./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Ackermann03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b5317dae 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/Ackermann03.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 c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 03:57:52,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 03:57:52,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 03:57:52,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 03:57:52,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 03:57:52,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 03:57:52,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 03:57:52,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 03:57:52,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 03:57:52,471 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 03:57:52,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 03:57:52,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 03:57:52,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 03:57:52,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 03:57:52,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 03:57:52,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 03:57:52,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 03:57:52,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 03:57:52,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 03:57:52,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 03:57:52,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 03:57:52,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 03:57:52,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 03:57:52,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 03:57:52,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 03:57:52,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 03:57:52,487 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 03:57:52,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 03:57:52,488 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 03:57:52,489 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 03:57:52,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 03:57:52,490 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 03:57:52,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 03:57:52,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 03:57:52,491 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 03:57:52,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 03:57:52,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 03:57:52,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 03:57:52,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 03:57:52,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 03:57:52,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 03:57:52,521 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-02-16 03:57:52,560 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 03:57:52,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 03:57:52,560 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 03:57:52,560 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 03:57:52,561 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 03:57:52,561 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 03:57:52,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 03:57:52,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 03:57:52,561 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 03:57:52,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 03:57:52,562 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 03:57:52,562 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-16 03:57:52,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 03:57:52,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 03:57:52,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 03:57:52,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 03:57:52,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 03:57:52,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 03:57:52,563 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-02-16 03:57:52,563 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 03:57:52,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 03:57:52,563 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 03:57:52,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 03:57:52,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 03:57:52,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 03:57:52,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 03:57:52,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:57:52,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 03:57:52,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 03:57:52,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 03:57:52,564 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 03:57:52,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 03:57:52,576 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 03:57:52,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 03:57:52,577 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 03:57:52,577 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 03:57:52,577 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 03:57:52,577 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd [2023-02-16 03:57:52,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 03:57:52,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 03:57:52,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 03:57:52,894 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 03:57:52,894 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 03:57:52,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann03.c [2023-02-16 03:57:53,984 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 03:57:54,123 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 03:57:54,125 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann03.c [2023-02-16 03:57:54,128 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12d694419/b0eaea93ca2548558d47c8d44e24fd23/FLAGc6fb04fd9 [2023-02-16 03:57:54,138 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12d694419/b0eaea93ca2548558d47c8d44e24fd23 [2023-02-16 03:57:54,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 03:57:54,140 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 03:57:54,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 03:57:54,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 03:57:54,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 03:57:54,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72400987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54, skipping insertion in model container [2023-02-16 03:57:54,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 03:57:54,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 03:57:54,291 WARN L237 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/Ackermann03.c[1168,1181] [2023-02-16 03:57:54,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:57:54,299 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 03:57:54,310 WARN L237 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/Ackermann03.c[1168,1181] [2023-02-16 03:57:54,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:57:54,319 INFO L208 MainTranslator]: Completed translation [2023-02-16 03:57:54,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54 WrapperNode [2023-02-16 03:57:54,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 03:57:54,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 03:57:54,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 03:57:54,322 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 03:57:54,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,343 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2023-02-16 03:57:54,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 03:57:54,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 03:57:54,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 03:57:54,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 03:57:54,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,361 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 03:57:54,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 03:57:54,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 03:57:54,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 03:57:54,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:57:54,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:57:54,391 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-16 03:57:54,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-16 03:57:54,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 03:57:54,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 03:57:54,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 03:57:54,415 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2023-02-16 03:57:54,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2023-02-16 03:57:54,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 03:57:54,469 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 03:57:54,471 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 03:57:54,627 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 03:57:54,633 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 03:57:54,648 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-16 03:57:54,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:57:54 BoogieIcfgContainer [2023-02-16 03:57:54,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 03:57:54,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 03:57:54,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 03:57:54,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 03:57:54,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 03:57:54" (1/3) ... [2023-02-16 03:57:54,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@84f1432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:57:54, skipping insertion in model container [2023-02-16 03:57:54,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (2/3) ... [2023-02-16 03:57:54,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@84f1432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:57:54, skipping insertion in model container [2023-02-16 03:57:54,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:57:54" (3/3) ... [2023-02-16 03:57:54,656 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2023-02-16 03:57:54,671 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 03:57:54,672 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-02-16 03:57:54,717 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 03:57:54,738 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@35710dcb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 03:57:54,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-02-16 03:57:54,741 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) [2023-02-16 03:57:54,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-16 03:57:54,746 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:54,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:57:54,747 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:54,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:54,751 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2023-02-16 03:57:54,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:54,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508457754] [2023-02-16 03:57:54,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:54,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:54,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:54,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508457754] [2023-02-16 03:57:54,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508457754] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:57:54,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:57:54,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:57:54,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520045301] [2023-02-16 03:57:54,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:57:54,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:57:54,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:54,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:57:54,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:57:54,920 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) [2023-02-16 03:57:55,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:57:55,054 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2023-02-16 03:57:55,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:57:55,058 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 [2023-02-16 03:57:55,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:57:55,067 INFO L225 Difference]: With dead ends: 73 [2023-02-16 03:57:55,067 INFO L226 Difference]: Without dead ends: 59 [2023-02-16 03:57:55,069 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 [2023-02-16 03:57:55,074 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 55 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:57:55,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 119 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:57:55,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-16 03:57:55,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2023-02-16 03:57:55,121 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) [2023-02-16 03:57:55,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-02-16 03:57:55,127 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2023-02-16 03:57:55,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:57:55,128 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-02-16 03:57:55,128 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) [2023-02-16 03:57:55,128 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-02-16 03:57:55,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-16 03:57:55,129 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:55,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:57:55,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 03:57:55,133 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:55,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:55,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2023-02-16 03:57:55,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:55,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722985579] [2023-02-16 03:57:55,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:55,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:55,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:55,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722985579] [2023-02-16 03:57:55,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722985579] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:57:55,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:57:55,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:57:55,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613920711] [2023-02-16 03:57:55,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:57:55,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:57:55,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:55,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:57:55,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:57:55,205 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) [2023-02-16 03:57:55,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:57:55,307 INFO L93 Difference]: Finished difference Result 101 states and 137 transitions. [2023-02-16 03:57:55,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:57:55,311 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 [2023-02-16 03:57:55,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:57:55,313 INFO L225 Difference]: With dead ends: 101 [2023-02-16 03:57:55,314 INFO L226 Difference]: Without dead ends: 95 [2023-02-16 03:57:55,315 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 [2023-02-16 03:57:55,316 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 48 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:57:55,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 91 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:57:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-16 03:57:55,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2023-02-16 03:57:55,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 70 states have internal predecessors, (92), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 03:57:55,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 115 transitions. [2023-02-16 03:57:55,337 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 115 transitions. Word has length 9 [2023-02-16 03:57:55,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:57:55,338 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 115 transitions. [2023-02-16 03:57:55,338 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) [2023-02-16 03:57:55,339 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 115 transitions. [2023-02-16 03:57:55,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-16 03:57:55,340 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:55,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:57:55,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 03:57:55,341 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:55,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:55,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2023-02-16 03:57:55,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:55,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137459476] [2023-02-16 03:57:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:55,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:55,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:55,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137459476] [2023-02-16 03:57:55,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137459476] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:57:55,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:57:55,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:57:55,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852113247] [2023-02-16 03:57:55,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:57:55,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:57:55,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:55,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:57:55,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:57:55,393 INFO L87 Difference]: Start difference. First operand 85 states and 115 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) 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) [2023-02-16 03:57:55,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:57:55,474 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2023-02-16 03:57:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:57:55,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) 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 [2023-02-16 03:57:55,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:57:55,477 INFO L225 Difference]: With dead ends: 114 [2023-02-16 03:57:55,477 INFO L226 Difference]: Without dead ends: 110 [2023-02-16 03:57:55,477 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 [2023-02-16 03:57:55,478 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 49 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:57:55,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 93 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:57:55,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-16 03:57:55,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2023-02-16 03:57:55,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.445945945945946) internal successors, (107), 83 states have internal predecessors, (107), 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) [2023-02-16 03:57:55,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2023-02-16 03:57:55,502 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 9 [2023-02-16 03:57:55,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:57:55,502 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2023-02-16 03:57:55,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) 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) [2023-02-16 03:57:55,502 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2023-02-16 03:57:55,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 03:57:55,504 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:55,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:57:55,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 03:57:55,505 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:55,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:55,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2023-02-16 03:57:55,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:55,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785072438] [2023-02-16 03:57:55,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:55,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:55,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:55,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785072438] [2023-02-16 03:57:55,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785072438] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:57:55,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:57:55,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:57:55,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246181300] [2023-02-16 03:57:55,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:57:55,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:57:55,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:55,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:57:55,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:57:55,587 INFO L87 Difference]: Start difference. First operand 102 states and 136 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) [2023-02-16 03:57:55,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:57:55,622 INFO L93 Difference]: Finished difference Result 102 states and 136 transitions. [2023-02-16 03:57:55,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:57:55,622 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 [2023-02-16 03:57:55,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:57:55,623 INFO L225 Difference]: With dead ends: 102 [2023-02-16 03:57:55,623 INFO L226 Difference]: Without dead ends: 100 [2023-02-16 03:57:55,624 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 [2023-02-16 03:57:55,625 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 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 [2023-02-16 03:57:55,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:57:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-16 03:57:55,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-16 03:57:55,633 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) [2023-02-16 03:57:55,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2023-02-16 03:57:55,634 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2023-02-16 03:57:55,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:57:55,635 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2023-02-16 03:57:55,635 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) [2023-02-16 03:57:55,635 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2023-02-16 03:57:55,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-16 03:57:55,636 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:55,636 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:57:55,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-16 03:57:55,636 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:55,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:55,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645175, now seen corresponding path program 1 times [2023-02-16 03:57:55,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:55,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439460179] [2023-02-16 03:57:55,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:55,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:55,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:55,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439460179] [2023-02-16 03:57:55,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439460179] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:57:55,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:57:55,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:57:55,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097512850] [2023-02-16 03:57:55,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:57:55,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:57:55,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:55,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:57:55,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:57:55,676 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-02-16 03:57:55,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:57:55,709 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2023-02-16 03:57:55,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:57:55,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 15 [2023-02-16 03:57:55,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:57:55,711 INFO L225 Difference]: With dead ends: 168 [2023-02-16 03:57:55,711 INFO L226 Difference]: Without dead ends: 97 [2023-02-16 03:57:55,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:57:55,713 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:57:55,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 88 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:57:55,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-16 03:57:55,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2023-02-16 03:57:55,721 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) [2023-02-16 03:57:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2023-02-16 03:57:55,722 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 15 [2023-02-16 03:57:55,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:57:55,723 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2023-02-16 03:57:55,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-02-16 03:57:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2023-02-16 03:57:55,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-16 03:57:55,725 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:55,726 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:57:55,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-16 03:57:55,726 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:55,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:55,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645399, now seen corresponding path program 1 times [2023-02-16 03:57:55,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:55,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660590349] [2023-02-16 03:57:55,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:55,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:55,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:55,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660590349] [2023-02-16 03:57:55,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660590349] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:57:55,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060871981] [2023-02-16 03:57:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:55,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:57:55,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:57:55,815 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) [2023-02-16 03:57:55,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 03:57:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:55,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 03:57:55,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:57:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:55,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:57:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:56,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060871981] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:57:56,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:57:56,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-16 03:57:56,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230684273] [2023-02-16 03:57:56,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:57:56,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 03:57:56,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:56,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 03:57:56,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-16 03:57:56,006 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 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) [2023-02-16 03:57:56,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:57:56,184 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2023-02-16 03:57:56,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-16 03:57:56,184 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 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 15 [2023-02-16 03:57:56,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:57:56,187 INFO L225 Difference]: With dead ends: 274 [2023-02-16 03:57:56,187 INFO L226 Difference]: Without dead ends: 272 [2023-02-16 03:57:56,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-02-16 03:57:56,188 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 236 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:57:56,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 163 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:57:56,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-16 03:57:56,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2023-02-16 03:57:56,207 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) [2023-02-16 03:57:56,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2023-02-16 03:57:56,209 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 15 [2023-02-16 03:57:56,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:57:56,209 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2023-02-16 03:57:56,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 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) [2023-02-16 03:57:56,209 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2023-02-16 03:57:56,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-16 03:57:56,210 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:56,210 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:57:56,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-16 03:57:56,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-16 03:57:56,417 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:56,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:56,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1422985811, now seen corresponding path program 1 times [2023-02-16 03:57:56,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:56,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45831312] [2023-02-16 03:57:56,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:56,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:56,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:56,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45831312] [2023-02-16 03:57:56,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45831312] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:57:56,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654930309] [2023-02-16 03:57:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:56,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:57:56,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:57:56,463 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) [2023-02-16 03:57:56,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 03:57:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:56,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-16 03:57:56,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:57:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:56,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:57:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:56,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654930309] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:57:56,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:57:56,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-16 03:57:56,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419574661] [2023-02-16 03:57:56,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:57:56,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 03:57:56,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:56,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 03:57:56,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-16 03:57:56,642 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 12 states, 10 states have (on average 2.6) 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) [2023-02-16 03:57:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:57:56,819 INFO L93 Difference]: Finished difference Result 512 states and 695 transitions. [2023-02-16 03:57:56,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-16 03:57:56,819 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.6) 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 [2023-02-16 03:57:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:57:56,822 INFO L225 Difference]: With dead ends: 512 [2023-02-16 03:57:56,822 INFO L226 Difference]: Without dead ends: 510 [2023-02-16 03:57:56,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2023-02-16 03:57:56,823 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 164 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:57:56,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 178 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:57:56,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2023-02-16 03:57:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 445. [2023-02-16 03:57:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 347 states have (on average 1.2276657060518732) internal successors, (426), 354 states have internal predecessors, (426), 69 states have call successors, (69), 24 states have call predecessors, (69), 23 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-02-16 03:57:56,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 561 transitions. [2023-02-16 03:57:56,854 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 561 transitions. Word has length 16 [2023-02-16 03:57:56,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:57:56,854 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 561 transitions. [2023-02-16 03:57:56,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.6) 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) [2023-02-16 03:57:56,855 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 561 transitions. [2023-02-16 03:57:56,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-16 03:57:56,855 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:56,856 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] [2023-02-16 03:57:56,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-16 03:57:57,060 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,SelfDestructingSolverStorable6 [2023-02-16 03:57:57,061 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:57,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:57,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2023-02-16 03:57:57,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:57,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282647152] [2023-02-16 03:57:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:57,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:57,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:57:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:57:57,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:57,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282647152] [2023-02-16 03:57:57,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282647152] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:57:57,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515709017] [2023-02-16 03:57:57,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:57,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:57:57,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:57:57,139 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) [2023-02-16 03:57:57,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 03:57:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:57,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 03:57:57,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:57:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:57:57,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:57:57,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515709017] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:57:57,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:57:57,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-02-16 03:57:57,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84528411] [2023-02-16 03:57:57,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:57:57,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 03:57:57,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:57,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 03:57:57,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-02-16 03:57:57,246 INFO L87 Difference]: Start difference. First operand 445 states and 561 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 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) [2023-02-16 03:57:57,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:57:57,377 INFO L93 Difference]: Finished difference Result 478 states and 600 transitions. [2023-02-16 03:57:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 03:57:57,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 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 24 [2023-02-16 03:57:57,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:57:57,379 INFO L225 Difference]: With dead ends: 478 [2023-02-16 03:57:57,379 INFO L226 Difference]: Without dead ends: 477 [2023-02-16 03:57:57,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-02-16 03:57:57,383 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:57:57,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 124 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:57:57,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-02-16 03:57:57,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 444. [2023-02-16 03:57:57,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 347 states have (on average 1.2161383285302594) internal successors, (422), 353 states have internal predecessors, (422), 69 states have call successors, (69), 24 states have call predecessors, (69), 23 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-02-16 03:57:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 557 transitions. [2023-02-16 03:57:57,415 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 557 transitions. Word has length 24 [2023-02-16 03:57:57,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:57:57,415 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 557 transitions. [2023-02-16 03:57:57,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 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) [2023-02-16 03:57:57,416 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 557 transitions. [2023-02-16 03:57:57,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-16 03:57:57,419 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:57,419 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:57:57,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 03:57:57,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:57:57,625 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:57,626 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2023-02-16 03:57:57,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:57,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284397587] [2023-02-16 03:57:57,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:57,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:57,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:57:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:57:57,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:57,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284397587] [2023-02-16 03:57:57,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284397587] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:57:57,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169315635] [2023-02-16 03:57:57,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:57,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:57:57,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:57:57,773 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) [2023-02-16 03:57:57,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 03:57:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:57,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-16 03:57:57,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:57:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:57:57,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:57:57,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:57:57,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169315635] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:57:57,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:57:57,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-02-16 03:57:57,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003678410] [2023-02-16 03:57:57,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:57:57,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-16 03:57:57,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:57,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-16 03:57:57,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-02-16 03:57:57,981 INFO L87 Difference]: Start difference. First operand 444 states and 557 transitions. Second operand has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:57:58,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:57:58,234 INFO L93 Difference]: Finished difference Result 769 states and 1113 transitions. [2023-02-16 03:57:58,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-16 03:57:58,235 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-02-16 03:57:58,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:57:58,238 INFO L225 Difference]: With dead ends: 769 [2023-02-16 03:57:58,238 INFO L226 Difference]: Without dead ends: 767 [2023-02-16 03:57:58,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2023-02-16 03:57:58,240 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 87 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:57:58,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 153 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:57:58,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2023-02-16 03:57:58,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 635. [2023-02-16 03:57:58,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 474 states have (on average 1.2046413502109705) internal successors, (571), 499 states have internal predecessors, (571), 107 states have call successors, (107), 31 states have call predecessors, (107), 49 states have return successors, (187), 104 states have call predecessors, (187), 103 states have call successors, (187) [2023-02-16 03:57:58,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 865 transitions. [2023-02-16 03:57:58,275 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 865 transitions. Word has length 25 [2023-02-16 03:57:58,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:57:58,275 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 865 transitions. [2023-02-16 03:57:58,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:57:58,276 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 865 transitions. [2023-02-16 03:57:58,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-16 03:57:58,276 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:58,276 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-16 03:57:58,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-16 03:57:58,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:57:58,482 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:58,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:58,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1846384600, now seen corresponding path program 1 times [2023-02-16 03:57:58,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:58,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87032238] [2023-02-16 03:57:58,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:58,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:58,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:58,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87032238] [2023-02-16 03:57:58,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87032238] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:57:58,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740125745] [2023-02-16 03:57:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:58,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:57:58,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:57:58,533 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) [2023-02-16 03:57:58,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 03:57:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:58,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 03:57:58,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:57:58,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:58,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:57:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:58,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740125745] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:57:58,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:57:58,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-02-16 03:57:58,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402499076] [2023-02-16 03:57:58,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:57:58,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-16 03:57:58,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:58,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-16 03:57:58,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-02-16 03:57:58,694 INFO L87 Difference]: Start difference. First operand 635 states and 865 transitions. Second operand has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:57:58,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:57:58,926 INFO L93 Difference]: Finished difference Result 989 states and 1395 transitions. [2023-02-16 03:57:58,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 03:57:58,927 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-16 03:57:58,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:57:58,931 INFO L225 Difference]: With dead ends: 989 [2023-02-16 03:57:58,931 INFO L226 Difference]: Without dead ends: 988 [2023-02-16 03:57:58,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2023-02-16 03:57:58,945 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 231 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:57:58,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 267 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:57:58,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2023-02-16 03:57:59,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 917. [2023-02-16 03:57:59,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 681 states have (on average 1.171806167400881) internal successors, (798), 721 states have internal predecessors, (798), 155 states have call successors, (155), 43 states have call predecessors, (155), 76 states have return successors, (278), 152 states have call predecessors, (278), 151 states have call successors, (278) [2023-02-16 03:57:59,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1231 transitions. [2023-02-16 03:57:59,030 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1231 transitions. Word has length 27 [2023-02-16 03:57:59,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:57:59,030 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1231 transitions. [2023-02-16 03:57:59,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:57:59,031 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1231 transitions. [2023-02-16 03:57:59,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-16 03:57:59,031 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:59,032 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:57:59,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 03:57:59,251 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,SelfDestructingSolverStorable9 [2023-02-16 03:57:59,252 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:59,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:59,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1298021223, now seen corresponding path program 1 times [2023-02-16 03:57:59,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:59,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726370663] [2023-02-16 03:57:59,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:59,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:59,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:57:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 03:57:59,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:59,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726370663] [2023-02-16 03:57:59,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726370663] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:57:59,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807124845] [2023-02-16 03:57:59,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:59,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:57:59,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:57:59,321 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) [2023-02-16 03:57:59,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 03:57:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:59,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-16 03:57:59,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:57:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 03:57:59,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:57:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 03:57:59,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807124845] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:57:59,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:57:59,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-02-16 03:57:59,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045134214] [2023-02-16 03:57:59,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:57:59,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-16 03:57:59,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:59,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-16 03:57:59,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-02-16 03:57:59,503 INFO L87 Difference]: Start difference. First operand 917 states and 1231 transitions. Second operand has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:57:59,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:57:59,780 INFO L93 Difference]: Finished difference Result 1430 states and 2152 transitions. [2023-02-16 03:57:59,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 03:57:59,780 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-02-16 03:57:59,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:57:59,786 INFO L225 Difference]: With dead ends: 1430 [2023-02-16 03:57:59,786 INFO L226 Difference]: Without dead ends: 1425 [2023-02-16 03:57:59,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-16 03:57:59,787 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 156 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:57:59,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 123 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:57:59,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2023-02-16 03:57:59,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1080. [2023-02-16 03:57:59,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 804 states have (on average 1.1703980099502487) internal successors, (941), 853 states have internal predecessors, (941), 175 states have call successors, (175), 53 states have call predecessors, (175), 96 states have return successors, (415), 173 states have call predecessors, (415), 170 states have call successors, (415) [2023-02-16 03:57:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1531 transitions. [2023-02-16 03:57:59,931 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1531 transitions. Word has length 27 [2023-02-16 03:57:59,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:57:59,931 INFO L495 AbstractCegarLoop]: Abstraction has 1080 states and 1531 transitions. [2023-02-16 03:57:59,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:57:59,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1531 transitions. [2023-02-16 03:57:59,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-16 03:57:59,944 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:59,944 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] [2023-02-16 03:57:59,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:00,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:00,145 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:00,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:00,146 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2023-02-16 03:58:00,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:00,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988328488] [2023-02-16 03:58:00,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:00,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:00,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:00,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:00,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:00,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988328488] [2023-02-16 03:58:00,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988328488] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:00,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877690029] [2023-02-16 03:58:00,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:00,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:00,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:00,218 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) [2023-02-16 03:58:00,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 03:58:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:00,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-16 03:58:00,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:00,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:00,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877690029] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:00,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:00,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-02-16 03:58:00,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256483238] [2023-02-16 03:58:00,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:00,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-16 03:58:00,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:00,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-16 03:58:00,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-16 03:58:00,418 INFO L87 Difference]: Start difference. First operand 1080 states and 1531 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 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) [2023-02-16 03:58:00,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:00,818 INFO L93 Difference]: Finished difference Result 1847 states and 3105 transitions. [2023-02-16 03:58:00,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 03:58:00,818 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 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 34 [2023-02-16 03:58:00,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:00,826 INFO L225 Difference]: With dead ends: 1847 [2023-02-16 03:58:00,826 INFO L226 Difference]: Without dead ends: 1833 [2023-02-16 03:58:00,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2023-02-16 03:58:00,828 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 131 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:00,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 175 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:58:00,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2023-02-16 03:58:00,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1577. [2023-02-16 03:58:00,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1149 states have (on average 1.162750217580505) internal successors, (1336), 1210 states have internal predecessors, (1336), 271 states have call successors, (271), 73 states have call predecessors, (271), 152 states have return successors, (774), 293 states have call predecessors, (774), 263 states have call successors, (774) [2023-02-16 03:58:00,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 2381 transitions. [2023-02-16 03:58:00,913 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 2381 transitions. Word has length 34 [2023-02-16 03:58:00,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:00,914 INFO L495 AbstractCegarLoop]: Abstraction has 1577 states and 2381 transitions. [2023-02-16 03:58:00,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 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) [2023-02-16 03:58:00,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 2381 transitions. [2023-02-16 03:58:00,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-16 03:58:00,915 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:00,915 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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] [2023-02-16 03:58:00,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-16 03:58:01,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:01,120 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:01,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:01,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1607744024, now seen corresponding path program 1 times [2023-02-16 03:58:01,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:01,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092743493] [2023-02-16 03:58:01,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:01,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:01,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:01,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:01,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:01,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:01,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092743493] [2023-02-16 03:58:01,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092743493] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:01,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513375354] [2023-02-16 03:58:01,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:01,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:01,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:01,194 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) [2023-02-16 03:58:01,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 03:58:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:01,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-16 03:58:01,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:01,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:01,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513375354] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:01,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:58:01,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2023-02-16 03:58:01,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125411794] [2023-02-16 03:58:01,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:58:01,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 03:58:01,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:01,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 03:58:01,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-02-16 03:58:01,425 INFO L87 Difference]: Start difference. First operand 1577 states and 2381 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 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) [2023-02-16 03:58:01,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:01,648 INFO L93 Difference]: Finished difference Result 1736 states and 2788 transitions. [2023-02-16 03:58:01,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-16 03:58:01,649 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 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 36 [2023-02-16 03:58:01,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:01,656 INFO L225 Difference]: With dead ends: 1736 [2023-02-16 03:58:01,656 INFO L226 Difference]: Without dead ends: 1735 [2023-02-16 03:58:01,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-02-16 03:58:01,658 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 65 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:01,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 142 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:58:01,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2023-02-16 03:58:01,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1614. [2023-02-16 03:58:01,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1173 states have (on average 1.1568627450980393) internal successors, (1357), 1231 states have internal predecessors, (1357), 287 states have call successors, (287), 73 states have call predecessors, (287), 149 states have return successors, (703), 309 states have call predecessors, (703), 279 states have call successors, (703) [2023-02-16 03:58:01,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2347 transitions. [2023-02-16 03:58:01,774 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2347 transitions. Word has length 36 [2023-02-16 03:58:01,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:01,775 INFO L495 AbstractCegarLoop]: Abstraction has 1614 states and 2347 transitions. [2023-02-16 03:58:01,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 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) [2023-02-16 03:58:01,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2347 transitions. [2023-02-16 03:58:01,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-16 03:58:01,776 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:01,776 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:58:01,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:01,981 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,SelfDestructingSolverStorable12 [2023-02-16 03:58:01,981 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:01,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:01,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1310665197, now seen corresponding path program 2 times [2023-02-16 03:58:01,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:01,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550954693] [2023-02-16 03:58:01,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:01,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:02,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:58:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:02,136 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-16 03:58:02,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:02,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550954693] [2023-02-16 03:58:02,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550954693] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:02,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634931327] [2023-02-16 03:58:02,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:58:02,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:02,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:02,147 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) [2023-02-16 03:58:02,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 03:58:02,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:58:02,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:02,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-16 03:58:02,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-16 03:58:02,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-16 03:58:02,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634931327] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:02,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:02,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-02-16 03:58:02,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337321214] [2023-02-16 03:58:02,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:02,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-16 03:58:02,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:02,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-16 03:58:02,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-02-16 03:58:02,474 INFO L87 Difference]: Start difference. First operand 1614 states and 2347 transitions. Second operand has 23 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:58:03,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:03,375 INFO L93 Difference]: Finished difference Result 3141 states and 5440 transitions. [2023-02-16 03:58:03,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-16 03:58:03,375 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2023-02-16 03:58:03,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:03,402 INFO L225 Difference]: With dead ends: 3141 [2023-02-16 03:58:03,402 INFO L226 Difference]: Without dead ends: 3140 [2023-02-16 03:58:03,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=573, Invalid=1779, Unknown=0, NotChecked=0, Total=2352 [2023-02-16 03:58:03,422 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 508 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:03,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 188 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:58:03,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2023-02-16 03:58:03,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 2201. [2023-02-16 03:58:03,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 1612 states have (on average 1.1557071960297767) internal successors, (1863), 1689 states have internal predecessors, (1863), 372 states have call successors, (372), 107 states have call predecessors, (372), 212 states have return successors, (1147), 404 states have call predecessors, (1147), 364 states have call successors, (1147) [2023-02-16 03:58:03,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 3382 transitions. [2023-02-16 03:58:03,664 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 3382 transitions. Word has length 43 [2023-02-16 03:58:03,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:03,665 INFO L495 AbstractCegarLoop]: Abstraction has 2201 states and 3382 transitions. [2023-02-16 03:58:03,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:58:03,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 3382 transitions. [2023-02-16 03:58:03,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 03:58:03,666 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:03,666 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:58:03,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:03,871 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,SelfDestructingSolverStorable13 [2023-02-16 03:58:03,871 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:03,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:03,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1058043410, now seen corresponding path program 2 times [2023-02-16 03:58:03,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:03,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848431193] [2023-02-16 03:58:03,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:03,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:03,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:03,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:03,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:03,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848431193] [2023-02-16 03:58:03,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848431193] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:03,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340595497] [2023-02-16 03:58:03,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:58:03,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:03,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:03,984 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) [2023-02-16 03:58:03,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 03:58:04,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:58:04,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:04,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-16 03:58:04,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:04,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:04,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340595497] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:04,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:04,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-02-16 03:58:04,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439282974] [2023-02-16 03:58:04,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:04,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-16 03:58:04,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:04,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-16 03:58:04,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-02-16 03:58:04,230 INFO L87 Difference]: Start difference. First operand 2201 states and 3382 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 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) [2023-02-16 03:58:05,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:05,173 INFO L93 Difference]: Finished difference Result 4449 states and 8202 transitions. [2023-02-16 03:58:05,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-16 03:58:05,174 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 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 44 [2023-02-16 03:58:05,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:05,188 INFO L225 Difference]: With dead ends: 4449 [2023-02-16 03:58:05,188 INFO L226 Difference]: Without dead ends: 3134 [2023-02-16 03:58:05,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2023-02-16 03:58:05,198 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 198 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:05,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 290 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:58:05,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2023-02-16 03:58:05,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 2494. [2023-02-16 03:58:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 1823 states have (on average 1.1492046077893583) internal successors, (2095), 1909 states have internal predecessors, (2095), 428 states have call successors, (428), 122 states have call predecessors, (428), 238 states have return successors, (1243), 462 states have call predecessors, (1243), 420 states have call successors, (1243) [2023-02-16 03:58:05,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 3766 transitions. [2023-02-16 03:58:05,370 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 3766 transitions. Word has length 44 [2023-02-16 03:58:05,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:05,371 INFO L495 AbstractCegarLoop]: Abstraction has 2494 states and 3766 transitions. [2023-02-16 03:58:05,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 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) [2023-02-16 03:58:05,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 3766 transitions. [2023-02-16 03:58:05,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 03:58:05,373 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:05,373 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:58:05,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:05,578 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,SelfDestructingSolverStorable14 [2023-02-16 03:58:05,579 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:05,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:05,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1051982124, now seen corresponding path program 1 times [2023-02-16 03:58:05,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:05,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616563945] [2023-02-16 03:58:05,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:05,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:05,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:05,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:05,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:05,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-16 03:58:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-16 03:58:05,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:05,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616563945] [2023-02-16 03:58:05,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616563945] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:05,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719140576] [2023-02-16 03:58:05,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:05,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:05,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:05,632 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) [2023-02-16 03:58:05,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 03:58:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:05,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 03:58:05,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 03:58:05,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 03:58:05,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719140576] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:05,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:05,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2023-02-16 03:58:05,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416877511] [2023-02-16 03:58:05,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:05,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 03:58:05,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:05,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 03:58:05,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-16 03:58:05,825 INFO L87 Difference]: Start difference. First operand 2494 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-16 03:58:05,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:05,992 INFO L93 Difference]: Finished difference Result 3517 states and 5520 transitions. [2023-02-16 03:58:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 03:58:05,993 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2023-02-16 03:58:05,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:05,998 INFO L225 Difference]: With dead ends: 3517 [2023-02-16 03:58:05,998 INFO L226 Difference]: Without dead ends: 1211 [2023-02-16 03:58:06,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:58:06,010 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 53 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:06,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 103 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:58:06,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2023-02-16 03:58:06,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1182. [2023-02-16 03:58:06,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 881 states have (on average 1.112372304199773) internal successors, (980), 905 states have internal predecessors, (980), 212 states have call successors, (212), 67 states have call predecessors, (212), 85 states have return successors, (333), 209 states have call predecessors, (333), 208 states have call successors, (333) [2023-02-16 03:58:06,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1525 transitions. [2023-02-16 03:58:06,073 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1525 transitions. Word has length 44 [2023-02-16 03:58:06,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:06,074 INFO L495 AbstractCegarLoop]: Abstraction has 1182 states and 1525 transitions. [2023-02-16 03:58:06,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-16 03:58:06,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1525 transitions. [2023-02-16 03:58:06,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-16 03:58:06,075 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:06,075 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:58:06,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:06,293 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,SelfDestructingSolverStorable15 [2023-02-16 03:58:06,293 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:06,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:06,294 INFO L85 PathProgramCache]: Analyzing trace with hash 843839239, now seen corresponding path program 1 times [2023-02-16 03:58:06,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:06,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685802422] [2023-02-16 03:58:06,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:06,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:06,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:06,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:06,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:06,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 03:58:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 03:58:06,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:06,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685802422] [2023-02-16 03:58:06,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685802422] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:06,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905134635] [2023-02-16 03:58:06,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:06,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:06,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:06,473 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) [2023-02-16 03:58:06,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 03:58:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:06,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-16 03:58:06,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-16 03:58:06,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 03:58:06,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905134635] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:06,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:06,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-16 03:58:06,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957621513] [2023-02-16 03:58:06,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:06,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-16 03:58:06,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:06,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-16 03:58:06,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-02-16 03:58:06,978 INFO L87 Difference]: Start difference. First operand 1182 states and 1525 transitions. Second operand has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 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) [2023-02-16 03:58:08,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:08,188 INFO L93 Difference]: Finished difference Result 3123 states and 5780 transitions. [2023-02-16 03:58:08,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-16 03:58:08,189 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 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 53 [2023-02-16 03:58:08,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:08,207 INFO L225 Difference]: With dead ends: 3123 [2023-02-16 03:58:08,207 INFO L226 Difference]: Without dead ends: 3117 [2023-02-16 03:58:08,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1681 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2023-02-16 03:58:08,210 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 253 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:08,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 220 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:58:08,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2023-02-16 03:58:08,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 2241. [2023-02-16 03:58:08,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 1548 states have (on average 1.0872093023255813) internal successors, (1683), 1572 states have internal predecessors, (1683), 429 states have call successors, (429), 81 states have call predecessors, (429), 260 states have return successors, (2514), 587 states have call predecessors, (2514), 423 states have call successors, (2514) [2023-02-16 03:58:08,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 4626 transitions. [2023-02-16 03:58:08,397 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 4626 transitions. Word has length 53 [2023-02-16 03:58:08,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:08,397 INFO L495 AbstractCegarLoop]: Abstraction has 2241 states and 4626 transitions. [2023-02-16 03:58:08,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 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) [2023-02-16 03:58:08,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 4626 transitions. [2023-02-16 03:58:08,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-16 03:58:08,399 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:08,399 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-16 03:58:08,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:08,603 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,SelfDestructingSolverStorable16 [2023-02-16 03:58:08,604 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:08,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:08,604 INFO L85 PathProgramCache]: Analyzing trace with hash 2013961680, now seen corresponding path program 1 times [2023-02-16 03:58:08,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:08,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689865552] [2023-02-16 03:58:08,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:08,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 03:58:08,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:08,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689865552] [2023-02-16 03:58:08,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689865552] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:08,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551918371] [2023-02-16 03:58:08,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:08,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:08,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:08,730 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) [2023-02-16 03:58:08,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 03:58:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:08,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-16 03:58:08,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 03:58:08,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 03:58:08,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551918371] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:08,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:08,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-16 03:58:08,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109558612] [2023-02-16 03:58:08,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:08,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-16 03:58:08,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:08,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-16 03:58:08,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-16 03:58:08,972 INFO L87 Difference]: Start difference. First operand 2241 states and 4626 transitions. Second operand has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 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) [2023-02-16 03:58:09,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:09,747 INFO L93 Difference]: Finished difference Result 6148 states and 12929 transitions. [2023-02-16 03:58:09,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-16 03:58:09,748 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 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 57 [2023-02-16 03:58:09,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:09,784 INFO L225 Difference]: With dead ends: 6148 [2023-02-16 03:58:09,784 INFO L226 Difference]: Without dead ends: 6147 [2023-02-16 03:58:09,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2023-02-16 03:58:09,787 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 716 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:09,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 337 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:58:09,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6147 states. [2023-02-16 03:58:10,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6147 to 6063. [2023-02-16 03:58:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6063 states, 4212 states have (on average 1.089031339031339) internal successors, (4587), 4284 states have internal predecessors, (4587), 1161 states have call successors, (1161), 231 states have call predecessors, (1161), 686 states have return successors, (6822), 1547 states have call predecessors, (6822), 1155 states have call successors, (6822) [2023-02-16 03:58:10,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6063 states to 6063 states and 12570 transitions. [2023-02-16 03:58:10,291 INFO L78 Accepts]: Start accepts. Automaton has 6063 states and 12570 transitions. Word has length 57 [2023-02-16 03:58:10,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:10,291 INFO L495 AbstractCegarLoop]: Abstraction has 6063 states and 12570 transitions. [2023-02-16 03:58:10,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 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) [2023-02-16 03:58:10,291 INFO L276 IsEmpty]: Start isEmpty. Operand 6063 states and 12570 transitions. [2023-02-16 03:58:10,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-16 03:58:10,292 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:10,293 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:58:10,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:10,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-16 03:58:10,498 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:10,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:10,498 INFO L85 PathProgramCache]: Analyzing trace with hash -814290418, now seen corresponding path program 1 times [2023-02-16 03:58:10,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:10,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303382697] [2023-02-16 03:58:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:10,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:10,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:10,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:10,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:10,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 03:58:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 03:58:10,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:10,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303382697] [2023-02-16 03:58:10,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303382697] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:10,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882642357] [2023-02-16 03:58:10,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:10,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:10,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:10,660 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) [2023-02-16 03:58:10,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-16 03:58:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:10,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-16 03:58:10,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-16 03:58:10,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 03:58:11,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882642357] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:11,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:11,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-16 03:58:11,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502271731] [2023-02-16 03:58:11,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:11,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-16 03:58:11,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:11,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-16 03:58:11,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-02-16 03:58:11,102 INFO L87 Difference]: Start difference. First operand 6063 states and 12570 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 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) [2023-02-16 03:58:13,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:13,349 INFO L93 Difference]: Finished difference Result 22151 states and 80869 transitions. [2023-02-16 03:58:13,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-16 03:58:13,349 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 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 55 [2023-02-16 03:58:13,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:13,699 INFO L225 Difference]: With dead ends: 22151 [2023-02-16 03:58:13,700 INFO L226 Difference]: Without dead ends: 16963 [2023-02-16 03:58:13,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=905, Invalid=3517, Unknown=0, NotChecked=0, Total=4422 [2023-02-16 03:58:13,789 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 220 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:13,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 344 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:58:13,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16963 states. [2023-02-16 03:58:15,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16963 to 13356. [2023-02-16 03:58:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13356 states, 8756 states have (on average 1.0572179077204202) internal successors, (9257), 8789 states have internal predecessors, (9257), 2669 states have call successors, (2669), 308 states have call predecessors, (2669), 1927 states have return successors, (36980), 4258 states have call predecessors, (36980), 2658 states have call successors, (36980) [2023-02-16 03:58:15,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13356 states to 13356 states and 48906 transitions. [2023-02-16 03:58:15,667 INFO L78 Accepts]: Start accepts. Automaton has 13356 states and 48906 transitions. Word has length 55 [2023-02-16 03:58:15,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:15,668 INFO L495 AbstractCegarLoop]: Abstraction has 13356 states and 48906 transitions. [2023-02-16 03:58:15,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 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) [2023-02-16 03:58:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 13356 states and 48906 transitions. [2023-02-16 03:58:15,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-16 03:58:15,669 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:15,670 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-02-16 03:58:15,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-16 03:58:15,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:15,874 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:15,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:15,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1321083776, now seen corresponding path program 2 times [2023-02-16 03:58:15,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:15,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074517287] [2023-02-16 03:58:15,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:15,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:58:16,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:16,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074517287] [2023-02-16 03:58:16,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074517287] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:16,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006691099] [2023-02-16 03:58:16,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:58:16,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:16,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:16,027 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) [2023-02-16 03:58:16,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-16 03:58:16,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:58:16,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:16,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-16 03:58:16,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:58:16,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:58:16,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006691099] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:16,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:16,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2023-02-16 03:58:16,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915934760] [2023-02-16 03:58:16,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:16,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-16 03:58:16,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:16,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-16 03:58:16,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2023-02-16 03:58:16,358 INFO L87 Difference]: Start difference. First operand 13356 states and 48906 transitions. Second operand has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:58:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:18,698 INFO L93 Difference]: Finished difference Result 20225 states and 73221 transitions. [2023-02-16 03:58:18,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-16 03:58:18,699 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-16 03:58:18,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:18,864 INFO L225 Difference]: With dead ends: 20225 [2023-02-16 03:58:18,864 INFO L226 Difference]: Without dead ends: 20224 [2023-02-16 03:58:18,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1054, Invalid=2368, Unknown=0, NotChecked=0, Total=3422 [2023-02-16 03:58:18,878 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 504 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:18,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 559 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:58:18,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20224 states. [2023-02-16 03:58:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20224 to 19840. [2023-02-16 03:58:21,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19840 states, 13022 states have (on average 1.0495315619720473) internal successors, (13667), 13129 states have internal predecessors, (13667), 3917 states have call successors, (3917), 452 states have call predecessors, (3917), 2897 states have return successors, (53631), 6258 states have call predecessors, (53631), 3906 states have call successors, (53631) [2023-02-16 03:58:21,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19840 states to 19840 states and 71215 transitions. [2023-02-16 03:58:21,434 INFO L78 Accepts]: Start accepts. Automaton has 19840 states and 71215 transitions. Word has length 59 [2023-02-16 03:58:21,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:21,434 INFO L495 AbstractCegarLoop]: Abstraction has 19840 states and 71215 transitions. [2023-02-16 03:58:21,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:58:21,435 INFO L276 IsEmpty]: Start isEmpty. Operand 19840 states and 71215 transitions. [2023-02-16 03:58:21,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-16 03:58:21,441 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:21,442 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:58:21,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-16 03:58:21,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:21,647 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:21,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:21,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1106576793, now seen corresponding path program 2 times [2023-02-16 03:58:21,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:21,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382782523] [2023-02-16 03:58:21,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:21,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:21,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:21,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:21,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:21,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:21,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 03:58:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 70 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-16 03:58:21,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:21,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382782523] [2023-02-16 03:58:21,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382782523] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:21,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45507540] [2023-02-16 03:58:21,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:58:21,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:21,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:21,868 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) [2023-02-16 03:58:21,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-16 03:58:21,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:58:21,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:21,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-16 03:58:21,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-16 03:58:21,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 78 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-16 03:58:22,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45507540] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:22,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:22,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2023-02-16 03:58:22,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914608079] [2023-02-16 03:58:22,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:22,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-16 03:58:22,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:22,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-16 03:58:22,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 03:58:22,648 INFO L87 Difference]: Start difference. First operand 19840 states and 71215 transitions. Second operand has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 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) [2023-02-16 03:58:24,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:24,705 INFO L93 Difference]: Finished difference Result 30265 states and 111648 transitions. [2023-02-16 03:58:24,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-16 03:58:24,706 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 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 72 [2023-02-16 03:58:24,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:24,777 INFO L225 Difference]: With dead ends: 30265 [2023-02-16 03:58:24,778 INFO L226 Difference]: Without dead ends: 12260 [2023-02-16 03:58:25,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=667, Invalid=2639, Unknown=0, NotChecked=0, Total=3306 [2023-02-16 03:58:25,284 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 148 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:25,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 380 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:58:25,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12260 states. [2023-02-16 03:58:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12260 to 11692. [2023-02-16 03:58:26,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11692 states, 8105 states have (on average 1.073781616286243) internal successors, (8703), 8384 states have internal predecessors, (8703), 2284 states have call successors, (2284), 476 states have call predecessors, (2284), 1299 states have return successors, (7789), 2831 states have call predecessors, (7789), 2276 states have call successors, (7789) [2023-02-16 03:58:26,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11692 states to 11692 states and 18776 transitions. [2023-02-16 03:58:26,297 INFO L78 Accepts]: Start accepts. Automaton has 11692 states and 18776 transitions. Word has length 72 [2023-02-16 03:58:26,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:26,297 INFO L495 AbstractCegarLoop]: Abstraction has 11692 states and 18776 transitions. [2023-02-16 03:58:26,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 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) [2023-02-16 03:58:26,298 INFO L276 IsEmpty]: Start isEmpty. Operand 11692 states and 18776 transitions. [2023-02-16 03:58:26,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-16 03:58:26,300 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:26,300 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:58:26,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-16 03:58:26,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:26,505 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:26,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:26,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1935422832, now seen corresponding path program 3 times [2023-02-16 03:58:26,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:26,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691704790] [2023-02-16 03:58:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:26,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:26,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:26,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 62 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:26,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:26,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691704790] [2023-02-16 03:58:26,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691704790] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:26,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774657727] [2023-02-16 03:58:26,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:58:26,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:26,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:26,691 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) [2023-02-16 03:58:26,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-16 03:58:26,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-16 03:58:26,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:26,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-16 03:58:26,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:26,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:27,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774657727] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:27,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:27,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2023-02-16 03:58:27,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611075846] [2023-02-16 03:58:27,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:27,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-16 03:58:27,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:27,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-16 03:58:27,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2023-02-16 03:58:27,129 INFO L87 Difference]: Start difference. First operand 11692 states and 18776 transitions. Second operand has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 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) [2023-02-16 03:58:28,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:28,395 INFO L93 Difference]: Finished difference Result 12447 states and 19918 transitions. [2023-02-16 03:58:28,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 03:58:28,396 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 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 68 [2023-02-16 03:58:28,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:28,436 INFO L225 Difference]: With dead ends: 12447 [2023-02-16 03:58:28,437 INFO L226 Difference]: Without dead ends: 12446 [2023-02-16 03:58:28,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2023-02-16 03:58:28,442 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 182 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:28,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 295 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:58:28,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12446 states. [2023-02-16 03:58:29,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12446 to 11800. [2023-02-16 03:58:29,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11800 states, 8177 states have (on average 1.0699523052464228) internal successors, (8749), 8456 states have internal predecessors, (8749), 2284 states have call successors, (2284), 476 states have call predecessors, (2284), 1335 states have return successors, (7883), 2867 states have call predecessors, (7883), 2276 states have call successors, (7883) [2023-02-16 03:58:29,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11800 states to 11800 states and 18916 transitions. [2023-02-16 03:58:29,431 INFO L78 Accepts]: Start accepts. Automaton has 11800 states and 18916 transitions. Word has length 68 [2023-02-16 03:58:29,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:29,431 INFO L495 AbstractCegarLoop]: Abstraction has 11800 states and 18916 transitions. [2023-02-16 03:58:29,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 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) [2023-02-16 03:58:29,432 INFO L276 IsEmpty]: Start isEmpty. Operand 11800 states and 18916 transitions. [2023-02-16 03:58:29,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-02-16 03:58:29,434 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:29,435 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-16 03:58:29,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-16 03:58:29,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:29,639 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:29,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:29,639 INFO L85 PathProgramCache]: Analyzing trace with hash -2007669540, now seen corresponding path program 2 times [2023-02-16 03:58:29,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:29,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343668533] [2023-02-16 03:58:29,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:29,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:29,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:58:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:29,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:29,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:29,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:29,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:29,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 03:58:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:29,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-16 03:58:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 101 proven. 28 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-02-16 03:58:29,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:29,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343668533] [2023-02-16 03:58:29,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343668533] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:29,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179382853] [2023-02-16 03:58:29,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:58:29,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:29,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:29,779 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) [2023-02-16 03:58:29,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-16 03:58:29,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:58:29,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:29,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-16 03:58:29,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 103 proven. 15 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-16 03:58:29,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 103 proven. 26 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-02-16 03:58:30,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179382853] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:30,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:30,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 8] total 14 [2023-02-16 03:58:30,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365028547] [2023-02-16 03:58:30,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:30,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 03:58:30,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:30,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 03:58:30,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-02-16 03:58:30,183 INFO L87 Difference]: Start difference. First operand 11800 states and 18916 transitions. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 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) [2023-02-16 03:58:31,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:31,135 INFO L93 Difference]: Finished difference Result 22584 states and 40813 transitions. [2023-02-16 03:58:31,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 03:58:31,136 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 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 89 [2023-02-16 03:58:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:31,181 INFO L225 Difference]: With dead ends: 22584 [2023-02-16 03:58:31,181 INFO L226 Difference]: Without dead ends: 12984 [2023-02-16 03:58:31,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 184 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-02-16 03:58:31,221 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:31,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 85 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:58:31,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12984 states. [2023-02-16 03:58:32,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12984 to 11794. [2023-02-16 03:58:32,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11794 states, 8174 states have (on average 1.0699779789576707) internal successors, (8746), 8453 states have internal predecessors, (8746), 2281 states have call successors, (2281), 476 states have call predecessors, (2281), 1335 states have return successors, (7803), 2864 states have call predecessors, (7803), 2246 states have call successors, (7803) [2023-02-16 03:58:32,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11794 states to 11794 states and 18830 transitions. [2023-02-16 03:58:32,113 INFO L78 Accepts]: Start accepts. Automaton has 11794 states and 18830 transitions. Word has length 89 [2023-02-16 03:58:32,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:32,113 INFO L495 AbstractCegarLoop]: Abstraction has 11794 states and 18830 transitions. [2023-02-16 03:58:32,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 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) [2023-02-16 03:58:32,114 INFO L276 IsEmpty]: Start isEmpty. Operand 11794 states and 18830 transitions. [2023-02-16 03:58:32,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-16 03:58:32,117 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:32,117 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-16 03:58:32,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:32,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:32,321 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:32,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:32,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1307053986, now seen corresponding path program 3 times [2023-02-16 03:58:32,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:32,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121974328] [2023-02-16 03:58:32,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:32,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:32,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:32,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:32,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:32,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:32,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:32,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:32,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 03:58:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:32,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-16 03:58:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:32,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-02-16 03:58:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 117 proven. 51 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-02-16 03:58:32,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:32,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121974328] [2023-02-16 03:58:32,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121974328] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:32,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796472251] [2023-02-16 03:58:32,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:58:32,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:32,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:32,537 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) [2023-02-16 03:58:32,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-16 03:58:32,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-16 03:58:32,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:32,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-16 03:58:32,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 153 proven. 26 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-02-16 03:58:32,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 123 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-16 03:58:33,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796472251] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:33,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:33,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 17 [2023-02-16 03:58:33,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603170296] [2023-02-16 03:58:33,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:33,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 03:58:33,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:33,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 03:58:33,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:58:33,391 INFO L87 Difference]: Start difference. First operand 11794 states and 18830 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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) [2023-02-16 03:58:34,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:34,598 INFO L93 Difference]: Finished difference Result 24299 states and 49196 transitions. [2023-02-16 03:58:34,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 03:58:34,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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 100 [2023-02-16 03:58:34,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:34,659 INFO L225 Difference]: With dead ends: 24299 [2023-02-16 03:58:34,659 INFO L226 Difference]: Without dead ends: 14733 [2023-02-16 03:58:34,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 207 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-02-16 03:58:34,715 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:34,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 147 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:58:34,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14733 states. [2023-02-16 03:58:36,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14733 to 14372. [2023-02-16 03:58:36,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14372 states, 9692 states have (on average 1.0522080066033843) internal successors, (10198), 9951 states have internal predecessors, (10198), 2881 states have call successors, (2881), 496 states have call predecessors, (2881), 1795 states have return successors, (9707), 3924 states have call predecessors, (9707), 2826 states have call successors, (9707) [2023-02-16 03:58:36,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14372 states to 14372 states and 22786 transitions. [2023-02-16 03:58:36,167 INFO L78 Accepts]: Start accepts. Automaton has 14372 states and 22786 transitions. Word has length 100 [2023-02-16 03:58:36,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:36,167 INFO L495 AbstractCegarLoop]: Abstraction has 14372 states and 22786 transitions. [2023-02-16 03:58:36,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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) [2023-02-16 03:58:36,168 INFO L276 IsEmpty]: Start isEmpty. Operand 14372 states and 22786 transitions. [2023-02-16 03:58:36,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-16 03:58:36,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:36,172 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 7, 7, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:58:36,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-16 03:58:36,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:36,385 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:36,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:36,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1104252262, now seen corresponding path program 3 times [2023-02-16 03:58:36,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:36,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848325989] [2023-02-16 03:58:36,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:36,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:36,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:36,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:36,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:36,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 03:58:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 120 proven. 86 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 03:58:36,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:36,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848325989] [2023-02-16 03:58:36,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848325989] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:36,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816296522] [2023-02-16 03:58:36,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:58:36,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:36,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:36,636 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) [2023-02-16 03:58:36,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-16 03:58:36,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-16 03:58:36,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:36,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-16 03:58:36,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 113 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-02-16 03:58:36,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 142 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-16 03:58:37,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816296522] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:37,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:37,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2023-02-16 03:58:37,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833835066] [2023-02-16 03:58:37,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:37,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-16 03:58:37,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:37,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-16 03:58:37,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2023-02-16 03:58:37,035 INFO L87 Difference]: Start difference. First operand 14372 states and 22786 transitions. Second operand has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 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) [2023-02-16 03:58:39,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:39,063 INFO L93 Difference]: Finished difference Result 25330 states and 43230 transitions. [2023-02-16 03:58:39,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-16 03:58:39,063 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 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 87 [2023-02-16 03:58:39,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:39,117 INFO L225 Difference]: With dead ends: 25330 [2023-02-16 03:58:39,117 INFO L226 Difference]: Without dead ends: 13103 [2023-02-16 03:58:39,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2023-02-16 03:58:39,177 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 240 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:39,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 157 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:58:39,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13103 states. [2023-02-16 03:58:40,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13103 to 11143. [2023-02-16 03:58:40,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11143 states, 7586 states have (on average 1.0460058001581862) internal successors, (7935), 7834 states have internal predecessors, (7935), 2175 states have call successors, (2175), 424 states have call predecessors, (2175), 1378 states have return successors, (5289), 2884 states have call predecessors, (5289), 2141 states have call successors, (5289) [2023-02-16 03:58:40,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11143 states to 11143 states and 15399 transitions. [2023-02-16 03:58:40,066 INFO L78 Accepts]: Start accepts. Automaton has 11143 states and 15399 transitions. Word has length 87 [2023-02-16 03:58:40,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:40,066 INFO L495 AbstractCegarLoop]: Abstraction has 11143 states and 15399 transitions. [2023-02-16 03:58:40,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 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) [2023-02-16 03:58:40,066 INFO L276 IsEmpty]: Start isEmpty. Operand 11143 states and 15399 transitions. [2023-02-16 03:58:40,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-16 03:58:40,070 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:40,071 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:58:40,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:40,274 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,SelfDestructingSolverStorable24 [2023-02-16 03:58:40,275 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:40,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:40,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1765664819, now seen corresponding path program 4 times [2023-02-16 03:58:40,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:40,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707905689] [2023-02-16 03:58:40,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:40,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:40,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:40,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:40,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:40,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:40,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:40,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 03:58:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:40,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-16 03:58:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:40,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-02-16 03:58:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 51 proven. 69 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-02-16 03:58:40,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:40,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707905689] [2023-02-16 03:58:40,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707905689] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:40,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719559969] [2023-02-16 03:58:40,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 03:58:40,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:40,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:40,616 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) [2023-02-16 03:58:40,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-16 03:58:40,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 03:58:40,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:40,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-16 03:58:40,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-16 03:58:40,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-16 03:58:42,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719559969] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:42,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:42,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2023-02-16 03:58:42,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900726540] [2023-02-16 03:58:42,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:42,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-16 03:58:42,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:42,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-16 03:58:42,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2023-02-16 03:58:42,038 INFO L87 Difference]: Start difference. First operand 11143 states and 15399 transitions. Second operand has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 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) [2023-02-16 03:58:46,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:46,855 INFO L93 Difference]: Finished difference Result 34681 states and 55092 transitions. [2023-02-16 03:58:46,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-02-16 03:58:46,855 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 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 91 [2023-02-16 03:58:46,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:46,975 INFO L225 Difference]: With dead ends: 34681 [2023-02-16 03:58:46,976 INFO L226 Difference]: Without dead ends: 33579 [2023-02-16 03:58:46,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12273 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2023-02-16 03:58:46,999 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 391 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 993 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 993 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:46,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 301 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [993 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-16 03:58:47,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33579 states. [2023-02-16 03:58:48,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33579 to 21093. [2023-02-16 03:58:48,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21093 states, 13678 states have (on average 1.0274162889311302) internal successors, (14053), 13909 states have internal predecessors, (14053), 4366 states have call successors, (4366), 532 states have call predecessors, (4366), 3045 states have return successors, (14390), 6651 states have call predecessors, (14390), 4312 states have call successors, (14390) [2023-02-16 03:58:48,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21093 states to 21093 states and 32809 transitions. [2023-02-16 03:58:48,944 INFO L78 Accepts]: Start accepts. Automaton has 21093 states and 32809 transitions. Word has length 91 [2023-02-16 03:58:48,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:48,944 INFO L495 AbstractCegarLoop]: Abstraction has 21093 states and 32809 transitions. [2023-02-16 03:58:48,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 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) [2023-02-16 03:58:48,944 INFO L276 IsEmpty]: Start isEmpty. Operand 21093 states and 32809 transitions. [2023-02-16 03:58:48,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-16 03:58:48,950 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:48,950 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2023-02-16 03:58:48,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-02-16 03:58:49,154 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,SelfDestructingSolverStorable25 [2023-02-16 03:58:49,154 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:49,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:49,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1934326320, now seen corresponding path program 3 times [2023-02-16 03:58:49,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:49,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369599108] [2023-02-16 03:58:49,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:49,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:58:49,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:49,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369599108] [2023-02-16 03:58:49,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369599108] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:49,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678319567] [2023-02-16 03:58:49,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:58:49,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:49,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:49,547 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) [2023-02-16 03:58:49,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-16 03:58:49,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-16 03:58:49,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:49,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-16 03:58:49,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:58:49,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:58:50,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678319567] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:50,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:50,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2023-02-16 03:58:50,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081206917] [2023-02-16 03:58:50,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:50,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-16 03:58:50,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:50,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-16 03:58:50,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=3036, Unknown=0, NotChecked=0, Total=4032 [2023-02-16 03:58:50,370 INFO L87 Difference]: Start difference. First operand 21093 states and 32809 transitions. Second operand has 64 states, 61 states have (on average 3.4918032786885247) internal successors, (213), 34 states have internal predecessors, (213), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:58:54,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:54,499 INFO L93 Difference]: Finished difference Result 36182 states and 56297 transitions. [2023-02-16 03:58:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-02-16 03:58:54,499 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 61 states have (on average 3.4918032786885247) internal successors, (213), 34 states have internal predecessors, (213), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2023-02-16 03:58:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:54,619 INFO L225 Difference]: With dead ends: 36182 [2023-02-16 03:58:54,620 INFO L226 Difference]: Without dead ends: 36181 [2023-02-16 03:58:54,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3484 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4654, Invalid=10352, Unknown=0, NotChecked=0, Total=15006 [2023-02-16 03:58:54,636 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1637 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 865 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1641 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 865 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:54,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1641 Valid, 862 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [865 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-16 03:58:54,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36181 states. [2023-02-16 03:58:57,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36181 to 36181. [2023-02-16 03:58:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36181 states, 23422 states have (on average 1.0283067201776108) internal successors, (24085), 23941 states have internal predecessors, (24085), 7326 states have call successors, (7326), 820 states have call predecessors, (7326), 5429 states have return successors, (24870), 11419 states have call predecessors, (24870), 7272 states have call successors, (24870) [2023-02-16 03:58:57,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36181 states to 36181 states and 56281 transitions. [2023-02-16 03:58:57,554 INFO L78 Accepts]: Start accepts. Automaton has 36181 states and 56281 transitions. Word has length 123 [2023-02-16 03:58:57,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:57,555 INFO L495 AbstractCegarLoop]: Abstraction has 36181 states and 56281 transitions. [2023-02-16 03:58:57,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 61 states have (on average 3.4918032786885247) internal successors, (213), 34 states have internal predecessors, (213), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:58:57,555 INFO L276 IsEmpty]: Start isEmpty. Operand 36181 states and 56281 transitions. [2023-02-16 03:58:57,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-02-16 03:58:57,563 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:57,564 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2023-02-16 03:58:57,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:57,770 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,SelfDestructingSolverStorable26 [2023-02-16 03:58:57,770 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:57,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:57,771 INFO L85 PathProgramCache]: Analyzing trace with hash 951429890, now seen corresponding path program 2 times [2023-02-16 03:58:57,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:57,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598892673] [2023-02-16 03:58:57,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:57,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:58,139 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-16 03:58:58,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:58,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598892673] [2023-02-16 03:58:58,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598892673] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:58,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359470966] [2023-02-16 03:58:58,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:58:58,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:58,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:58,145 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) [2023-02-16 03:58:58,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-16 03:58:58,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:58:58,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:58,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-16 03:58:58,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-16 03:58:58,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-16 03:58:58,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359470966] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:58,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:58,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-02-16 03:58:58,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465291074] [2023-02-16 03:58:58,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:58,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-16 03:58:58,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:58,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-16 03:58:58,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2023-02-16 03:58:58,850 INFO L87 Difference]: Start difference. First operand 36181 states and 56281 transitions. Second operand has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 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) [2023-02-16 03:59:05,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:59:05,681 INFO L93 Difference]: Finished difference Result 81606 states and 127883 transitions. [2023-02-16 03:59:05,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-16 03:59:05,681 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 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 141 [2023-02-16 03:59:05,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:59:06,079 INFO L225 Difference]: With dead ends: 81606 [2023-02-16 03:59:06,079 INFO L226 Difference]: Without dead ends: 81605 [2023-02-16 03:59:06,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 275 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2023-02-16 03:59:06,121 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1802 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 734 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1805 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 734 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:59:06,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1805 Valid, 529 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [734 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 03:59:06,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81605 states. [2023-02-16 03:59:12,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81605 to 81553. [2023-02-16 03:59:12,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81553 states, 52918 states have (on average 1.0290827317736877) internal successors, (54457), 54121 states have internal predecessors, (54457), 16494 states have call successors, (16494), 1900 states have call predecessors, (16494), 12137 states have return successors, (56910), 25531 states have call predecessors, (56910), 16380 states have call successors, (56910) [2023-02-16 03:59:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81553 states to 81553 states and 127861 transitions. [2023-02-16 03:59:13,147 INFO L78 Accepts]: Start accepts. Automaton has 81553 states and 127861 transitions. Word has length 141 [2023-02-16 03:59:13,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:59:13,148 INFO L495 AbstractCegarLoop]: Abstraction has 81553 states and 127861 transitions. [2023-02-16 03:59:13,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 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) [2023-02-16 03:59:13,148 INFO L276 IsEmpty]: Start isEmpty. Operand 81553 states and 127861 transitions. [2023-02-16 03:59:13,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-02-16 03:59:13,163 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:59:13,163 INFO L195 NwaCegarLoop]: trace histogram [31, 24, 20, 20, 20, 20, 19, 19, 17, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-16 03:59:13,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-16 03:59:13,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:59:13,369 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:59:13,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:59:13,369 INFO L85 PathProgramCache]: Analyzing trace with hash -76175906, now seen corresponding path program 1 times [2023-02-16 03:59:13,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:59:13,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539623246] [2023-02-16 03:59:13,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:59:13,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:59:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:59:13,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-02-16 03:59:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:59:13,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:59:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:59:14,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:59:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:59:14,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:59:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:59:14,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:59:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:59:14,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:59:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:59:14,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 03:59:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:59:14,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-16 03:59:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:59:14,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:59:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:59:14,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:59:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:59:14,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:59:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:59:14,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:59:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:59:14,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:59:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:59:14,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 03:59:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:59:14,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-16 03:59:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:59:14,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-02-16 03:59:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:59:14,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-16 03:59:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:59:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 843 proven. 224 refuted. 0 times theorem prover too weak. 1465 trivial. 0 not checked. [2023-02-16 03:59:14,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:59:14,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539623246] [2023-02-16 03:59:14,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539623246] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:59:14,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728991178] [2023-02-16 03:59:14,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:59:14,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:59:14,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:59:14,313 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) [2023-02-16 03:59:14,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-16 03:59:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:59:14,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-16 03:59:14,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:59:14,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 832 proven. 216 refuted. 0 times theorem prover too weak. 1484 trivial. 0 not checked. [2023-02-16 03:59:14,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:59:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 848 proven. 263 refuted. 0 times theorem prover too weak. 1421 trivial. 0 not checked. [2023-02-16 03:59:16,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728991178] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:59:16,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:59:16,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 21] total 28 [2023-02-16 03:59:16,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418696297] [2023-02-16 03:59:16,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:59:16,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-16 03:59:16,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:59:16,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-16 03:59:16,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2023-02-16 03:59:16,535 INFO L87 Difference]: Start difference. First operand 81553 states and 127861 transitions. Second operand has 28 states, 28 states have (on average 4.464285714285714) internal successors, (125), 25 states have internal predecessors, (125), 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)