not (fp.eq |ULTIMATE.start_fmin_float_~x#1| |ULTIMATE.start_fmin_float_~x#1|)) .cse0 (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~y~0#1|) (not .cse1) (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)))) [2022-07-22 14:35:00,707 INFO L899 garLoopResultBuilder]: For program point L43(line 43) no Hoare annotation was computed. [2022-07-22 14:35:00,707 INFO L899 garLoopResultBuilder]: For program point L76-1(line 76) no Hoare annotation was computed. [2022-07-22 14:35:00,707 INFO L899 garLoopResultBuilder]: For program point L76-2(line 76) no Hoare annotation was computed. [2022-07-22 14:35:00,707 INFO L899 garLoopResultBuilder]: For program point L43-2(line 43) no Hoare annotation was computed. [2022-07-22 14:35:00,707 INFO L895 garLoopResultBuilder]: At program point L76-3(line 76) the Hoare annotation is: (and (= |ULTIMATE.start_fmin_float_#res#1| |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_#t~short21#1| (= |ULTIMATE.start_fmin_float_~y#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~y~0#1|) (not (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) [2022-07-22 14:35:00,707 INFO L895 garLoopResultBuilder]: At program point L43-3(lines 37 44) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmin_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (or (and (not (fp.eq |ULTIMATE.start_fmin_float_~y#1| |ULTIMATE.start_fmin_float_~y#1|)) .cse0 (= |ULTIMATE.start_fmin_float_#res#1| |ULTIMATE.start_main_~x~0#1|) .cse1 (= |ULTIMATE.start_fmin_float_~x#1| |ULTIMATE.start_main_~x~0#1|)) (and (= |ULTIMATE.start_fmin_float_#res#1| |ULTIMATE.start_main_~y~0#1|) (not (fp.eq |ULTIMATE.start_fmin_float_~x#1| |ULTIMATE.start_fmin_float_~x#1|)) .cse0 (not .cse1) (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)))) [2022-07-22 14:35:00,707 INFO L899 garLoopResultBuilder]: For program point L76-4(line 76) no Hoare annotation was computed. [2022-07-22 14:35:00,707 INFO L899 garLoopResultBuilder]: For program point L76-6(lines 76 79) no Hoare annotation was computed. [2022-07-22 14:35:00,707 INFO L899 garLoopResultBuilder]: For program point L31(lines 31 34) no Hoare annotation was computed. [2022-07-22 14:35:00,707 INFO L899 garLoopResultBuilder]: For program point __fpclassify_floatFINAL(lines 14 35) no Hoare annotation was computed. [2022-07-22 14:35:00,707 INFO L899 garLoopResultBuilder]: For program point L25(lines 25 34) no Hoare annotation was computed. [2022-07-22 14:35:00,707 INFO L899 garLoopResultBuilder]: For program point L17-1(lines 17 21) no Hoare annotation was computed. [2022-07-22 14:35:00,708 INFO L895 garLoopResultBuilder]: At program point L17-2(lines 17 21) the Hoare annotation is: (= |__fpclassify_float_#in~x| __fpclassify_float_~x) [2022-07-22 14:35:00,708 INFO L899 garLoopResultBuilder]: For program point L17-3(lines 14 35) no Hoare annotation was computed. [2022-07-22 14:35:00,708 INFO L899 garLoopResultBuilder]: For program point L28(lines 28 34) no Hoare annotation was computed. [2022-07-22 14:35:00,708 INFO L902 garLoopResultBuilder]: At program point __fpclassify_floatENTRY(lines 14 35) the Hoare annotation is: true [2022-07-22 14:35:00,708 INFO L899 garLoopResultBuilder]: For program point __fpclassify_floatEXIT(lines 14 35) no Hoare annotation was computed. [2022-07-22 14:35:00,710 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:35:00,712 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 14:35:00,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 02:35:00 BoogieIcfgContainer [2022-07-22 14:35:00,723 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 14:35:00,724 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 14:35:00,724 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 14:35:00,724 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 14:35:00,724 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 02:34:36" (3/4) ... [2022-07-22 14:35:00,726 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-22 14:35:00,730 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure isnan_float [2022-07-22 14:35:00,730 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_float [2022-07-22 14:35:00,735 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2022-07-22 14:35:00,735 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2022-07-22 14:35:00,736 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-22 14:35:00,736 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-22 14:35:00,760 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: \old(x) == x [2022-07-22 14:35:00,760 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((!~fp.eq~FLOAT(y, y) && y == y) && \result == x) && ~fp.eq~FLOAT(x, x)) && x == x) || ((((\result == y && !~fp.eq~FLOAT(x, x)) && y == y) && !~fp.eq~FLOAT(x, x)) && ~fp.eq~FLOAT(y, y)) [2022-07-22 14:35:00,777 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-22 14:35:00,777 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 14:35:00,777 INFO L158 Benchmark]: Toolchain (without parser) took 25118.95ms. Allocated memory was 50.3MB in the beginning and 107.0MB in the end (delta: 56.6MB). Free memory was 25.6MB in the beginning and 78.0MB in the end (delta: -52.4MB). Peak memory consumption was 3.7MB. Max. memory is 16.1GB. [2022-07-22 14:35:00,778 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 50.3MB. Free memory was 32.1MB in the beginning and 32.1MB in the end (delta: 33.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 14:35:00,778 INFO L158 Benchmark]: CACSL2BoogieTranslator took 225.27ms. Allocated memory was 50.3MB in the beginning and 71.3MB in the end (delta: 21.0MB). Free memory was 25.5MB in the beginning and 52.8MB in the end (delta: -27.3MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. [2022-07-22 14:35:00,781 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.95ms. Allocated memory is still 71.3MB. Free memory was 52.8MB in the beginning and 51.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 14:35:00,781 INFO L158 Benchmark]: Boogie Preprocessor took 17.96ms. Allocated memory is still 71.3MB. Free memory was 51.0MB in the beginning and 49.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 14:35:00,781 INFO L158 Benchmark]: RCFGBuilder took 310.00ms. Allocated memory is still 71.3MB. Free memory was 49.6MB in the beginning and 51.8MB in the end (delta: -2.3MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. [2022-07-22 14:35:00,785 INFO L158 Benchmark]: TraceAbstraction took 24485.28ms. Allocated memory was 71.3MB in the beginning and 107.0MB in the end (delta: 35.7MB). Free memory was 51.2MB in the beginning and 81.2MB in the end (delta: -30.0MB). Peak memory consumption was 60.9MB. Max. memory is 16.1GB. [2022-07-22 14:35:00,785 INFO L158 Benchmark]: Witness Printer took 53.13ms. Allocated memory is still 107.0MB. Free memory was 81.2MB in the beginning and 78.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-22 14:35:00,787 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 50.3MB. Free memory was 32.1MB in the beginning and 32.1MB in the end (delta: 33.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 225.27ms. Allocated memory was 50.3MB in the beginning and 71.3MB in the end (delta: 21.0MB). Free memory was 25.5MB in the beginning and 52.8MB in the end (delta: -27.3MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.95ms. Allocated memory is still 71.3MB. Free memory was 52.8MB in the beginning and 51.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.96ms. Allocated memory is still 71.3MB. Free memory was 51.0MB in the beginning and 49.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 310.00ms. Allocated memory is still 71.3MB. Free memory was 49.6MB in the beginning and 51.8MB in the end (delta: -2.3MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. * TraceAbstraction took 24485.28ms. Allocated memory was 71.3MB in the beginning and 107.0MB in the end (delta: 35.7MB). Free memory was 51.2MB in the beginning and 81.2MB in the end (delta: -30.0MB). Peak memory consumption was 60.9MB. Max. memory is 16.1GB. * Witness Printer took 53.13ms. Allocated memory is still 107.0MB. Free memory was 81.2MB in the beginning and 78.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. 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 - PositiveResult [Line: 77]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 83]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 55 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 24.4s, OverallIterations: 30, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 8.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1332 SdHoareTripleChecker+Valid, 6.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1257 mSDsluCounter, 9173 SdHoareTripleChecker+Invalid, 5.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 108 IncrementalHoareTripleChecker+Unchecked, 7355 mSDsCounter, 334 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4147 IncrementalHoareTripleChecker+Invalid, 4589 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 334 mSolverCounterUnsat, 1818 mSDtfsCounter, 4147 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2044 GetRequests, 1738 SyntacticMatches, 2 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=14, InterpolantAutomatonStates: 243, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 30 MinimizatonAttempts, 209 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 137 PreInvPairs, 163 NumberOfFragments, 264 HoareAnnotationTreeSize, 137 FomulaSimplifications, 1064 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 15 FomulaSimplificationsInter, 1513 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 6.4s InterpolantComputationTime, 1490 NumberOfCodeBlocks, 1490 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1902 ConstructedInterpolants, 9 QuantifiedInterpolants, 5611 SizeOfPredicates, 152 NumberOfNonLiveVariables, 3436 ConjunctsInSsa, 301 ConjunctsInUnsatCore, 40 InterpolantComputations, 20 PerfectInterpolantSequences, 1033/1145 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 61]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: \old(x) == x - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((((!~fp.eq~FLOAT(y, y) && y == y) && \result == x) && ~fp.eq~FLOAT(x, x)) && x == x) || ((((\result == y && !~fp.eq~FLOAT(x, x)) && y == y) && !~fp.eq~FLOAT(x, x)) && ~fp.eq~FLOAT(y, y)) RESULT: Ultimate proved your program to be correct! [2022-07-22 14:35:00,820 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 Writing output log to file Ultimate.log Result: TRUE