./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Ackermann02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/Ackermann02.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 20c02b81d1b1bc312ccc75d6e9b31c6252d69e8a6e2560afe3a2a95a3e53102a --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-22 00:40:10,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 00:40:10,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 00:40:10,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 00:40:10,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 00:40:10,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 00:40:10,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 00:40:10,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 00:40:10,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 00:40:10,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 00:40:10,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 00:40:10,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 00:40:10,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 00:40:10,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 00:40:10,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 00:40:10,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 00:40:10,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 00:40:10,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 00:40:10,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 00:40:10,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 00:40:10,498 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 00:40:10,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 00:40:10,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 00:40:10,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 00:40:10,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 00:40:10,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 00:40:10,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 00:40:10,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 00:40:10,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 00:40:10,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 00:40:10,511 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 00:40:10,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 00:40:10,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 00:40:10,512 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 00:40:10,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 00:40:10,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 00:40:10,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 00:40:10,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 00:40:10,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 00:40:10,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 00:40:10,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 00:40:10,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 00:40:10,521 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-07-22 00:40:10,542 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 00:40:10,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 00:40:10,543 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 00:40:10,543 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 00:40:10,543 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 00:40:10,544 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 00:40:10,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 00:40:10,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 00:40:10,544 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 00:40:10,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 00:40:10,545 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 00:40:10,545 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-22 00:40:10,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 00:40:10,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 00:40:10,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 00:40:10,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 00:40:10,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 00:40:10,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 00:40:10,546 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-07-22 00:40:10,547 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 00:40:10,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 00:40:10,547 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 00:40:10,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 00:40:10,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 00:40:10,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 00:40:10,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 00:40:10,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 00:40:10,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 00:40:10,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 00:40:10,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 00:40:10,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 00:40:10,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 00:40:10,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 00:40:10,549 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20c02b81d1b1bc312ccc75d6e9b31c6252d69e8a6e2560afe3a2a95a3e53102a [2022-07-22 00:40:10,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 00:40:10,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 00:40:10,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 00:40:10,818 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 00:40:10,818 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 00:40:10,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann02.c [2022-07-22 00:40:10,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f2f16213/7c5dc8d6fc1e448f86be03866bd5ee33/FLAG61d4e7134 [2022-07-22 00:40:11,169 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 00:40:11,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann02.c [2022-07-22 00:40:11,174 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f2f16213/7c5dc8d6fc1e448f86be03866bd5ee33/FLAG61d4e7134 [2022-07-22 00:40:11,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f2f16213/7c5dc8d6fc1e448f86be03866bd5ee33 [2022-07-22 00:40:11,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 00:40:11,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 00:40:11,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 00:40:11,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 00:40:11,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 00:40:11,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:40:11" (1/1) ... [2022-07-22 00:40:11,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47446294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:11, skipping insertion in model container [2022-07-22 00:40:11,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:40:11" (1/1) ... [2022-07-22 00:40:11,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 00:40:11,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 00:40:11,819 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/recursive/Ackermann02.c[1157,1170] [2022-07-22 00:40:11,819 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 00:40:11,826 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 00:40:11,844 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/recursive/Ackermann02.c[1157,1170] [2022-07-22 00:40:11,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 00:40:11,856 INFO L208 MainTranslator]: Completed translation [2022-07-22 00:40:11,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:11 WrapperNode [2022-07-22 00:40:11,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 00:40:11,859 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 00:40:11,859 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 00:40:11,859 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 00:40:11,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:11" (1/1) ... [2022-07-22 00:40:11,873 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:11" (1/1) ... [2022-07-22 00:40:11,890 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-07-22 00:40:11,890 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 00:40:11,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 00:40:11,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 00:40:11,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 00:40:11,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:11" (1/1) ... [2022-07-22 00:40:11,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:11" (1/1) ... [2022-07-22 00:40:11,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:11" (1/1) ... [2022-07-22 00:40:11,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:11" (1/1) ... [2022-07-22 00:40:11,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:11" (1/1) ... [2022-07-22 00:40:11,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:11" (1/1) ... [2022-07-22 00:40:11,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:11" (1/1) ... [2022-07-22 00:40:11,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 00:40:11,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 00:40:11,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 00:40:11,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 00:40:11,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:11" (1/1) ... [2022-07-22 00:40:11,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 00:40:11,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:11,956 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 00:40:11,974 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 00:40:11,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 00:40:11,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 00:40:11,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 00:40:11,987 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-07-22 00:40:11,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-07-22 00:40:11,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 00:40:12,046 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 00:40:12,047 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 00:40:12,182 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 00:40:12,186 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 00:40:12,186 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 00:40:12,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:40:12 BoogieIcfgContainer [2022-07-22 00:40:12,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 00:40:12,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 00:40:12,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 00:40:12,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 00:40:12,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:40:11" (1/3) ... [2022-07-22 00:40:12,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@791607ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:40:12, skipping insertion in model container [2022-07-22 00:40:12,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:11" (2/3) ... [2022-07-22 00:40:12,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@791607ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:40:12, skipping insertion in model container [2022-07-22 00:40:12,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:40:12" (3/3) ... [2022-07-22 00:40:12,192 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann02.c [2022-07-22 00:40:12,217 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 00:40:12,218 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-07-22 00:40:12,272 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 00:40:12,279 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=FINITE_AUTOMATA, 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@7b3a7306, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@33e662f5 [2022-07-22 00:40:12,279 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-22 00:40:12,282 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 00:40:12,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-22 00:40:12,290 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:12,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:12,292 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:12,299 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2022-07-22 00:40:12,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:12,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647171741] [2022-07-22 00:40:12,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:12,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:12,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:12,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647171741] [2022-07-22 00:40:12,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647171741] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:40:12,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:40:12,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:40:12,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714621385] [2022-07-22 00:40:12,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:40:12,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:40:12,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:12,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:40:12,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:40:12,489 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:12,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:12,584 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2022-07-22 00:40:12,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 00:40:12,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-22 00:40:12,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:12,591 INFO L225 Difference]: With dead ends: 73 [2022-07-22 00:40:12,592 INFO L226 Difference]: Without dead ends: 59 [2022-07-22 00:40:12,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 00:40:12,596 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 55 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:12,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 125 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:40:12,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-22 00:40:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2022-07-22 00:40:12,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 42 states have internal predecessors, (52), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 00:40:12,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-07-22 00:40:12,631 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2022-07-22 00:40:12,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:12,632 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-07-22 00:40:12,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-07-22 00:40:12,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 00:40:12,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:12,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:12,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 00:40:12,633 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:12,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:12,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2022-07-22 00:40:12,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:12,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915633624] [2022-07-22 00:40:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:12,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:12,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:12,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915633624] [2022-07-22 00:40:12,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915633624] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:40:12,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:40:12,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:40:12,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667901057] [2022-07-22 00:40:12,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:40:12,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:40:12,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:12,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:40:12,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:40:12,665 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:12,706 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-07-22 00:40:12,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 00:40:12,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-22 00:40:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:12,708 INFO L225 Difference]: With dead ends: 51 [2022-07-22 00:40:12,708 INFO L226 Difference]: Without dead ends: 49 [2022-07-22 00:40:12,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 00:40:12,709 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:12,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:40:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-22 00:40:12,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-22 00:40:12,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.411764705882353) internal successors, (48), 40 states have internal predecessors, (48), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 00:40:12,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-07-22 00:40:12,717 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2022-07-22 00:40:12,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:12,717 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-07-22 00:40:12,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:12,718 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-07-22 00:40:12,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 00:40:12,718 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:12,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:12,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 00:40:12,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:12,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:12,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2022-07-22 00:40:12,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:12,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403917240] [2022-07-22 00:40:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:12,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:12,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:12,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403917240] [2022-07-22 00:40:12,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403917240] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:40:12,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:40:12,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:40:12,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519970633] [2022-07-22 00:40:12,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:40:12,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:40:12,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:12,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:40:12,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:40:12,751 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:12,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:12,804 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2022-07-22 00:40:12,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 00:40:12,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-22 00:40:12,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:12,806 INFO L225 Difference]: With dead ends: 76 [2022-07-22 00:40:12,806 INFO L226 Difference]: Without dead ends: 75 [2022-07-22 00:40:12,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 00:40:12,807 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 43 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:12,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 87 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:40:12,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-22 00:40:12,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2022-07-22 00:40:12,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 55 states have internal predecessors, (68), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 00:40:12,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-07-22 00:40:12,821 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 9 [2022-07-22 00:40:12,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:12,821 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-07-22 00:40:12,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:12,822 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-07-22 00:40:12,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 00:40:12,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:12,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:12,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 00:40:12,823 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:12,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:12,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2022-07-22 00:40:12,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:12,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763922956] [2022-07-22 00:40:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:12,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:12,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:12,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763922956] [2022-07-22 00:40:12,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763922956] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:40:12,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:40:12,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:40:12,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573953527] [2022-07-22 00:40:12,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:40:12,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:40:12,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:12,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:40:12,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:40:12,870 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:12,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:12,956 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2022-07-22 00:40:12,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 00:40:12,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-22 00:40:12,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:12,959 INFO L225 Difference]: With dead ends: 116 [2022-07-22 00:40:12,959 INFO L226 Difference]: Without dead ends: 108 [2022-07-22 00:40:12,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 00:40:12,960 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 39 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:12,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 85 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:40:12,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-22 00:40:12,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-07-22 00:40:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.337837837837838) internal successors, (99), 81 states have internal predecessors, (99), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 00:40:12,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2022-07-22 00:40:12,980 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 10 [2022-07-22 00:40:12,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:12,980 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2022-07-22 00:40:12,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:12,980 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2022-07-22 00:40:12,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-22 00:40:12,981 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:12,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:12,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 00:40:12,981 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:12,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:12,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1072007509, now seen corresponding path program 1 times [2022-07-22 00:40:12,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:12,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212541154] [2022-07-22 00:40:12,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:12,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:13,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:13,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:13,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212541154] [2022-07-22 00:40:13,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212541154] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:40:13,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:40:13,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:40:13,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990691250] [2022-07-22 00:40:13,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:40:13,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:40:13,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:13,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:40:13,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:40:13,013 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:13,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:13,078 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2022-07-22 00:40:13,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 00:40:13,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-22 00:40:13,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:13,080 INFO L225 Difference]: With dead ends: 109 [2022-07-22 00:40:13,080 INFO L226 Difference]: Without dead ends: 108 [2022-07-22 00:40:13,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 00:40:13,081 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:13,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 92 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:40:13,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-22 00:40:13,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-07-22 00:40:13,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 81 states have internal predecessors, (97), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 00:40:13,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2022-07-22 00:40:13,097 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 12 [2022-07-22 00:40:13,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:13,097 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2022-07-22 00:40:13,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:13,098 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2022-07-22 00:40:13,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 00:40:13,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:13,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:13,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 00:40:13,099 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:13,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:13,099 INFO L85 PathProgramCache]: Analyzing trace with hash 219392943, now seen corresponding path program 1 times [2022-07-22 00:40:13,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:13,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377784054] [2022-07-22 00:40:13,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:13,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:13,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:13,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:13,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377784054] [2022-07-22 00:40:13,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377784054] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:40:13,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:40:13,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:40:13,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535358080] [2022-07-22 00:40:13,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:40:13,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:40:13,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:13,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:40:13,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:40:13,186 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:13,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:13,234 INFO L93 Difference]: Finished difference Result 174 states and 233 transitions. [2022-07-22 00:40:13,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 00:40:13,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-22 00:40:13,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:13,236 INFO L225 Difference]: With dead ends: 174 [2022-07-22 00:40:13,236 INFO L226 Difference]: Without dead ends: 103 [2022-07-22 00:40:13,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 00:40:13,238 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 30 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:13,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 77 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:40:13,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-22 00:40:13,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2022-07-22 00:40:13,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.295774647887324) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-22 00:40:13,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2022-07-22 00:40:13,261 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 16 [2022-07-22 00:40:13,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:13,261 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2022-07-22 00:40:13,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:13,262 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2022-07-22 00:40:13,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 00:40:13,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:13,263 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:13,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 00:40:13,263 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:13,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:13,264 INFO L85 PathProgramCache]: Analyzing trace with hash 219399894, now seen corresponding path program 1 times [2022-07-22 00:40:13,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:13,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288087590] [2022-07-22 00:40:13,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:13,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:13,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:13,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288087590] [2022-07-22 00:40:13,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288087590] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:13,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712405905] [2022-07-22 00:40:13,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:13,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:13,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:13,348 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:13,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 00:40:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:13,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 00:40:13,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:13,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:13,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712405905] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:13,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:13,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-22 00:40:13,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5179583] [2022-07-22 00:40:13,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:13,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 00:40:13,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:13,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 00:40:13,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-22 00:40:13,530 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:13,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:13,752 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2022-07-22 00:40:13,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 00:40:13,753 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-22 00:40:13,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:13,760 INFO L225 Difference]: With dead ends: 274 [2022-07-22 00:40:13,760 INFO L226 Difference]: Without dead ends: 272 [2022-07-22 00:40:13,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-07-22 00:40:13,770 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 217 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:13,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 193 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:40:13,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-07-22 00:40:13,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2022-07-22 00:40:13,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 182 states have (on average 1.2637362637362637) internal successors, (230), 189 states have internal predecessors, (230), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-22 00:40:13,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2022-07-22 00:40:13,808 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 16 [2022-07-22 00:40:13,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:13,809 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2022-07-22 00:40:13,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:13,809 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2022-07-22 00:40:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-22 00:40:13,810 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:13,810 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:13,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 00:40:14,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:14,028 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:14,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:14,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1162887243, now seen corresponding path program 1 times [2022-07-22 00:40:14,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:14,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210944930] [2022-07-22 00:40:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:14,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:14,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:14,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210944930] [2022-07-22 00:40:14,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210944930] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:14,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852411411] [2022-07-22 00:40:14,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:14,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:14,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:14,074 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:14,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 00:40:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:14,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 00:40:14,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:14,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:40:14,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852411411] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:40:14,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 00:40:14,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-07-22 00:40:14,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038303406] [2022-07-22 00:40:14,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:40:14,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:40:14,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:14,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:40:14,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-22 00:40:14,137 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:14,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:14,225 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2022-07-22 00:40:14,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 00:40:14,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-22 00:40:14,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:14,228 INFO L225 Difference]: With dead ends: 328 [2022-07-22 00:40:14,228 INFO L226 Difference]: Without dead ends: 327 [2022-07-22 00:40:14,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-22 00:40:14,229 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 40 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:14,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 100 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:40:14,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-07-22 00:40:14,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2022-07-22 00:40:14,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 227 states have (on average 1.2599118942731278) internal successors, (286), 234 states have internal predecessors, (286), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-07-22 00:40:14,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2022-07-22 00:40:14,257 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 17 [2022-07-22 00:40:14,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:14,257 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2022-07-22 00:40:14,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:14,257 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2022-07-22 00:40:14,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 00:40:14,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:14,258 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:14,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:14,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-22 00:40:14,474 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:14,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:14,475 INFO L85 PathProgramCache]: Analyzing trace with hash 523262015, now seen corresponding path program 1 times [2022-07-22 00:40:14,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:14,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338018174] [2022-07-22 00:40:14,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:14,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:14,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:14,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338018174] [2022-07-22 00:40:14,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338018174] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:14,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449632917] [2022-07-22 00:40:14,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:14,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:14,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:14,511 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:14,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 00:40:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:14,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 00:40:14,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:14,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:14,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449632917] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:14,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:14,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-22 00:40:14,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205517259] [2022-07-22 00:40:14,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:14,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 00:40:14,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:14,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 00:40:14,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-22 00:40:14,643 INFO L87 Difference]: Start difference. First operand 293 states and 373 transitions. Second operand has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:14,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:14,829 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2022-07-22 00:40:14,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 00:40:14,830 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-22 00:40:14,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:14,832 INFO L225 Difference]: With dead ends: 591 [2022-07-22 00:40:14,832 INFO L226 Difference]: Without dead ends: 590 [2022-07-22 00:40:14,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-07-22 00:40:14,835 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 240 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:14,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 157 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:40:14,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-07-22 00:40:14,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2022-07-22 00:40:14,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.203931203931204) internal successors, (490), 414 states have internal predecessors, (490), 81 states have call successors, (81), 28 states have call predecessors, (81), 27 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-07-22 00:40:14,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2022-07-22 00:40:14,874 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 20 [2022-07-22 00:40:14,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:14,875 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2022-07-22 00:40:14,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:14,875 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2022-07-22 00:40:14,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 00:40:14,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:14,878 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:14,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:15,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:15,094 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:15,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:15,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2022-07-22 00:40:15,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:15,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558551519] [2022-07-22 00:40:15,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:15,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:15,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 00:40:15,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:15,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558551519] [2022-07-22 00:40:15,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558551519] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:15,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355356443] [2022-07-22 00:40:15,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:15,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:15,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:15,170 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:15,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 00:40:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:15,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 00:40:15,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 00:40:15,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:15,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 00:40:15,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355356443] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:15,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:15,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-07-22 00:40:15,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437112430] [2022-07-22 00:40:15,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:15,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 00:40:15,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:15,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 00:40:15,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-07-22 00:40:15,416 INFO L87 Difference]: Start difference. First operand 521 states and 649 transitions. Second operand has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 00:40:15,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:15,910 INFO L93 Difference]: Finished difference Result 1286 states and 1798 transitions. [2022-07-22 00:40:15,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 00:40:15,911 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2022-07-22 00:40:15,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:15,914 INFO L225 Difference]: With dead ends: 1286 [2022-07-22 00:40:15,915 INFO L226 Difference]: Without dead ends: 895 [2022-07-22 00:40:15,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 00:40:15,918 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 220 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:15,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 93 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:40:15,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-07-22 00:40:15,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 701. [2022-07-22 00:40:15,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 547 states have (on average 1.1956124314442413) internal successors, (654), 571 states have internal predecessors, (654), 102 states have call successors, (102), 44 states have call predecessors, (102), 46 states have return successors, (106), 85 states have call predecessors, (106), 78 states have call successors, (106) [2022-07-22 00:40:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 862 transitions. [2022-07-22 00:40:15,970 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 862 transitions. Word has length 24 [2022-07-22 00:40:15,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:15,971 INFO L495 AbstractCegarLoop]: Abstraction has 701 states and 862 transitions. [2022-07-22 00:40:15,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 00:40:15,971 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 862 transitions. [2022-07-22 00:40:15,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 00:40:15,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:15,972 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:15,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:16,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:16,190 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:16,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:16,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1583952330, now seen corresponding path program 1 times [2022-07-22 00:40:16,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:16,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074765051] [2022-07-22 00:40:16,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:16,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:16,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:16,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 00:40:16,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:16,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074765051] [2022-07-22 00:40:16,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074765051] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:16,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155096217] [2022-07-22 00:40:16,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:16,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:16,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:16,256 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:16,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 00:40:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:16,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 00:40:16,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 00:40:16,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 00:40:16,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155096217] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:16,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 00:40:16,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2022-07-22 00:40:16,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856631027] [2022-07-22 00:40:16,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:40:16,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 00:40:16,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:16,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 00:40:16,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-22 00:40:16,412 INFO L87 Difference]: Start difference. First operand 701 states and 862 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 00:40:16,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:16,562 INFO L93 Difference]: Finished difference Result 776 states and 987 transitions. [2022-07-22 00:40:16,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 00:40:16,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-07-22 00:40:16,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:16,566 INFO L225 Difference]: With dead ends: 776 [2022-07-22 00:40:16,566 INFO L226 Difference]: Without dead ends: 775 [2022-07-22 00:40:16,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-07-22 00:40:16,567 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 65 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:16,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 101 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:40:16,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-07-22 00:40:16,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 722. [2022-07-22 00:40:16,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 568 states have (on average 1.1971830985915493) internal successors, (680), 589 states have internal predecessors, (680), 102 states have call successors, (102), 47 states have call predecessors, (102), 46 states have return successors, (106), 85 states have call predecessors, (106), 78 states have call successors, (106) [2022-07-22 00:40:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 888 transitions. [2022-07-22 00:40:16,605 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 888 transitions. Word has length 28 [2022-07-22 00:40:16,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:16,606 INFO L495 AbstractCegarLoop]: Abstraction has 722 states and 888 transitions. [2022-07-22 00:40:16,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 00:40:16,606 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 888 transitions. [2022-07-22 00:40:16,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 00:40:16,607 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:16,607 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-07-22 00:40:16,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:16,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 00:40:16,823 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:16,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:16,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1777813581, now seen corresponding path program 1 times [2022-07-22 00:40:16,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:16,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055470927] [2022-07-22 00:40:16,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:16,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:16,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:16,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:16,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:16,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055470927] [2022-07-22 00:40:16,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055470927] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:16,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078583792] [2022-07-22 00:40:16,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:16,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:16,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:16,932 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:16,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 00:40:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:16,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 00:40:16,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:17,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:17,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078583792] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:17,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:17,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-07-22 00:40:17,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23032103] [2022-07-22 00:40:17,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:17,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 00:40:17,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:17,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 00:40:17,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-22 00:40:17,175 INFO L87 Difference]: Start difference. First operand 722 states and 888 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 00:40:17,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:17,576 INFO L93 Difference]: Finished difference Result 1150 states and 1701 transitions. [2022-07-22 00:40:17,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 00:40:17,576 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-07-22 00:40:17,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:17,581 INFO L225 Difference]: With dead ends: 1150 [2022-07-22 00:40:17,581 INFO L226 Difference]: Without dead ends: 1148 [2022-07-22 00:40:17,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2022-07-22 00:40:17,582 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 147 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:17,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 209 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:40:17,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-07-22 00:40:17,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 976. [2022-07-22 00:40:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 736 states have (on average 1.1875) internal successors, (874), 768 states have internal predecessors, (874), 151 states have call successors, (151), 54 states have call predecessors, (151), 83 states have return successors, (294), 153 states have call predecessors, (294), 126 states have call successors, (294) [2022-07-22 00:40:17,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1319 transitions. [2022-07-22 00:40:17,638 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1319 transitions. Word has length 33 [2022-07-22 00:40:17,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:17,638 INFO L495 AbstractCegarLoop]: Abstraction has 976 states and 1319 transitions. [2022-07-22 00:40:17,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 00:40:17,638 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1319 transitions. [2022-07-22 00:40:17,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-22 00:40:17,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:17,639 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 00:40:17,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:17,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:17,856 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:17,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:17,856 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2022-07-22 00:40:17,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:17,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101821846] [2022-07-22 00:40:17,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:17,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:17,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:17,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:17,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:17,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101821846] [2022-07-22 00:40:17,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101821846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:17,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898841081] [2022-07-22 00:40:17,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:17,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:17,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:17,917 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:17,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 00:40:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:17,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 00:40:17,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:17,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:18,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898841081] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:18,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 00:40:18,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2022-07-22 00:40:18,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641532779] [2022-07-22 00:40:18,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:40:18,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 00:40:18,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:18,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 00:40:18,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-07-22 00:40:18,123 INFO L87 Difference]: Start difference. First operand 976 states and 1319 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 00:40:18,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:18,304 INFO L93 Difference]: Finished difference Result 1019 states and 1361 transitions. [2022-07-22 00:40:18,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 00:40:18,305 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2022-07-22 00:40:18,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:18,308 INFO L225 Difference]: With dead ends: 1019 [2022-07-22 00:40:18,309 INFO L226 Difference]: Without dead ends: 1018 [2022-07-22 00:40:18,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-07-22 00:40:18,310 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 62 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:18,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 127 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:40:18,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-07-22 00:40:18,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 975. [2022-07-22 00:40:18,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 736 states have (on average 1.1766304347826086) internal successors, (866), 767 states have internal predecessors, (866), 151 states have call successors, (151), 54 states have call predecessors, (151), 83 states have return successors, (294), 153 states have call predecessors, (294), 126 states have call successors, (294) [2022-07-22 00:40:18,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1311 transitions. [2022-07-22 00:40:18,354 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1311 transitions. Word has length 34 [2022-07-22 00:40:18,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:18,354 INFO L495 AbstractCegarLoop]: Abstraction has 975 states and 1311 transitions. [2022-07-22 00:40:18,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 00:40:18,355 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1311 transitions. [2022-07-22 00:40:18,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 00:40:18,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:18,355 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:18,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:18,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:18,569 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:18,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:18,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1227703372, now seen corresponding path program 2 times [2022-07-22 00:40:18,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:18,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690876307] [2022-07-22 00:40:18,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:18,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:18,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 00:40:18,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:18,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690876307] [2022-07-22 00:40:18,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690876307] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:18,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441001356] [2022-07-22 00:40:18,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 00:40:18,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:18,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:18,642 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:18,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 00:40:18,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 00:40:18,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:40:18,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 00:40:18,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 00:40:18,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 00:40:18,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441001356] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:18,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:18,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 00:40:18,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555894333] [2022-07-22 00:40:18,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:18,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 00:40:18,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:18,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 00:40:18,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-22 00:40:18,804 INFO L87 Difference]: Start difference. First operand 975 states and 1311 transitions. Second operand has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 00:40:19,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:19,090 INFO L93 Difference]: Finished difference Result 1182 states and 1575 transitions. [2022-07-22 00:40:19,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 00:40:19,091 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-07-22 00:40:19,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:19,095 INFO L225 Difference]: With dead ends: 1182 [2022-07-22 00:40:19,095 INFO L226 Difference]: Without dead ends: 1181 [2022-07-22 00:40:19,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=754, Unknown=0, NotChecked=0, Total=992 [2022-07-22 00:40:19,097 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 210 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:19,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 176 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:40:19,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-07-22 00:40:19,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1029. [2022-07-22 00:40:19,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 779 states have (on average 1.177150192554557) internal successors, (917), 806 states have internal predecessors, (917), 162 states have call successors, (162), 61 states have call predecessors, (162), 83 states have return successors, (294), 161 states have call predecessors, (294), 126 states have call successors, (294) [2022-07-22 00:40:19,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1373 transitions. [2022-07-22 00:40:19,149 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1373 transitions. Word has length 36 [2022-07-22 00:40:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:19,149 INFO L495 AbstractCegarLoop]: Abstraction has 1029 states and 1373 transitions. [2022-07-22 00:40:19,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 00:40:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1373 transitions. [2022-07-22 00:40:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 00:40:19,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:19,150 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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] [2022-07-22 00:40:19,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:19,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 00:40:19,368 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:19,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:19,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1699542727, now seen corresponding path program 1 times [2022-07-22 00:40:19,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:19,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886715459] [2022-07-22 00:40:19,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:19,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:19,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:19,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:19,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:19,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886715459] [2022-07-22 00:40:19,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886715459] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:19,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120885933] [2022-07-22 00:40:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:19,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:19,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:19,451 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:19,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 00:40:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:19,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 00:40:19,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:19,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:19,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120885933] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:19,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 00:40:19,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2022-07-22 00:40:19,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773829927] [2022-07-22 00:40:19,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:40:19,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 00:40:19,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:19,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 00:40:19,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-07-22 00:40:19,646 INFO L87 Difference]: Start difference. First operand 1029 states and 1373 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 00:40:19,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:19,843 INFO L93 Difference]: Finished difference Result 1140 states and 1577 transitions. [2022-07-22 00:40:19,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 00:40:19,844 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-07-22 00:40:19,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:19,848 INFO L225 Difference]: With dead ends: 1140 [2022-07-22 00:40:19,848 INFO L226 Difference]: Without dead ends: 1139 [2022-07-22 00:40:19,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-07-22 00:40:19,849 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 65 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:19,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 159 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:40:19,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-07-22 00:40:19,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1037. [2022-07-22 00:40:19,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 787 states have (on average 1.1715374841168995) internal successors, (922), 810 states have internal predecessors, (922), 166 states have call successors, (166), 61 states have call predecessors, (166), 79 states have return successors, (234), 165 states have call predecessors, (234), 130 states have call successors, (234) [2022-07-22 00:40:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1322 transitions. [2022-07-22 00:40:19,912 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1322 transitions. Word has length 37 [2022-07-22 00:40:19,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:19,913 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 1322 transitions. [2022-07-22 00:40:19,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 00:40:19,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1322 transitions. [2022-07-22 00:40:19,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 00:40:19,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:19,914 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:19,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:20,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 00:40:20,131 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:20,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:20,131 INFO L85 PathProgramCache]: Analyzing trace with hash -151680771, now seen corresponding path program 2 times [2022-07-22 00:40:20,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:20,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586543633] [2022-07-22 00:40:20,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:20,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:20,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:20,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586543633] [2022-07-22 00:40:20,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586543633] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:20,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213928415] [2022-07-22 00:40:20,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 00:40:20,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:20,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:20,209 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:20,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 00:40:20,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 00:40:20,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:40:20,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 00:40:20,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:20,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:20,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213928415] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:20,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:20,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-07-22 00:40:20,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403362363] [2022-07-22 00:40:20,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:20,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 00:40:20,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:20,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 00:40:20,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-07-22 00:40:20,429 INFO L87 Difference]: Start difference. First operand 1037 states and 1322 transitions. Second operand has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:20,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:20,953 INFO L93 Difference]: Finished difference Result 2055 states and 2762 transitions. [2022-07-22 00:40:20,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-22 00:40:20,954 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-22 00:40:20,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:20,961 INFO L225 Difference]: With dead ends: 2055 [2022-07-22 00:40:20,961 INFO L226 Difference]: Without dead ends: 2054 [2022-07-22 00:40:20,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 00:40:20,962 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 418 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:20,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 513 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 00:40:20,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2022-07-22 00:40:21,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1759. [2022-07-22 00:40:21,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1326 states have (on average 1.1463046757164403) internal successors, (1520), 1378 states have internal predecessors, (1520), 274 states have call successors, (274), 95 states have call predecessors, (274), 154 states have return successors, (409), 285 states have call predecessors, (409), 226 states have call successors, (409) [2022-07-22 00:40:21,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 2203 transitions. [2022-07-22 00:40:21,060 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 2203 transitions. Word has length 44 [2022-07-22 00:40:21,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:21,061 INFO L495 AbstractCegarLoop]: Abstraction has 1759 states and 2203 transitions. [2022-07-22 00:40:21,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:21,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 2203 transitions. [2022-07-22 00:40:21,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 00:40:21,063 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:21,063 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:21,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:21,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 00:40:21,295 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:21,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:21,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1560392739, now seen corresponding path program 2 times [2022-07-22 00:40:21,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:21,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732939934] [2022-07-22 00:40:21,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:21,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:21,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:21,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:21,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:21,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732939934] [2022-07-22 00:40:21,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732939934] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:21,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113006832] [2022-07-22 00:40:21,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 00:40:21,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:21,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:21,376 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:21,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 00:40:21,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 00:40:21,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:40:21,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 00:40:21,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:21,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:21,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113006832] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:21,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:21,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-07-22 00:40:21,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041648258] [2022-07-22 00:40:21,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:21,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 00:40:21,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:21,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 00:40:21,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-07-22 00:40:21,628 INFO L87 Difference]: Start difference. First operand 1759 states and 2203 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 00:40:22,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:22,595 INFO L93 Difference]: Finished difference Result 3798 states and 5493 transitions. [2022-07-22 00:40:22,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-22 00:40:22,595 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 45 [2022-07-22 00:40:22,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:22,605 INFO L225 Difference]: With dead ends: 3798 [2022-07-22 00:40:22,605 INFO L226 Difference]: Without dead ends: 2636 [2022-07-22 00:40:22,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 00:40:22,612 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 229 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:22,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 315 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 00:40:22,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2022-07-22 00:40:22,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 1939. [2022-07-22 00:40:22,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1464 states have (on average 1.1400273224043715) internal successors, (1669), 1522 states have internal predecessors, (1669), 298 states have call successors, (298), 109 states have call predecessors, (298), 172 states have return successors, (443), 307 states have call predecessors, (443), 245 states have call successors, (443) [2022-07-22 00:40:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 2410 transitions. [2022-07-22 00:40:22,722 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 2410 transitions. Word has length 45 [2022-07-22 00:40:22,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:22,722 INFO L495 AbstractCegarLoop]: Abstraction has 1939 states and 2410 transitions. [2022-07-22 00:40:22,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 00:40:22,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 2410 transitions. [2022-07-22 00:40:22,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 00:40:22,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:22,724 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:22,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:22,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 00:40:22,941 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:22,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:22,941 INFO L85 PathProgramCache]: Analyzing trace with hash -242379077, now seen corresponding path program 1 times [2022-07-22 00:40:22,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:22,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388722778] [2022-07-22 00:40:22,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:22,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:22,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 00:40:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 00:40:22,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:22,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388722778] [2022-07-22 00:40:22,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388722778] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:22,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790169612] [2022-07-22 00:40:22,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:22,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:22,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:22,995 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:23,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 00:40:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:23,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 00:40:23,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 00:40:23,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 00:40:23,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790169612] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:23,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:23,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-07-22 00:40:23,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043864930] [2022-07-22 00:40:23,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:23,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 00:40:23,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:23,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 00:40:23,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-07-22 00:40:23,157 INFO L87 Difference]: Start difference. First operand 1939 states and 2410 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 00:40:23,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:23,709 INFO L93 Difference]: Finished difference Result 2482 states and 3263 transitions. [2022-07-22 00:40:23,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 00:40:23,710 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-07-22 00:40:23,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:23,717 INFO L225 Difference]: With dead ends: 2482 [2022-07-22 00:40:23,717 INFO L226 Difference]: Without dead ends: 2379 [2022-07-22 00:40:23,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 00:40:23,718 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 189 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:23,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 80 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:40:23,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2022-07-22 00:40:23,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 1873. [2022-07-22 00:40:23,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1411 states have (on average 1.133238837703756) internal successors, (1599), 1473 states have internal predecessors, (1599), 286 states have call successors, (286), 102 states have call predecessors, (286), 172 states have return successors, (443), 297 states have call predecessors, (443), 245 states have call successors, (443) [2022-07-22 00:40:23,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 2328 transitions. [2022-07-22 00:40:23,825 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 2328 transitions. Word has length 52 [2022-07-22 00:40:23,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:23,825 INFO L495 AbstractCegarLoop]: Abstraction has 1873 states and 2328 transitions. [2022-07-22 00:40:23,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 00:40:23,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 2328 transitions. [2022-07-22 00:40:23,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 00:40:23,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:23,827 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:23,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:24,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 00:40:24,043 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:24,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:24,044 INFO L85 PathProgramCache]: Analyzing trace with hash 442862615, now seen corresponding path program 1 times [2022-07-22 00:40:24,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:24,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993466850] [2022-07-22 00:40:24,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:24,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:24,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:24,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:40:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:24,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:24,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 00:40:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:24,155 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 00:40:24,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:24,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993466850] [2022-07-22 00:40:24,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993466850] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:24,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022333873] [2022-07-22 00:40:24,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:24,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:24,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:24,172 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:24,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 00:40:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:24,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 00:40:24,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-22 00:40:24,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 00:40:24,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022333873] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:24,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:24,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-07-22 00:40:24,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441013811] [2022-07-22 00:40:24,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:24,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 00:40:24,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:24,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 00:40:24,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-07-22 00:40:24,594 INFO L87 Difference]: Start difference. First operand 1873 states and 2328 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-22 00:40:25,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:25,821 INFO L93 Difference]: Finished difference Result 4363 states and 7674 transitions. [2022-07-22 00:40:25,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-22 00:40:25,831 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 52 [2022-07-22 00:40:25,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:25,852 INFO L225 Difference]: With dead ends: 4363 [2022-07-22 00:40:25,852 INFO L226 Difference]: Without dead ends: 4361 [2022-07-22 00:40:25,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2022-07-22 00:40:25,855 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 171 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:25,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 219 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 00:40:25,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2022-07-22 00:40:26,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 3183. [2022-07-22 00:40:26,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3183 states, 2230 states have (on average 1.1031390134529149) internal successors, (2460), 2295 states have internal predecessors, (2460), 551 states have call successors, (551), 116 states have call predecessors, (551), 398 states have return successors, (3128), 771 states have call predecessors, (3128), 508 states have call successors, (3128) [2022-07-22 00:40:26,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 6139 transitions. [2022-07-22 00:40:26,095 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 6139 transitions. Word has length 52 [2022-07-22 00:40:26,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:26,095 INFO L495 AbstractCegarLoop]: Abstraction has 3183 states and 6139 transitions. [2022-07-22 00:40:26,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-22 00:40:26,095 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 6139 transitions. [2022-07-22 00:40:26,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 00:40:26,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:26,097 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:26,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-22 00:40:26,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:26,330 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:26,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:26,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1812635000, now seen corresponding path program 3 times [2022-07-22 00:40:26,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:26,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308706672] [2022-07-22 00:40:26,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:26,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:26,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 00:40:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 75 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 00:40:26,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:26,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308706672] [2022-07-22 00:40:26,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308706672] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:26,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997342142] [2022-07-22 00:40:26,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 00:40:26,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:26,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:26,428 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:26,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 00:40:26,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-22 00:40:26,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:40:26,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 00:40:26,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 75 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 00:40:26,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:26,714 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 00:40:26,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997342142] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:26,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:26,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-07-22 00:40:26,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754460892] [2022-07-22 00:40:26,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:26,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 00:40:26,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:26,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 00:40:26,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-07-22 00:40:26,716 INFO L87 Difference]: Start difference. First operand 3183 states and 6139 transitions. Second operand has 27 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 19 states have internal predecessors, (77), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 00:40:27,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:27,323 INFO L93 Difference]: Finished difference Result 3643 states and 6775 transitions. [2022-07-22 00:40:27,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 00:40:27,323 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 19 states have internal predecessors, (77), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-07-22 00:40:27,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:27,340 INFO L225 Difference]: With dead ends: 3643 [2022-07-22 00:40:27,340 INFO L226 Difference]: Without dead ends: 3642 [2022-07-22 00:40:27,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=634, Invalid=1916, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 00:40:27,342 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 398 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:27,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 196 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:40:27,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3642 states. [2022-07-22 00:40:27,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3642 to 3211. [2022-07-22 00:40:27,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3211 states, 2253 states have (on average 1.1034176653351087) internal successors, (2486), 2318 states have internal predecessors, (2486), 556 states have call successors, (556), 119 states have call predecessors, (556), 398 states have return successors, (3128), 773 states have call predecessors, (3128), 508 states have call successors, (3128) [2022-07-22 00:40:27,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3211 states to 3211 states and 6170 transitions. [2022-07-22 00:40:27,577 INFO L78 Accepts]: Start accepts. Automaton has 3211 states and 6170 transitions. Word has length 52 [2022-07-22 00:40:27,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:27,577 INFO L495 AbstractCegarLoop]: Abstraction has 3211 states and 6170 transitions. [2022-07-22 00:40:27,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 19 states have internal predecessors, (77), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 00:40:27,578 INFO L276 IsEmpty]: Start isEmpty. Operand 3211 states and 6170 transitions. [2022-07-22 00:40:27,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-22 00:40:27,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:27,580 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:27,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:27,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:27,791 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:27,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:27,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1991697283, now seen corresponding path program 1 times [2022-07-22 00:40:27,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:27,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110428816] [2022-07-22 00:40:27,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:27,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 00:40:27,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:27,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110428816] [2022-07-22 00:40:27,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110428816] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:27,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238514875] [2022-07-22 00:40:27,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:27,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:27,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:27,865 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:27,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 00:40:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:27,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 00:40:27,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 00:40:27,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 00:40:28,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238514875] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:28,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:28,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-07-22 00:40:28,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614859600] [2022-07-22 00:40:28,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:28,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 00:40:28,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:28,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 00:40:28,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-07-22 00:40:28,108 INFO L87 Difference]: Start difference. First operand 3211 states and 6170 transitions. Second operand has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:29,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:29,126 INFO L93 Difference]: Finished difference Result 9377 states and 17636 transitions. [2022-07-22 00:40:29,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-22 00:40:29,127 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-22 00:40:29,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:29,210 INFO L225 Difference]: With dead ends: 9377 [2022-07-22 00:40:29,210 INFO L226 Difference]: Without dead ends: 9376 [2022-07-22 00:40:29,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 00:40:29,214 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 676 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:29,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 314 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 00:40:29,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9376 states. [2022-07-22 00:40:29,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9376 to 8659. [2022-07-22 00:40:29,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8659 states, 6117 states have (on average 1.1057708026810529) internal successors, (6764), 6272 states have internal predecessors, (6764), 1498 states have call successors, (1498), 347 states have call predecessors, (1498), 1040 states have return successors, (8216), 2039 states have call predecessors, (8216), 1330 states have call successors, (8216) [2022-07-22 00:40:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8659 states to 8659 states and 16478 transitions. [2022-07-22 00:40:29,858 INFO L78 Accepts]: Start accepts. Automaton has 8659 states and 16478 transitions. Word has length 58 [2022-07-22 00:40:29,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:29,858 INFO L495 AbstractCegarLoop]: Abstraction has 8659 states and 16478 transitions. [2022-07-22 00:40:29,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:29,858 INFO L276 IsEmpty]: Start isEmpty. Operand 8659 states and 16478 transitions. [2022-07-22 00:40:29,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-22 00:40:29,860 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:29,860 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:29,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:30,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:30,075 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:30,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:30,076 INFO L85 PathProgramCache]: Analyzing trace with hash 526800899, now seen corresponding path program 1 times [2022-07-22 00:40:30,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:30,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352526997] [2022-07-22 00:40:30,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:30,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:30,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:30,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:40:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:30,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:30,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 00:40:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 00:40:30,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:30,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352526997] [2022-07-22 00:40:30,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352526997] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:30,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111715141] [2022-07-22 00:40:30,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:30,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:30,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:30,217 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:30,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 00:40:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:30,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 00:40:30,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-22 00:40:30,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 00:40:30,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111715141] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:30,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:30,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-07-22 00:40:30,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943713853] [2022-07-22 00:40:30,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:30,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 00:40:30,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:30,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 00:40:30,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-07-22 00:40:30,655 INFO L87 Difference]: Start difference. First operand 8659 states and 16478 transitions. Second operand has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-22 00:40:32,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:32,956 INFO L93 Difference]: Finished difference Result 30203 states and 100302 transitions. [2022-07-22 00:40:32,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-22 00:40:32,957 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-07-22 00:40:32,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:33,202 INFO L225 Difference]: With dead ends: 30203 [2022-07-22 00:40:33,202 INFO L226 Difference]: Without dead ends: 22210 [2022-07-22 00:40:33,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=906, Invalid=3516, Unknown=0, NotChecked=0, Total=4422 [2022-07-22 00:40:33,324 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 129 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:33,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 354 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 00:40:33,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22210 states. [2022-07-22 00:40:35,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22210 to 17565. [2022-07-22 00:40:35,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17565 states, 11675 states have (on average 1.0707494646680942) internal successors, (12501), 11802 states have internal predecessors, (12501), 3307 states have call successors, (3307), 438 states have call predecessors, (3307), 2579 states have return successors, (43949), 5324 states have call predecessors, (43949), 3113 states have call successors, (43949) [2022-07-22 00:40:35,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17565 states to 17565 states and 59757 transitions. [2022-07-22 00:40:35,559 INFO L78 Accepts]: Start accepts. Automaton has 17565 states and 59757 transitions. Word has length 56 [2022-07-22 00:40:35,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:35,560 INFO L495 AbstractCegarLoop]: Abstraction has 17565 states and 59757 transitions. [2022-07-22 00:40:35,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-22 00:40:35,560 INFO L276 IsEmpty]: Start isEmpty. Operand 17565 states and 59757 transitions. [2022-07-22 00:40:35,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-22 00:40:35,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:35,563 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:35,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:35,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-22 00:40:35,779 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:35,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:35,780 INFO L85 PathProgramCache]: Analyzing trace with hash 55857866, now seen corresponding path program 2 times [2022-07-22 00:40:35,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:35,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372273107] [2022-07-22 00:40:35,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:35,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:35,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:35,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:35,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:40:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:35,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:35,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 00:40:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:35,924 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-22 00:40:35,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:35,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372273107] [2022-07-22 00:40:35,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372273107] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:35,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047367436] [2022-07-22 00:40:35,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 00:40:35,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:35,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:35,926 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:35,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 00:40:35,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 00:40:35,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:40:35,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 00:40:35,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 23 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-22 00:40:36,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 80 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-22 00:40:36,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047367436] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:36,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:36,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2022-07-22 00:40:36,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166939032] [2022-07-22 00:40:36,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:36,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 00:40:36,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:36,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 00:40:36,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 00:40:36,637 INFO L87 Difference]: Start difference. First operand 17565 states and 59757 transitions. Second operand has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-22 00:40:38,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:38,652 INFO L93 Difference]: Finished difference Result 29426 states and 97217 transitions. [2022-07-22 00:40:38,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 00:40:38,653 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 73 [2022-07-22 00:40:38,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:38,697 INFO L225 Difference]: With dead ends: 29426 [2022-07-22 00:40:38,698 INFO L226 Difference]: Without dead ends: 12522 [2022-07-22 00:40:38,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2022-07-22 00:40:38,839 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 133 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:38,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 386 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 00:40:38,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12522 states. [2022-07-22 00:40:39,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12522 to 11029. [2022-07-22 00:40:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11029 states, 7807 states have (on average 1.1115665428461636) internal successors, (8678), 8110 states have internal predecessors, (8678), 1942 states have call successors, (1942), 487 states have call predecessors, (1942), 1276 states have return successors, (5975), 2431 states have call predecessors, (5975), 1723 states have call successors, (5975) [2022-07-22 00:40:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11029 states to 11029 states and 16595 transitions. [2022-07-22 00:40:39,879 INFO L78 Accepts]: Start accepts. Automaton has 11029 states and 16595 transitions. Word has length 73 [2022-07-22 00:40:39,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:39,879 INFO L495 AbstractCegarLoop]: Abstraction has 11029 states and 16595 transitions. [2022-07-22 00:40:39,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-22 00:40:39,880 INFO L276 IsEmpty]: Start isEmpty. Operand 11029 states and 16595 transitions. [2022-07-22 00:40:39,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-22 00:40:39,883 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:39,883 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:39,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:40,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:40,100 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:40,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:40,100 INFO L85 PathProgramCache]: Analyzing trace with hash 821485916, now seen corresponding path program 4 times [2022-07-22 00:40:40,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:40,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901668819] [2022-07-22 00:40:40,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:40,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:40,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 00:40:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 00:40:40,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:40,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901668819] [2022-07-22 00:40:40,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901668819] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:40,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528557918] [2022-07-22 00:40:40,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 00:40:40,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:40,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:40,223 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:40,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 00:40:40,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 00:40:40,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:40:40,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 00:40:40,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 106 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-22 00:40:40,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 106 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-22 00:40:40,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528557918] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:40,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:40,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 23 [2022-07-22 00:40:40,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209519101] [2022-07-22 00:40:40,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:40,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 00:40:40,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:40,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 00:40:40,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-07-22 00:40:40,426 INFO L87 Difference]: Start difference. First operand 11029 states and 16595 transitions. Second operand has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 16 states have internal predecessors, (78), 10 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 00:40:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:41,295 INFO L93 Difference]: Finished difference Result 11563 states and 17375 transitions. [2022-07-22 00:40:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 00:40:41,295 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 16 states have internal predecessors, (78), 10 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-07-22 00:40:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:41,334 INFO L225 Difference]: With dead ends: 11563 [2022-07-22 00:40:41,338 INFO L226 Difference]: Without dead ends: 9324 [2022-07-22 00:40:41,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=374, Invalid=1348, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 00:40:41,348 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 313 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:41,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 100 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:40:41,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9324 states. [2022-07-22 00:40:41,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9324 to 8758. [2022-07-22 00:40:41,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8758 states, 5964 states have (on average 1.0675720992622402) internal successors, (6367), 6090 states have internal predecessors, (6367), 1731 states have call successors, (1731), 316 states have call predecessors, (1731), 1059 states have return successors, (5687), 2351 states have call predecessors, (5687), 1723 states have call successors, (5687) [2022-07-22 00:40:41,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8758 states to 8758 states and 13785 transitions. [2022-07-22 00:40:41,937 INFO L78 Accepts]: Start accepts. Automaton has 8758 states and 13785 transitions. Word has length 68 [2022-07-22 00:40:41,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:41,937 INFO L495 AbstractCegarLoop]: Abstraction has 8758 states and 13785 transitions. [2022-07-22 00:40:41,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 16 states have internal predecessors, (78), 10 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 00:40:41,937 INFO L276 IsEmpty]: Start isEmpty. Operand 8758 states and 13785 transitions. [2022-07-22 00:40:41,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 00:40:41,939 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:41,939 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:41,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:42,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:42,143 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:42,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:42,143 INFO L85 PathProgramCache]: Analyzing trace with hash -131434271, now seen corresponding path program 3 times [2022-07-22 00:40:42,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:42,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152067554] [2022-07-22 00:40:42,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:42,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:42,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:42,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:42,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:42,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152067554] [2022-07-22 00:40:42,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152067554] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:42,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912901821] [2022-07-22 00:40:42,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 00:40:42,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:42,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:42,300 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:42,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 00:40:42,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-22 00:40:42,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:40:42,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 00:40:42,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:42,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 65 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:42,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912901821] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:42,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:42,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-07-22 00:40:42,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264704458] [2022-07-22 00:40:42,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:42,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 00:40:42,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:42,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 00:40:42,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 00:40:42,735 INFO L87 Difference]: Start difference. First operand 8758 states and 13785 transitions. Second operand has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 00:40:43,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:43,568 INFO L93 Difference]: Finished difference Result 9409 states and 14783 transitions. [2022-07-22 00:40:43,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 00:40:43,578 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2022-07-22 00:40:43,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:43,603 INFO L225 Difference]: With dead ends: 9409 [2022-07-22 00:40:43,603 INFO L226 Difference]: Without dead ends: 9408 [2022-07-22 00:40:43,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 00:40:43,608 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 332 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:43,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 236 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:40:43,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9408 states. [2022-07-22 00:40:44,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9408 to 8866. [2022-07-22 00:40:44,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8866 states, 6036 states have (on average 1.0637839628893306) internal successors, (6421), 6162 states have internal predecessors, (6421), 1731 states have call successors, (1731), 316 states have call predecessors, (1731), 1095 states have return successors, (5781), 2387 states have call predecessors, (5781), 1723 states have call successors, (5781) [2022-07-22 00:40:44,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8866 states to 8866 states and 13933 transitions. [2022-07-22 00:40:44,373 INFO L78 Accepts]: Start accepts. Automaton has 8866 states and 13933 transitions. Word has length 69 [2022-07-22 00:40:44,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:44,374 INFO L495 AbstractCegarLoop]: Abstraction has 8866 states and 13933 transitions. [2022-07-22 00:40:44,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 00:40:44,374 INFO L276 IsEmpty]: Start isEmpty. Operand 8866 states and 13933 transitions. [2022-07-22 00:40:44,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-22 00:40:44,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:44,377 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:44,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:44,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:44,593 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:44,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:44,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1324062136, now seen corresponding path program 2 times [2022-07-22 00:40:44,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:44,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153741744] [2022-07-22 00:40:44,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:44,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:44,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:44,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:44,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:40:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:44,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:40:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:44,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:44,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 00:40:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:44,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 00:40:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 82 proven. 24 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-22 00:40:44,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:44,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153741744] [2022-07-22 00:40:44,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153741744] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:44,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296801916] [2022-07-22 00:40:44,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 00:40:44,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:44,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:44,667 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:44,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 00:40:44,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 00:40:44,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:40:44,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 00:40:44,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 82 proven. 15 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-22 00:40:44,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 82 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-22 00:40:45,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296801916] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:45,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:45,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2022-07-22 00:40:45,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572722048] [2022-07-22 00:40:45,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:45,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 00:40:45,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:45,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 00:40:45,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-07-22 00:40:45,012 INFO L87 Difference]: Start difference. First operand 8866 states and 13933 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-22 00:40:45,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:45,577 INFO L93 Difference]: Finished difference Result 17989 states and 31874 transitions. [2022-07-22 00:40:45,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 00:40:45,579 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 80 [2022-07-22 00:40:45,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:45,646 INFO L225 Difference]: With dead ends: 17989 [2022-07-22 00:40:45,647 INFO L226 Difference]: Without dead ends: 9810 [2022-07-22 00:40:45,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2022-07-22 00:40:45,680 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 61 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:45,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 84 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:40:45,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2022-07-22 00:40:46,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 8860. [2022-07-22 00:40:46,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8860 states, 6033 states have (on average 1.0638156804243328) internal successors, (6418), 6159 states have internal predecessors, (6418), 1728 states have call successors, (1728), 316 states have call predecessors, (1728), 1095 states have return successors, (5701), 2384 states have call predecessors, (5701), 1693 states have call successors, (5701) [2022-07-22 00:40:46,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8860 states to 8860 states and 13847 transitions. [2022-07-22 00:40:46,443 INFO L78 Accepts]: Start accepts. Automaton has 8860 states and 13847 transitions. Word has length 80 [2022-07-22 00:40:46,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:46,444 INFO L495 AbstractCegarLoop]: Abstraction has 8860 states and 13847 transitions. [2022-07-22 00:40:46,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-22 00:40:46,444 INFO L276 IsEmpty]: Start isEmpty. Operand 8860 states and 13847 transitions. [2022-07-22 00:40:46,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-22 00:40:46,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:46,448 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:46,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:46,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-22 00:40:46,662 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:46,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:46,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1897499616, now seen corresponding path program 3 times [2022-07-22 00:40:46,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:46,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765169699] [2022-07-22 00:40:46,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:46,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:46,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:46,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:40:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:46,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:40:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:46,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:46,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:40:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:46,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:46,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 00:40:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:46,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-22 00:40:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:46,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 00:40:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 113 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-22 00:40:46,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:46,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765169699] [2022-07-22 00:40:46,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765169699] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:46,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072759281] [2022-07-22 00:40:46,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 00:40:46,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:46,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:46,800 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:46,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 00:40:46,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-22 00:40:46,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:40:46,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 00:40:46,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 150 proven. 26 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-22 00:40:46,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 119 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-22 00:40:47,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072759281] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:47,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:47,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2022-07-22 00:40:47,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94557572] [2022-07-22 00:40:47,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:47,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 00:40:47,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:47,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 00:40:47,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-07-22 00:40:47,500 INFO L87 Difference]: Start difference. First operand 8860 states and 13847 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2022-07-22 00:40:48,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:48,427 INFO L93 Difference]: Finished difference Result 20507 states and 41561 transitions. [2022-07-22 00:40:48,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 00:40:48,428 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) Word has length 99 [2022-07-22 00:40:48,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:48,491 INFO L225 Difference]: With dead ends: 20507 [2022-07-22 00:40:48,492 INFO L226 Difference]: Without dead ends: 12363 [2022-07-22 00:40:48,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-07-22 00:40:48,550 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 65 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:48,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 163 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:40:48,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12363 states. [2022-07-22 00:40:49,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12363 to 11997. [2022-07-22 00:40:49,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11997 states, 8101 states have (on average 1.054684606838662) internal successors, (8544), 8288 states have internal predecessors, (8544), 2417 states have call successors, (2417), 424 states have call predecessors, (2417), 1475 states have return successors, (8115), 3284 states have call predecessors, (8115), 2362 states have call successors, (8115) [2022-07-22 00:40:49,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11997 states to 11997 states and 19076 transitions. [2022-07-22 00:40:49,679 INFO L78 Accepts]: Start accepts. Automaton has 11997 states and 19076 transitions. Word has length 99 [2022-07-22 00:40:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:49,680 INFO L495 AbstractCegarLoop]: Abstraction has 11997 states and 19076 transitions. [2022-07-22 00:40:49,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2022-07-22 00:40:49,680 INFO L276 IsEmpty]: Start isEmpty. Operand 11997 states and 19076 transitions. [2022-07-22 00:40:49,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-22 00:40:49,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:49,685 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 7, 7, 7, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:49,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:49,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-22 00:40:49,896 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:49,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:49,896 INFO L85 PathProgramCache]: Analyzing trace with hash -127918165, now seen corresponding path program 3 times [2022-07-22 00:40:49,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:49,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467392972] [2022-07-22 00:40:49,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:49,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:49,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:50,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:40:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:50,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:50,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 00:40:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 122 proven. 90 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 00:40:50,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:50,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467392972] [2022-07-22 00:40:50,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467392972] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:50,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051492426] [2022-07-22 00:40:50,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 00:40:50,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:50,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:50,110 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:50,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-22 00:40:50,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-22 00:40:50,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:40:50,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-22 00:40:50,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 119 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-22 00:40:50,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-22 00:40:50,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051492426] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:50,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:50,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2022-07-22 00:40:50,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558284080] [2022-07-22 00:40:50,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:50,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 00:40:50,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:50,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 00:40:50,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-07-22 00:40:50,427 INFO L87 Difference]: Start difference. First operand 11997 states and 19076 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-22 00:40:52,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:52,195 INFO L93 Difference]: Finished difference Result 20852 states and 35642 transitions. [2022-07-22 00:40:52,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-22 00:40:52,196 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 88 [2022-07-22 00:40:52,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:52,236 INFO L225 Difference]: With dead ends: 20852 [2022-07-22 00:40:52,236 INFO L226 Difference]: Without dead ends: 10359 [2022-07-22 00:40:52,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2022-07-22 00:40:52,278 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 171 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:52,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 177 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 00:40:52,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2022-07-22 00:40:52,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 8741. [2022-07-22 00:40:52,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8741 states, 5968 states have (on average 1.0464142091152815) internal successors, (6245), 6144 states have internal predecessors, (6245), 1711 states have call successors, (1711), 352 states have call predecessors, (1711), 1058 states have return successors, (4097), 2244 states have call predecessors, (4097), 1677 states have call successors, (4097) [2022-07-22 00:40:52,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 12053 transitions. [2022-07-22 00:40:52,988 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 12053 transitions. Word has length 88 [2022-07-22 00:40:52,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:52,989 INFO L495 AbstractCegarLoop]: Abstraction has 8741 states and 12053 transitions. [2022-07-22 00:40:52,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-22 00:40:52,989 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 12053 transitions. [2022-07-22 00:40:52,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-22 00:40:52,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:52,992 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:53,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:53,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-22 00:40:53,208 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:53,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:53,209 INFO L85 PathProgramCache]: Analyzing trace with hash -635779733, now seen corresponding path program 4 times [2022-07-22 00:40:53,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:53,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308701450] [2022-07-22 00:40:53,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:53,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:53,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:53,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:40:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:53,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:40:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:53,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:40:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:53,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:53,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 00:40:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:53,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 00:40:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:53,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-22 00:40:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-22 00:40:53,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:53,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308701450] [2022-07-22 00:40:53,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308701450] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:53,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110435907] [2022-07-22 00:40:53,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 00:40:53,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:53,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:53,409 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:53,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-22 00:40:53,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 00:40:53,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:40:53,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 00:40:53,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-22 00:40:53,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 42 proven. 89 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-22 00:40:54,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110435907] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:54,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:54,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2022-07-22 00:40:54,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40575594] [2022-07-22 00:40:54,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:54,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-22 00:40:54,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:54,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-22 00:40:54,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 00:40:54,932 INFO L87 Difference]: Start difference. First operand 8741 states and 12053 transitions. Second operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2022-07-22 00:40:59,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:59,319 INFO L93 Difference]: Finished difference Result 29169 states and 46148 transitions. [2022-07-22 00:40:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-07-22 00:40:59,320 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) Word has length 90 [2022-07-22 00:40:59,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:59,520 INFO L225 Difference]: With dead ends: 29169 [2022-07-22 00:40:59,520 INFO L226 Difference]: Without dead ends: 28067 [2022-07-22 00:40:59,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12105 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2022-07-22 00:40:59,541 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 299 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 1054 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 2727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1054 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:59,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 330 Invalid, 2727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1054 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 00:40:59,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28067 states. [2022-07-22 00:41:00,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28067 to 17311. [2022-07-22 00:41:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17311 states, 11232 states have (on average 1.0269764957264957) internal successors, (11535), 11391 states have internal predecessors, (11535), 3626 states have call successors, (3626), 460 states have call predecessors, (3626), 2449 states have return successors, (11770), 5459 states have call predecessors, (11770), 3572 states have call successors, (11770) [2022-07-22 00:41:00,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17311 states to 17311 states and 26931 transitions. [2022-07-22 00:41:00,948 INFO L78 Accepts]: Start accepts. Automaton has 17311 states and 26931 transitions. Word has length 90 [2022-07-22 00:41:00,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:41:00,948 INFO L495 AbstractCegarLoop]: Abstraction has 17311 states and 26931 transitions. [2022-07-22 00:41:00,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2022-07-22 00:41:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand 17311 states and 26931 transitions. [2022-07-22 00:41:00,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-22 00:41:00,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:41:00,951 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2022-07-22 00:41:00,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-22 00:41:01,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:41:01,168 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:41:01,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:41:01,168 INFO L85 PathProgramCache]: Analyzing trace with hash 147414137, now seen corresponding path program 3 times [2022-07-22 00:41:01,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:41:01,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702523986] [2022-07-22 00:41:01,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:41:01,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:41:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:41:01,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:41:01,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702523986] [2022-07-22 00:41:01,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702523986] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:41:01,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777464444] [2022-07-22 00:41:01,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 00:41:01,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:41:01,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:41:01,376 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:41:01,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-22 00:41:01,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-22 00:41:01,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:41:01,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 00:41:01,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:41:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:41:01,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:41:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:41:02,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777464444] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:41:02,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:41:02,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-07-22 00:41:02,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154091207] [2022-07-22 00:41:02,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:41:02,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-22 00:41:02,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:41:02,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-22 00:41:02,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-07-22 00:41:02,063 INFO L87 Difference]: Start difference. First operand 17311 states and 26931 transitions. Second operand has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:41:04,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:41:04,768 INFO L93 Difference]: Finished difference Result 28628 states and 44547 transitions. [2022-07-22 00:41:04,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-22 00:41:04,768 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-07-22 00:41:04,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:41:04,868 INFO L225 Difference]: With dead ends: 28628 [2022-07-22 00:41:04,869 INFO L226 Difference]: Without dead ends: 28627 [2022-07-22 00:41:04,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2022-07-22 00:41:04,881 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1217 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 695 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 00:41:04,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1221 Valid, 669 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [695 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 00:41:04,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28627 states. [2022-07-22 00:41:06,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28627 to 28627. [2022-07-22 00:41:06,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28627 states, 18540 states have (on average 1.0279935275080907) internal successors, (19059), 18915 states have internal predecessors, (19059), 5846 states have call successors, (5846), 676 states have call predecessors, (5846), 4237 states have return successors, (19630), 9035 states have call predecessors, (19630), 5792 states have call successors, (19630) [2022-07-22 00:41:06,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28627 states to 28627 states and 44535 transitions. [2022-07-22 00:41:06,912 INFO L78 Accepts]: Start accepts. Automaton has 28627 states and 44535 transitions. Word has length 92 [2022-07-22 00:41:06,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:41:06,913 INFO L495 AbstractCegarLoop]: Abstraction has 28627 states and 44535 transitions. [2022-07-22 00:41:06,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:41:06,913 INFO L276 IsEmpty]: Start isEmpty. Operand 28627 states and 44535 transitions. [2022-07-22 00:41:06,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-22 00:41:06,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:41:06,922 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2022-07-22 00:41:06,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-22 00:41:07,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:41:07,138 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:41:07,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:41:07,138 INFO L85 PathProgramCache]: Analyzing trace with hash -570444405, now seen corresponding path program 2 times [2022-07-22 00:41:07,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:41:07,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66551830] [2022-07-22 00:41:07,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:41:07,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:41:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 00:41:07,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:41:07,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66551830] [2022-07-22 00:41:07,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66551830] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:41:07,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581390870] [2022-07-22 00:41:07,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 00:41:07,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:41:07,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:41:07,439 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:41:07,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-22 00:41:07,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 00:41:07,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:41:07,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-22 00:41:07,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:41:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 00:41:07,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:41:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 00:41:08,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581390870] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:41:08,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:41:08,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-07-22 00:41:08,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553375196] [2022-07-22 00:41:08,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:41:08,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-22 00:41:08,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:41:08,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-22 00:41:08,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-07-22 00:41:08,225 INFO L87 Difference]: Start difference. First operand 28627 states and 44535 transitions. Second operand has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:41:13,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:41:13,019 INFO L93 Difference]: Finished difference Result 64728 states and 101341 transitions. [2022-07-22 00:41:13,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-22 00:41:13,019 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2022-07-22 00:41:13,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:41:13,276 INFO L225 Difference]: With dead ends: 64728 [2022-07-22 00:41:13,276 INFO L226 Difference]: Without dead ends: 64727 [2022-07-22 00:41:13,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2022-07-22 00:41:13,308 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2112 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2115 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 1626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 793 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 00:41:13,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2115 Valid, 539 Invalid, 1626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [793 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 00:41:13,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64727 states. [2022-07-22 00:41:18,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64727 to 64675. [2022-07-22 00:41:18,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64675 states, 41976 states have (on average 1.028659233847913) internal successors, (43179), 42843 states have internal predecessors, (43179), 13190 states have call successors, (13190), 1564 states have call predecessors, (13190), 9505 states have return successors, (44950), 20267 states have call predecessors, (44950), 13076 states have call successors, (44950) [2022-07-22 00:41:18,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64675 states to 64675 states and 101319 transitions. [2022-07-22 00:41:18,649 INFO L78 Accepts]: Start accepts. Automaton has 64675 states and 101319 transitions. Word has length 142 [2022-07-22 00:41:18,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:41:18,650 INFO L495 AbstractCegarLoop]: Abstraction has 64675 states and 101319 transitions. [2022-07-22 00:41:18,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:41:18,650 INFO L276 IsEmpty]: Start isEmpty. Operand 64675 states and 101319 transitions. [2022-07-22 00:41:18,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-07-22 00:41:18,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:41:18,666 INFO L195 NwaCegarLoop]: trace histogram [21, 17, 14, 10, 10, 10, 9, 9, 9, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-22 00:41:18,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-22 00:41:18,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-22 00:41:18,880 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:41:18,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:41:18,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1518151305, now seen corresponding path program 1 times [2022-07-22 00:41:18,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:41:18,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468058141] [2022-07-22 00:41:18,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:41:18,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:41:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:18,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 00:41:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:18,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:41:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:18,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:18,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:41:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:18,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:19,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:41:19,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:19,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 00:41:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:19,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-22 00:41:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:19,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:19,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:19,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:19,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:19,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:41:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:19,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 00:41:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:19,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 00:41:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:19,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-22 00:41:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:19,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-22 00:41:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 445 proven. 214 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-22 00:41:19,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:41:19,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468058141] [2022-07-22 00:41:19,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468058141] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:41:19,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269521551] [2022-07-22 00:41:19,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:41:19,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:41:19,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:41:19,172 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:41:19,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-22 00:41:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:19,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 00:41:19,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:41:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 433 proven. 216 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2022-07-22 00:41:19,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:41:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 449 proven. 263 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2022-07-22 00:41:20,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269521551] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:41:20,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:41:20,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 21] total 27 [2022-07-22 00:41:20,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128411945] [2022-07-22 00:41:20,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:41:20,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 00:41:20,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:41:20,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 00:41:20,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-07-22 00:41:20,951 INFO L87 Difference]: Start difference. First operand 64675 states and 101319 transitions. Second operand has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 24 states have internal predecessors, (122), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) [2022-07-22 00:41:27,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:41:27,915 INFO L93 Difference]: Finished difference Result 152847 states and 310280 transitions. [2022-07-22 00:41:27,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 00:41:27,916 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 24 states have internal predecessors, (122), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) Word has length 193 [2022-07-22 00:41:27,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:41:28,600 INFO L225 Difference]: With dead ends: 152847 [2022-07-22 00:41:28,601 INFO L226 Difference]: Without dead ends: 94875 [2022-07-22 00:41:28,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 416 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1557, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 00:41:28,899 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 130 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:41:28,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 285 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:41:28,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94875 states.