./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 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/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-?-3598765 [2022-07-22 00:40:37,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 00:40:37,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 00:40:37,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 00:40:37,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 00:40:37,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 00:40:37,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 00:40:37,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 00:40:37,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 00:40:37,086 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 00:40:37,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 00:40:37,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 00:40:37,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 00:40:37,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 00:40:37,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 00:40:37,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 00:40:37,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 00:40:37,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 00:40:37,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 00:40:37,102 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 00:40:37,103 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 00:40:37,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 00:40:37,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 00:40:37,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 00:40:37,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 00:40:37,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 00:40:37,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 00:40:37,113 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 00:40:37,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 00:40:37,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 00:40:37,114 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 00:40:37,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 00:40:37,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 00:40:37,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 00:40:37,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 00:40:37,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 00:40:37,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 00:40:37,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 00:40:37,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 00:40:37,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 00:40:37,120 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 00:40:37,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 00:40:37,125 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-07-22 00:40:37,148 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 00:40:37,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 00:40:37,149 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 00:40:37,149 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 00:40:37,150 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 00:40:37,150 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 00:40:37,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 00:40:37,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 00:40:37,151 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 00:40:37,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 00:40:37,156 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 00:40:37,156 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-22 00:40:37,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 00:40:37,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 00:40:37,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 00:40:37,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 00:40:37,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 00:40:37,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 00:40:37,157 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-07-22 00:40:37,158 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 00:40:37,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 00:40:37,158 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 00:40:37,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 00:40:37,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 00:40:37,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 00:40:37,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 00:40:37,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 00:40:37,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 00:40:37,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 00:40:37,159 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 00:40:37,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 00:40:37,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 00:40:37,160 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 00:40:37,160 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd [2022-07-22 00:40:37,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 00:40:37,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 00:40:37,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 00:40:37,455 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 00:40:37,455 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 00:40:37,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann03.c [2022-07-22 00:40:37,508 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d46ce8a3/69b1e934117a4007aac4a2cf9818a4f6/FLAGe747842dd [2022-07-22 00:40:37,841 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 00:40:37,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann03.c [2022-07-22 00:40:37,846 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d46ce8a3/69b1e934117a4007aac4a2cf9818a4f6/FLAGe747842dd [2022-07-22 00:40:38,270 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d46ce8a3/69b1e934117a4007aac4a2cf9818a4f6 [2022-07-22 00:40:38,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 00:40:38,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 00:40:38,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 00:40:38,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 00:40:38,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 00:40:38,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:40:38" (1/1) ... [2022-07-22 00:40:38,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62442c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:38, skipping insertion in model container [2022-07-22 00:40:38,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:40:38" (1/1) ... [2022-07-22 00:40:38,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 00:40:38,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 00:40:38,389 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann03.c[1168,1181] [2022-07-22 00:40:38,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 00:40:38,398 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 00:40:38,417 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann03.c[1168,1181] [2022-07-22 00:40:38,417 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 00:40:38,438 INFO L208 MainTranslator]: Completed translation [2022-07-22 00:40:38,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:38 WrapperNode [2022-07-22 00:40:38,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 00:40:38,440 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 00:40:38,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 00:40:38,448 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 00:40:38,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:38" (1/1) ... [2022-07-22 00:40:38,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:38" (1/1) ... [2022-07-22 00:40:38,478 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-07-22 00:40:38,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 00:40:38,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 00:40:38,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 00:40:38,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 00:40:38,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:38" (1/1) ... [2022-07-22 00:40:38,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:38" (1/1) ... [2022-07-22 00:40:38,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:38" (1/1) ... [2022-07-22 00:40:38,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:38" (1/1) ... [2022-07-22 00:40:38,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:38" (1/1) ... [2022-07-22 00:40:38,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:38" (1/1) ... [2022-07-22 00:40:38,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:38" (1/1) ... [2022-07-22 00:40:38,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 00:40:38,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 00:40:38,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 00:40:38,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 00:40:38,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:38" (1/1) ... [2022-07-22 00:40:38,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 00:40:38,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:38,537 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 00:40:38,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 00:40:38,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 00:40:38,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 00:40:38,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 00:40:38,581 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-07-22 00:40:38,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-07-22 00:40:38,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 00:40:38,628 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 00:40:38,629 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 00:40:38,788 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 00:40:38,792 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 00:40:38,792 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 00:40:38,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:40:38 BoogieIcfgContainer [2022-07-22 00:40:38,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 00:40:38,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 00:40:38,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 00:40:38,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 00:40:38,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:40:38" (1/3) ... [2022-07-22 00:40:38,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fdbb1b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:40:38, skipping insertion in model container [2022-07-22 00:40:38,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:40:38" (2/3) ... [2022-07-22 00:40:38,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fdbb1b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:40:38, skipping insertion in model container [2022-07-22 00:40:38,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:40:38" (3/3) ... [2022-07-22 00:40:38,799 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2022-07-22 00:40:38,825 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 00:40:38,825 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-07-22 00:40:38,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 00:40:38,882 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@46abefd3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2b3d1263 [2022-07-22 00:40:38,882 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-22 00:40:38,886 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 00:40:38,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-22 00:40:38,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:38,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:38,901 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:38,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:38,909 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2022-07-22 00:40:38,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:38,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476981930] [2022-07-22 00:40:38,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:38,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:39,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:39,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476981930] [2022-07-22 00:40:39,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476981930] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:40:39,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:40:39,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:40:39,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983749030] [2022-07-22 00:40:39,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:40:39,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:40:39,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:39,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:40:39,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:40:39,083 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:39,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:39,184 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2022-07-22 00:40:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 00:40:39,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-22 00:40:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:39,193 INFO L225 Difference]: With dead ends: 73 [2022-07-22 00:40:39,193 INFO L226 Difference]: Without dead ends: 59 [2022-07-22 00:40:39,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 00:40:39,198 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 55 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:39,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 119 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:40:39,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-22 00:40:39,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2022-07-22 00:40:39,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 42 states have internal predecessors, (52), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 00:40:39,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-07-22 00:40:39,240 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2022-07-22 00:40:39,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:39,241 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-07-22 00:40:39,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:39,241 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-07-22 00:40:39,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 00:40:39,242 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:39,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:39,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 00:40:39,248 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:39,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:39,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2022-07-22 00:40:39,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:39,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985655224] [2022-07-22 00:40:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:39,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:39,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:39,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985655224] [2022-07-22 00:40:39,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985655224] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:40:39,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:40:39,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:40:39,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708012824] [2022-07-22 00:40:39,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:40:39,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:40:39,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:39,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:40:39,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:40:39,290 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:39,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:39,325 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-07-22 00:40:39,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 00:40:39,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-22 00:40:39,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:39,327 INFO L225 Difference]: With dead ends: 51 [2022-07-22 00:40:39,327 INFO L226 Difference]: Without dead ends: 49 [2022-07-22 00:40:39,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 00:40:39,328 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:39,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:40:39,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-22 00:40:39,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-22 00:40:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.411764705882353) internal successors, (48), 40 states have internal predecessors, (48), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 00:40:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-07-22 00:40:39,342 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2022-07-22 00:40:39,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:39,343 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-07-22 00:40:39,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-07-22 00:40:39,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 00:40:39,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:39,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:39,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 00:40:39,347 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:39,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:39,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2022-07-22 00:40:39,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:39,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510712418] [2022-07-22 00:40:39,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:39,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:39,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:39,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510712418] [2022-07-22 00:40:39,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510712418] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:40:39,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:40:39,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:40:39,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022351689] [2022-07-22 00:40:39,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:40:39,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:40:39,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:39,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:40:39,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:40:39,393 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:39,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:39,445 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2022-07-22 00:40:39,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 00:40:39,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-22 00:40:39,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:39,457 INFO L225 Difference]: With dead ends: 76 [2022-07-22 00:40:39,457 INFO L226 Difference]: Without dead ends: 75 [2022-07-22 00:40:39,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 00:40:39,459 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 43 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:39,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 87 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:40:39,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-22 00:40:39,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2022-07-22 00:40:39,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 55 states have internal predecessors, (68), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 00:40:39,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-07-22 00:40:39,485 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 9 [2022-07-22 00:40:39,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:39,485 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-07-22 00:40:39,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:39,486 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-07-22 00:40:39,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 00:40:39,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:39,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:39,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 00:40:39,487 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:39,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:39,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2022-07-22 00:40:39,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:39,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282476051] [2022-07-22 00:40:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:39,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:39,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:39,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282476051] [2022-07-22 00:40:39,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282476051] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:40:39,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:40:39,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:40:39,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085169284] [2022-07-22 00:40:39,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:40:39,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:40:39,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:39,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:40:39,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:40:39,536 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:39,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:39,599 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2022-07-22 00:40:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 00:40:39,599 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-22 00:40:39,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:39,601 INFO L225 Difference]: With dead ends: 116 [2022-07-22 00:40:39,601 INFO L226 Difference]: Without dead ends: 108 [2022-07-22 00:40:39,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 00:40:39,602 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 39 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:39,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 85 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:40:39,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-22 00:40:39,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-07-22 00:40:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.337837837837838) internal successors, (99), 81 states have internal predecessors, (99), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 00:40:39,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2022-07-22 00:40:39,618 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 10 [2022-07-22 00:40:39,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:39,619 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2022-07-22 00:40:39,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:39,619 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2022-07-22 00:40:39,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-22 00:40:39,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:39,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:39,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 00:40:39,620 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:39,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:39,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1072007509, now seen corresponding path program 1 times [2022-07-22 00:40:39,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:39,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051265477] [2022-07-22 00:40:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:39,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:39,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:39,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051265477] [2022-07-22 00:40:39,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051265477] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:40:39,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:40:39,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:40:39,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098834091] [2022-07-22 00:40:39,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:40:39,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:40:39,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:39,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:40:39,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:40:39,652 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:39,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:39,704 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2022-07-22 00:40:39,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 00:40:39,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-22 00:40:39,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:39,706 INFO L225 Difference]: With dead ends: 109 [2022-07-22 00:40:39,706 INFO L226 Difference]: Without dead ends: 108 [2022-07-22 00:40:39,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 00:40:39,708 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:39,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 92 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:40:39,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-22 00:40:39,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-07-22 00:40:39,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 81 states have internal predecessors, (97), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 00:40:39,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2022-07-22 00:40:39,733 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 12 [2022-07-22 00:40:39,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:39,734 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2022-07-22 00:40:39,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:39,734 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2022-07-22 00:40:39,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 00:40:39,735 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:39,735 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:39,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 00:40:39,735 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:39,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:39,736 INFO L85 PathProgramCache]: Analyzing trace with hash 219392943, now seen corresponding path program 1 times [2022-07-22 00:40:39,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:39,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579741138] [2022-07-22 00:40:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:39,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:39,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:39,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579741138] [2022-07-22 00:40:39,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579741138] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:40:39,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:40:39,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:40:39,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237138726] [2022-07-22 00:40:39,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:40:39,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:40:39,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:39,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:40:39,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:40:39,810 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:39,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:39,885 INFO L93 Difference]: Finished difference Result 174 states and 233 transitions. [2022-07-22 00:40:39,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 00:40:39,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-22 00:40:39,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:39,886 INFO L225 Difference]: With dead ends: 174 [2022-07-22 00:40:39,886 INFO L226 Difference]: Without dead ends: 103 [2022-07-22 00:40:39,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:40:39,901 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 30 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:39,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 77 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:40:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-22 00:40:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2022-07-22 00:40:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.295774647887324) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-22 00:40:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2022-07-22 00:40:39,920 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 16 [2022-07-22 00:40:39,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:39,921 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2022-07-22 00:40:39,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:39,921 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2022-07-22 00:40:39,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 00:40:39,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:39,922 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:39,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 00:40:39,922 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:39,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:39,923 INFO L85 PathProgramCache]: Analyzing trace with hash 219399894, now seen corresponding path program 1 times [2022-07-22 00:40:39,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:39,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852925728] [2022-07-22 00:40:39,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:39,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:40,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:40,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852925728] [2022-07-22 00:40:40,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852925728] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:40,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333437917] [2022-07-22 00:40:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:40,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:40,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:40,018 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:40,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 00:40:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:40,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 00:40:40,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:40,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:40,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333437917] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:40,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:40,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-22 00:40:40,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475883136] [2022-07-22 00:40:40,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:40,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 00:40:40,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:40,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 00:40:40,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-22 00:40:40,215 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:40,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:40,421 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2022-07-22 00:40:40,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 00:40:40,422 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-22 00:40:40,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:40,428 INFO L225 Difference]: With dead ends: 274 [2022-07-22 00:40:40,428 INFO L226 Difference]: Without dead ends: 272 [2022-07-22 00:40:40,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-07-22 00:40:40,437 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 217 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:40,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 193 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:40:40,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-07-22 00:40:40,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2022-07-22 00:40:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 182 states have (on average 1.2637362637362637) internal successors, (230), 189 states have internal predecessors, (230), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-22 00:40:40,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2022-07-22 00:40:40,482 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 16 [2022-07-22 00:40:40,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:40,482 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2022-07-22 00:40:40,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:40,483 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2022-07-22 00:40:40,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-22 00:40:40,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:40,483 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:40,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 00:40:40,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:40,698 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:40,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:40,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1162887243, now seen corresponding path program 1 times [2022-07-22 00:40:40,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:40,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455523527] [2022-07-22 00:40:40,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:40,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:40,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:40,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455523527] [2022-07-22 00:40:40,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455523527] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:40,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48134183] [2022-07-22 00:40:40,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:40,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:40,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:40,746 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:40,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 00:40:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:40,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 00:40:40,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:40,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:40:40,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48134183] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:40:40,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 00:40:40,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-07-22 00:40:40,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810676602] [2022-07-22 00:40:40,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:40:40,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:40:40,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:40,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:40:40,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-22 00:40:40,824 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:40,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:40,896 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2022-07-22 00:40:40,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 00:40:40,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-22 00:40:40,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:40,901 INFO L225 Difference]: With dead ends: 328 [2022-07-22 00:40:40,901 INFO L226 Difference]: Without dead ends: 327 [2022-07-22 00:40:40,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-22 00:40:40,904 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 40 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:40,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 100 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:40:40,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-07-22 00:40:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2022-07-22 00:40:40,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 227 states have (on average 1.2599118942731278) internal successors, (286), 234 states have internal predecessors, (286), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-07-22 00:40:40,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2022-07-22 00:40:40,939 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 17 [2022-07-22 00:40:40,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:40,939 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2022-07-22 00:40:40,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:40,939 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2022-07-22 00:40:40,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 00:40:40,941 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:40,941 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:40,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:41,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-22 00:40:41,156 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:41,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:41,157 INFO L85 PathProgramCache]: Analyzing trace with hash 523262015, now seen corresponding path program 1 times [2022-07-22 00:40:41,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:41,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387615732] [2022-07-22 00:40:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:41,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:41,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:41,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387615732] [2022-07-22 00:40:41,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387615732] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:41,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669450842] [2022-07-22 00:40:41,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:41,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:41,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:41,228 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:41,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 00:40:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:41,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 00:40:41,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:41,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:41,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669450842] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:41,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:41,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-22 00:40:41,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937459717] [2022-07-22 00:40:41,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:41,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 00:40:41,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:41,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 00:40:41,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-22 00:40:41,343 INFO L87 Difference]: Start difference. First operand 293 states and 373 transitions. Second operand has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:41,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:41,544 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2022-07-22 00:40:41,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 00:40:41,545 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-22 00:40:41,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:41,547 INFO L225 Difference]: With dead ends: 591 [2022-07-22 00:40:41,547 INFO L226 Difference]: Without dead ends: 590 [2022-07-22 00:40:41,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-07-22 00:40:41,549 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 240 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:41,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 157 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:40:41,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-07-22 00:40:41,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2022-07-22 00:40:41,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.203931203931204) internal successors, (490), 414 states have internal predecessors, (490), 81 states have call successors, (81), 28 states have call predecessors, (81), 27 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-07-22 00:40:41,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2022-07-22 00:40:41,579 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 20 [2022-07-22 00:40:41,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:41,579 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2022-07-22 00:40:41,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:41,579 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2022-07-22 00:40:41,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 00:40:41,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:41,580 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:41,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:41,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:41,797 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:41,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:41,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2022-07-22 00:40:41,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:41,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660692192] [2022-07-22 00:40:41,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:41,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:41,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 00:40:41,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:41,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660692192] [2022-07-22 00:40:41,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660692192] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:41,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718123879] [2022-07-22 00:40:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:41,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:41,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:41,844 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:41,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 00:40:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:41,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 00:40:41,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 00:40:41,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 00:40:42,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718123879] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:42,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:42,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-07-22 00:40:42,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345351695] [2022-07-22 00:40:42,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:42,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 00:40:42,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:42,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 00:40:42,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-07-22 00:40:42,085 INFO L87 Difference]: Start difference. First operand 521 states and 649 transitions. Second operand has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 00:40:42,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:42,582 INFO L93 Difference]: Finished difference Result 1286 states and 1798 transitions. [2022-07-22 00:40:42,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 00:40:42,583 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2022-07-22 00:40:42,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:42,586 INFO L225 Difference]: With dead ends: 1286 [2022-07-22 00:40:42,587 INFO L226 Difference]: Without dead ends: 895 [2022-07-22 00:40:42,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 00:40:42,590 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 220 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:42,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 93 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:40:42,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-07-22 00:40:42,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 701. [2022-07-22 00:40:42,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 547 states have (on average 1.1956124314442413) internal successors, (654), 571 states have internal predecessors, (654), 102 states have call successors, (102), 44 states have call predecessors, (102), 46 states have return successors, (106), 85 states have call predecessors, (106), 78 states have call successors, (106) [2022-07-22 00:40:42,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 862 transitions. [2022-07-22 00:40:42,639 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 862 transitions. Word has length 24 [2022-07-22 00:40:42,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:42,639 INFO L495 AbstractCegarLoop]: Abstraction has 701 states and 862 transitions. [2022-07-22 00:40:42,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 00:40:42,639 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 862 transitions. [2022-07-22 00:40:42,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 00:40:42,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:42,640 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:42,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 00:40:42,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:42,857 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:42,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:42,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1583952330, now seen corresponding path program 1 times [2022-07-22 00:40:42,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:42,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662337421] [2022-07-22 00:40:42,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:42,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:42,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:42,901 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 00:40:42,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:42,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662337421] [2022-07-22 00:40:42,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662337421] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:42,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563143327] [2022-07-22 00:40:42,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:42,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:42,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:42,903 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:42,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 00:40:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:42,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 00:40:42,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 00:40:42,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 00:40:43,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563143327] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:43,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 00:40:43,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2022-07-22 00:40:43,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632116965] [2022-07-22 00:40:43,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:40:43,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 00:40:43,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:43,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 00:40:43,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-22 00:40:43,046 INFO L87 Difference]: Start difference. First operand 701 states and 862 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 00:40:43,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:43,179 INFO L93 Difference]: Finished difference Result 776 states and 987 transitions. [2022-07-22 00:40:43,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 00:40:43,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-07-22 00:40:43,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:43,183 INFO L225 Difference]: With dead ends: 776 [2022-07-22 00:40:43,183 INFO L226 Difference]: Without dead ends: 775 [2022-07-22 00:40:43,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-07-22 00:40:43,184 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 65 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:43,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 101 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:40:43,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-07-22 00:40:43,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 722. [2022-07-22 00:40:43,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 568 states have (on average 1.1971830985915493) internal successors, (680), 589 states have internal predecessors, (680), 102 states have call successors, (102), 47 states have call predecessors, (102), 46 states have return successors, (106), 85 states have call predecessors, (106), 78 states have call successors, (106) [2022-07-22 00:40:43,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 888 transitions. [2022-07-22 00:40:43,224 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 888 transitions. Word has length 28 [2022-07-22 00:40:43,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:43,225 INFO L495 AbstractCegarLoop]: Abstraction has 722 states and 888 transitions. [2022-07-22 00:40:43,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 00:40:43,225 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 888 transitions. [2022-07-22 00:40:43,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 00:40:43,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:43,226 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:43,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:43,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 00:40:43,443 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:43,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:43,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1777813581, now seen corresponding path program 1 times [2022-07-22 00:40:43,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:43,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914801402] [2022-07-22 00:40:43,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:43,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:43,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:43,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:43,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:43,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914801402] [2022-07-22 00:40:43,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914801402] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:43,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715785655] [2022-07-22 00:40:43,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:43,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:43,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:43,516 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:43,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 00:40:43,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:43,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 00:40:43,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:43,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:43,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715785655] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:43,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:43,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-07-22 00:40:43,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350540057] [2022-07-22 00:40:43,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:43,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 00:40:43,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:43,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 00:40:43,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-22 00:40:43,712 INFO L87 Difference]: Start difference. First operand 722 states and 888 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 00:40:44,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:44,166 INFO L93 Difference]: Finished difference Result 1150 states and 1701 transitions. [2022-07-22 00:40:44,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 00:40:44,167 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-07-22 00:40:44,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:44,172 INFO L225 Difference]: With dead ends: 1150 [2022-07-22 00:40:44,172 INFO L226 Difference]: Without dead ends: 1148 [2022-07-22 00:40:44,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2022-07-22 00:40:44,174 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 147 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:44,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 209 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:40:44,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-07-22 00:40:44,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 976. [2022-07-22 00:40:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 736 states have (on average 1.1875) internal successors, (874), 768 states have internal predecessors, (874), 151 states have call successors, (151), 54 states have call predecessors, (151), 83 states have return successors, (294), 153 states have call predecessors, (294), 126 states have call successors, (294) [2022-07-22 00:40:44,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1319 transitions. [2022-07-22 00:40:44,230 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1319 transitions. Word has length 33 [2022-07-22 00:40:44,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:44,230 INFO L495 AbstractCegarLoop]: Abstraction has 976 states and 1319 transitions. [2022-07-22 00:40:44,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 00:40:44,230 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1319 transitions. [2022-07-22 00:40:44,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-22 00:40:44,231 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:44,231 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:44,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:44,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:44,448 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:44,448 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2022-07-22 00:40:44,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:44,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555267773] [2022-07-22 00:40:44,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:44,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:44,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:44,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:44,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:44,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555267773] [2022-07-22 00:40:44,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555267773] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:44,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523898987] [2022-07-22 00:40:44,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:44,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:44,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:44,538 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:44,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 00:40:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:44,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 00:40:44,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:44,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:44,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523898987] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:44,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 00:40:44,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2022-07-22 00:40:44,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672002305] [2022-07-22 00:40:44,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:40:44,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 00:40:44,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:44,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 00:40:44,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-07-22 00:40:44,765 INFO L87 Difference]: Start difference. First operand 976 states and 1319 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 00:40:44,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:44,929 INFO L93 Difference]: Finished difference Result 1019 states and 1361 transitions. [2022-07-22 00:40:44,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 00:40:44,930 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2022-07-22 00:40:44,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:44,934 INFO L225 Difference]: With dead ends: 1019 [2022-07-22 00:40:44,934 INFO L226 Difference]: Without dead ends: 1018 [2022-07-22 00:40:44,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-07-22 00:40:44,935 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 62 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:44,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 127 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:40:44,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-07-22 00:40:44,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 975. [2022-07-22 00:40:44,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 736 states have (on average 1.1766304347826086) internal successors, (866), 767 states have internal predecessors, (866), 151 states have call successors, (151), 54 states have call predecessors, (151), 83 states have return successors, (294), 153 states have call predecessors, (294), 126 states have call successors, (294) [2022-07-22 00:40:44,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1311 transitions. [2022-07-22 00:40:44,994 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1311 transitions. Word has length 34 [2022-07-22 00:40:44,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:44,994 INFO L495 AbstractCegarLoop]: Abstraction has 975 states and 1311 transitions. [2022-07-22 00:40:44,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 00:40:44,994 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1311 transitions. [2022-07-22 00:40:44,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 00:40:44,996 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:44,996 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:45,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:45,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:45,212 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:45,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:45,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1227703372, now seen corresponding path program 2 times [2022-07-22 00:40:45,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:45,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879021897] [2022-07-22 00:40:45,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:45,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:45,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 00:40:45,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:45,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879021897] [2022-07-22 00:40:45,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879021897] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:45,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524776689] [2022-07-22 00:40:45,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 00:40:45,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:45,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:45,282 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:45,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 00:40:45,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 00:40:45,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:40:45,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 00:40:45,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 00:40:45,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 00:40:45,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524776689] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:45,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:45,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 00:40:45,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250349957] [2022-07-22 00:40:45,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:45,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 00:40:45,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:45,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 00:40:45,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-22 00:40:45,495 INFO L87 Difference]: Start difference. First operand 975 states and 1311 transitions. Second operand has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 00:40:45,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:45,807 INFO L93 Difference]: Finished difference Result 1182 states and 1575 transitions. [2022-07-22 00:40:45,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 00:40:45,808 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-07-22 00:40:45,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:45,813 INFO L225 Difference]: With dead ends: 1182 [2022-07-22 00:40:45,813 INFO L226 Difference]: Without dead ends: 1181 [2022-07-22 00:40:45,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=754, Unknown=0, NotChecked=0, Total=992 [2022-07-22 00:40:45,816 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 210 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:45,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 176 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:40:45,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-07-22 00:40:45,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1029. [2022-07-22 00:40:45,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 779 states have (on average 1.177150192554557) internal successors, (917), 806 states have internal predecessors, (917), 162 states have call successors, (162), 61 states have call predecessors, (162), 83 states have return successors, (294), 161 states have call predecessors, (294), 126 states have call successors, (294) [2022-07-22 00:40:45,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1373 transitions. [2022-07-22 00:40:45,885 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1373 transitions. Word has length 36 [2022-07-22 00:40:45,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:45,885 INFO L495 AbstractCegarLoop]: Abstraction has 1029 states and 1373 transitions. [2022-07-22 00:40:45,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 00:40:45,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1373 transitions. [2022-07-22 00:40:45,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 00:40:45,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:45,887 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:45,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:46,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 00:40:46,104 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:46,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:46,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1699542727, now seen corresponding path program 1 times [2022-07-22 00:40:46,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:46,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001336661] [2022-07-22 00:40:46,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:46,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:46,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:46,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:46,168 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:46,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:46,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001336661] [2022-07-22 00:40:46,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001336661] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:46,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435546151] [2022-07-22 00:40:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:46,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:46,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:46,185 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:46,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 00:40:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:46,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 00:40:46,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:46,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:46,417 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:46,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435546151] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:46,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 00:40:46,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2022-07-22 00:40:46,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62156155] [2022-07-22 00:40:46,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:40:46,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 00:40:46,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:46,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 00:40:46,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-07-22 00:40:46,419 INFO L87 Difference]: Start difference. First operand 1029 states and 1373 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 00:40:46,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:46,630 INFO L93 Difference]: Finished difference Result 1140 states and 1577 transitions. [2022-07-22 00:40:46,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 00:40:46,630 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-07-22 00:40:46,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:46,634 INFO L225 Difference]: With dead ends: 1140 [2022-07-22 00:40:46,635 INFO L226 Difference]: Without dead ends: 1139 [2022-07-22 00:40:46,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-07-22 00:40:46,637 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 65 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:46,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 159 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:40:46,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-07-22 00:40:46,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1037. [2022-07-22 00:40:46,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 787 states have (on average 1.1715374841168995) internal successors, (922), 810 states have internal predecessors, (922), 166 states have call successors, (166), 61 states have call predecessors, (166), 79 states have return successors, (234), 165 states have call predecessors, (234), 130 states have call successors, (234) [2022-07-22 00:40:46,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1322 transitions. [2022-07-22 00:40:46,706 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1322 transitions. Word has length 37 [2022-07-22 00:40:46,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:46,707 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 1322 transitions. [2022-07-22 00:40:46,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 00:40:46,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1322 transitions. [2022-07-22 00:40:46,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 00:40:46,709 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:46,709 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:46,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:46,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 00:40:46,925 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:46,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:46,925 INFO L85 PathProgramCache]: Analyzing trace with hash -151680771, now seen corresponding path program 2 times [2022-07-22 00:40:46,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:46,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782562032] [2022-07-22 00:40:46,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:46,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:46,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:46,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782562032] [2022-07-22 00:40:46,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782562032] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:46,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929376392] [2022-07-22 00:40:46,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 00:40:46,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:46,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:46,995 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:47,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 00:40:47,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 00:40:47,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:40:47,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 00:40:47,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:47,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:40:47,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929376392] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:47,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:47,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-07-22 00:40:47,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853341192] [2022-07-22 00:40:47,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:47,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 00:40:47,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:47,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 00:40:47,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-07-22 00:40:47,191 INFO L87 Difference]: Start difference. First operand 1037 states and 1322 transitions. Second operand has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:47,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:47,681 INFO L93 Difference]: Finished difference Result 2055 states and 2762 transitions. [2022-07-22 00:40:47,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-22 00:40:47,682 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-22 00:40:47,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:47,688 INFO L225 Difference]: With dead ends: 2055 [2022-07-22 00:40:47,688 INFO L226 Difference]: Without dead ends: 2054 [2022-07-22 00:40:47,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 00:40:47,689 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 418 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:47,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 513 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 00:40:47,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2022-07-22 00:40:47,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1759. [2022-07-22 00:40:47,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1326 states have (on average 1.1463046757164403) internal successors, (1520), 1378 states have internal predecessors, (1520), 274 states have call successors, (274), 95 states have call predecessors, (274), 154 states have return successors, (409), 285 states have call predecessors, (409), 226 states have call successors, (409) [2022-07-22 00:40:47,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 2203 transitions. [2022-07-22 00:40:47,796 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 2203 transitions. Word has length 44 [2022-07-22 00:40:47,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:47,796 INFO L495 AbstractCegarLoop]: Abstraction has 1759 states and 2203 transitions. [2022-07-22 00:40:47,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:47,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 2203 transitions. [2022-07-22 00:40:47,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 00:40:47,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:47,798 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:47,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:48,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 00:40:48,014 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:48,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:48,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1560392739, now seen corresponding path program 2 times [2022-07-22 00:40:48,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:48,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781257651] [2022-07-22 00:40:48,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:48,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:48,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:48,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:48,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:48,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781257651] [2022-07-22 00:40:48,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781257651] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:48,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345969922] [2022-07-22 00:40:48,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 00:40:48,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:48,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:48,093 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:48,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 00:40:48,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 00:40:48,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:40:48,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 00:40:48,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:48,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:40:48,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345969922] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:48,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:48,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-07-22 00:40:48,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15209431] [2022-07-22 00:40:48,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:48,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 00:40:48,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:48,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 00:40:48,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-07-22 00:40:48,322 INFO L87 Difference]: Start difference. First operand 1759 states and 2203 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 00:40:49,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:49,324 INFO L93 Difference]: Finished difference Result 3798 states and 5493 transitions. [2022-07-22 00:40:49,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-22 00:40:49,324 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 45 [2022-07-22 00:40:49,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:49,333 INFO L225 Difference]: With dead ends: 3798 [2022-07-22 00:40:49,333 INFO L226 Difference]: Without dead ends: 2636 [2022-07-22 00:40:49,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 00:40:49,340 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 230 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:49,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 315 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 00:40:49,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2022-07-22 00:40:49,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 1939. [2022-07-22 00:40:49,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1464 states have (on average 1.1400273224043715) internal successors, (1669), 1522 states have internal predecessors, (1669), 298 states have call successors, (298), 109 states have call predecessors, (298), 172 states have return successors, (443), 307 states have call predecessors, (443), 245 states have call successors, (443) [2022-07-22 00:40:49,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 2410 transitions. [2022-07-22 00:40:49,464 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 2410 transitions. Word has length 45 [2022-07-22 00:40:49,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:49,464 INFO L495 AbstractCegarLoop]: Abstraction has 1939 states and 2410 transitions. [2022-07-22 00:40:49,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 00:40:49,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 2410 transitions. [2022-07-22 00:40:49,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 00:40:49,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:49,466 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:49,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:49,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 00:40:49,683 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:49,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:49,684 INFO L85 PathProgramCache]: Analyzing trace with hash -242379077, now seen corresponding path program 1 times [2022-07-22 00:40:49,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:49,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689611398] [2022-07-22 00:40:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:49,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:49,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 00:40:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 00:40:49,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:49,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689611398] [2022-07-22 00:40:49,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689611398] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:49,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362711453] [2022-07-22 00:40:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:49,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:49,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:49,723 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:49,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 00:40:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:49,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 00:40:49,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:49,824 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 00:40:49,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 00:40:49,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362711453] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:49,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:49,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-07-22 00:40:49,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21838651] [2022-07-22 00:40:49,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:49,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 00:40:49,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:49,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 00:40:49,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-07-22 00:40:49,901 INFO L87 Difference]: Start difference. First operand 1939 states and 2410 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 00:40:50,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:50,467 INFO L93 Difference]: Finished difference Result 2482 states and 3263 transitions. [2022-07-22 00:40:50,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 00:40:50,467 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-07-22 00:40:50,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:50,474 INFO L225 Difference]: With dead ends: 2482 [2022-07-22 00:40:50,474 INFO L226 Difference]: Without dead ends: 2379 [2022-07-22 00:40:50,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 00:40:50,476 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 189 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:50,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 80 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:40:50,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2022-07-22 00:40:50,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 1873. [2022-07-22 00:40:50,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1411 states have (on average 1.133238837703756) internal successors, (1599), 1473 states have internal predecessors, (1599), 286 states have call successors, (286), 102 states have call predecessors, (286), 172 states have return successors, (443), 297 states have call predecessors, (443), 245 states have call successors, (443) [2022-07-22 00:40:50,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 2328 transitions. [2022-07-22 00:40:50,596 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 2328 transitions. Word has length 52 [2022-07-22 00:40:50,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:50,596 INFO L495 AbstractCegarLoop]: Abstraction has 1873 states and 2328 transitions. [2022-07-22 00:40:50,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 00:40:50,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 2328 transitions. [2022-07-22 00:40:50,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 00:40:50,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:50,597 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:50,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:50,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 00:40:50,815 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:50,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:50,815 INFO L85 PathProgramCache]: Analyzing trace with hash 442862615, now seen corresponding path program 1 times [2022-07-22 00:40:50,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:50,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409229827] [2022-07-22 00:40:50,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:50,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:50,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:50,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:40:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:50,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:50,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 00:40:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 00:40:50,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:50,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409229827] [2022-07-22 00:40:50,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409229827] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:50,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737764057] [2022-07-22 00:40:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:50,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:50,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:50,956 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:50,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 00:40:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:50,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 00:40:50,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-22 00:40:51,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 00:40:51,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737764057] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:51,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:51,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-07-22 00:40:51,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498606540] [2022-07-22 00:40:51,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:51,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 00:40:51,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:51,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 00:40:51,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-07-22 00:40:51,438 INFO L87 Difference]: Start difference. First operand 1873 states and 2328 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-22 00:40:52,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:52,767 INFO L93 Difference]: Finished difference Result 4363 states and 7674 transitions. [2022-07-22 00:40:52,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-22 00:40:52,768 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 52 [2022-07-22 00:40:52,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:52,789 INFO L225 Difference]: With dead ends: 4363 [2022-07-22 00:40:52,790 INFO L226 Difference]: Without dead ends: 4361 [2022-07-22 00:40:52,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2022-07-22 00:40:52,795 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 171 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:52,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 219 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 00:40:52,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2022-07-22 00:40:53,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 3183. [2022-07-22 00:40:53,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3183 states, 2230 states have (on average 1.1031390134529149) internal successors, (2460), 2295 states have internal predecessors, (2460), 551 states have call successors, (551), 116 states have call predecessors, (551), 398 states have return successors, (3128), 771 states have call predecessors, (3128), 508 states have call successors, (3128) [2022-07-22 00:40:53,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 6139 transitions. [2022-07-22 00:40:53,047 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 6139 transitions. Word has length 52 [2022-07-22 00:40:53,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:53,048 INFO L495 AbstractCegarLoop]: Abstraction has 3183 states and 6139 transitions. [2022-07-22 00:40:53,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-22 00:40:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 6139 transitions. [2022-07-22 00:40:53,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 00:40:53,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:53,050 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:53,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:53,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:53,263 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:53,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:53,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1812635000, now seen corresponding path program 3 times [2022-07-22 00:40:53,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:53,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743358766] [2022-07-22 00:40:53,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:53,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:53,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 00:40:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 75 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 00:40:53,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:53,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743358766] [2022-07-22 00:40:53,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743358766] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:53,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448829347] [2022-07-22 00:40:53,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 00:40:53,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:53,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:53,365 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:53,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 00:40:53,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-22 00:40:53,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:40:53,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 00:40:53,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 75 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 00:40:53,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 00:40:53,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448829347] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:53,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:53,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-07-22 00:40:53,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047646940] [2022-07-22 00:40:53,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:53,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 00:40:53,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:53,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 00:40:53,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-07-22 00:40:53,671 INFO L87 Difference]: Start difference. First operand 3183 states and 6139 transitions. Second operand has 27 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 19 states have internal predecessors, (77), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 00:40:54,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:54,303 INFO L93 Difference]: Finished difference Result 3643 states and 6775 transitions. [2022-07-22 00:40:54,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 00:40:54,303 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 19 states have internal predecessors, (77), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-07-22 00:40:54,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:54,319 INFO L225 Difference]: With dead ends: 3643 [2022-07-22 00:40:54,320 INFO L226 Difference]: Without dead ends: 3642 [2022-07-22 00:40:54,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=634, Invalid=1916, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 00:40:54,322 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 398 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:54,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 196 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:40:54,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3642 states. [2022-07-22 00:40:54,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3642 to 3211. [2022-07-22 00:40:54,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3211 states, 2253 states have (on average 1.1034176653351087) internal successors, (2486), 2318 states have internal predecessors, (2486), 556 states have call successors, (556), 119 states have call predecessors, (556), 398 states have return successors, (3128), 773 states have call predecessors, (3128), 508 states have call successors, (3128) [2022-07-22 00:40:54,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3211 states to 3211 states and 6170 transitions. [2022-07-22 00:40:54,568 INFO L78 Accepts]: Start accepts. Automaton has 3211 states and 6170 transitions. Word has length 52 [2022-07-22 00:40:54,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:54,569 INFO L495 AbstractCegarLoop]: Abstraction has 3211 states and 6170 transitions. [2022-07-22 00:40:54,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 19 states have internal predecessors, (77), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 00:40:54,569 INFO L276 IsEmpty]: Start isEmpty. Operand 3211 states and 6170 transitions. [2022-07-22 00:40:54,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-22 00:40:54,571 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:54,571 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:54,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:54,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:54,787 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:54,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:54,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1991697283, now seen corresponding path program 1 times [2022-07-22 00:40:54,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:54,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141248365] [2022-07-22 00:40:54,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:54,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 00:40:54,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:54,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141248365] [2022-07-22 00:40:54,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141248365] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:54,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156575727] [2022-07-22 00:40:54,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:54,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:54,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:54,867 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:54,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 00:40:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:54,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 00:40:54,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 00:40:54,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 00:40:55,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156575727] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:55,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:55,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-07-22 00:40:55,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659575265] [2022-07-22 00:40:55,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:55,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 00:40:55,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:55,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 00:40:55,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-07-22 00:40:55,102 INFO L87 Difference]: Start difference. First operand 3211 states and 6170 transitions. Second operand has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:56,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:40:56,084 INFO L93 Difference]: Finished difference Result 9377 states and 17636 transitions. [2022-07-22 00:40:56,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-22 00:40:56,085 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-22 00:40:56,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:40:56,130 INFO L225 Difference]: With dead ends: 9377 [2022-07-22 00:40:56,131 INFO L226 Difference]: Without dead ends: 9376 [2022-07-22 00:40:56,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 00:40:56,136 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 676 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 00:40:56,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 314 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 00:40:56,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9376 states. [2022-07-22 00:40:56,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9376 to 8659. [2022-07-22 00:40:56,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8659 states, 6117 states have (on average 1.1057708026810529) internal successors, (6764), 6272 states have internal predecessors, (6764), 1498 states have call successors, (1498), 347 states have call predecessors, (1498), 1040 states have return successors, (8216), 2039 states have call predecessors, (8216), 1330 states have call successors, (8216) [2022-07-22 00:40:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8659 states to 8659 states and 16478 transitions. [2022-07-22 00:40:56,874 INFO L78 Accepts]: Start accepts. Automaton has 8659 states and 16478 transitions. Word has length 58 [2022-07-22 00:40:56,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:40:56,874 INFO L495 AbstractCegarLoop]: Abstraction has 8659 states and 16478 transitions. [2022-07-22 00:40:56,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:40:56,875 INFO L276 IsEmpty]: Start isEmpty. Operand 8659 states and 16478 transitions. [2022-07-22 00:40:56,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-22 00:40:56,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:40:56,877 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:40:56,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 00:40:57,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:57,093 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:40:57,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:40:57,094 INFO L85 PathProgramCache]: Analyzing trace with hash 526800899, now seen corresponding path program 1 times [2022-07-22 00:40:57,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:40:57,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672969563] [2022-07-22 00:40:57,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:57,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:40:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:57,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:40:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:57,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:40:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:57,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:40:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:57,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 00:40:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 00:40:57,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:40:57,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672969563] [2022-07-22 00:40:57,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672969563] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:40:57,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026987213] [2022-07-22 00:40:57,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:40:57,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:40:57,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:40:57,217 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:40:57,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 00:40:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:40:57,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 00:40:57,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:40:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-22 00:40:57,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:40:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 00:40:57,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026987213] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:40:57,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:40:57,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-07-22 00:40:57,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675139321] [2022-07-22 00:40:57,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:40:57,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 00:40:57,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:40:57,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 00:40:57,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-07-22 00:40:57,703 INFO L87 Difference]: Start difference. First operand 8659 states and 16478 transitions. Second operand has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-22 00:41:00,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:41:00,026 INFO L93 Difference]: Finished difference Result 30203 states and 100302 transitions. [2022-07-22 00:41:00,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-22 00:41:00,027 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-07-22 00:41:00,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:41:00,316 INFO L225 Difference]: With dead ends: 30203 [2022-07-22 00:41:00,316 INFO L226 Difference]: Without dead ends: 22210 [2022-07-22 00:41:00,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=906, Invalid=3516, Unknown=0, NotChecked=0, Total=4422 [2022-07-22 00:41:00,422 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 129 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 00:41:00,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 354 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 00:41:00,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22210 states. [2022-07-22 00:41:02,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22210 to 17565. [2022-07-22 00:41:02,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17565 states, 11675 states have (on average 1.0707494646680942) internal successors, (12501), 11802 states have internal predecessors, (12501), 3307 states have call successors, (3307), 438 states have call predecessors, (3307), 2579 states have return successors, (43949), 5324 states have call predecessors, (43949), 3113 states have call successors, (43949) [2022-07-22 00:41:02,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17565 states to 17565 states and 59757 transitions. [2022-07-22 00:41:02,792 INFO L78 Accepts]: Start accepts. Automaton has 17565 states and 59757 transitions. Word has length 56 [2022-07-22 00:41:02,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:41:02,792 INFO L495 AbstractCegarLoop]: Abstraction has 17565 states and 59757 transitions. [2022-07-22 00:41:02,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-22 00:41:02,793 INFO L276 IsEmpty]: Start isEmpty. Operand 17565 states and 59757 transitions. [2022-07-22 00:41:02,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-22 00:41:02,795 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:41:02,795 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:41:02,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 00:41:03,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-22 00:41:03,012 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:41:03,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:41:03,012 INFO L85 PathProgramCache]: Analyzing trace with hash -2027008992, now seen corresponding path program 2 times [2022-07-22 00:41:03,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:41:03,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431236917] [2022-07-22 00:41:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:41:03,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:41:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:03,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 00:41:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:03,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:41:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:03,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:03,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:41:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:03,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 00:41:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 89 proven. 17 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-22 00:41:03,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:41:03,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431236917] [2022-07-22 00:41:03,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431236917] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:41:03,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107724350] [2022-07-22 00:41:03,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 00:41:03,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:41:03,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:41:03,163 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:41:03,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 00:41:03,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 00:41:03,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:41:03,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 00:41:03,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:41:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 78 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-22 00:41:03,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:41:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 97 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-22 00:41:03,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107724350] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:41:03,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:41:03,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2022-07-22 00:41:03,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347453846] [2022-07-22 00:41:03,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:41:03,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 00:41:03,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:41:03,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 00:41:03,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 00:41:03,926 INFO L87 Difference]: Start difference. First operand 17565 states and 59757 transitions. Second operand has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-22 00:41:05,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:41:05,775 INFO L93 Difference]: Finished difference Result 29426 states and 97217 transitions. [2022-07-22 00:41:05,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 00:41:05,776 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 81 [2022-07-22 00:41:05,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:41:05,849 INFO L225 Difference]: With dead ends: 29426 [2022-07-22 00:41:05,850 INFO L226 Difference]: Without dead ends: 12522 [2022-07-22 00:41:06,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2022-07-22 00:41:06,179 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 166 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:41:06,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 394 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:41:06,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12522 states. [2022-07-22 00:41:07,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12522 to 11029. [2022-07-22 00:41:07,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11029 states, 7807 states have (on average 1.1115665428461636) internal successors, (8678), 8110 states have internal predecessors, (8678), 1942 states have call successors, (1942), 487 states have call predecessors, (1942), 1276 states have return successors, (5975), 2431 states have call predecessors, (5975), 1723 states have call successors, (5975) [2022-07-22 00:41:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11029 states to 11029 states and 16595 transitions. [2022-07-22 00:41:07,131 INFO L78 Accepts]: Start accepts. Automaton has 11029 states and 16595 transitions. Word has length 81 [2022-07-22 00:41:07,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:41:07,131 INFO L495 AbstractCegarLoop]: Abstraction has 11029 states and 16595 transitions. [2022-07-22 00:41:07,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-22 00:41:07,132 INFO L276 IsEmpty]: Start isEmpty. Operand 11029 states and 16595 transitions. [2022-07-22 00:41:07,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-22 00:41:07,135 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:41:07,135 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:41:07,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 00:41:07,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:41:07,351 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:41:07,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:41:07,352 INFO L85 PathProgramCache]: Analyzing trace with hash 821485916, now seen corresponding path program 4 times [2022-07-22 00:41:07,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:41:07,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315246851] [2022-07-22 00:41:07,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:41:07,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:41:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:07,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 00:41:07,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 00:41:07,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:41:07,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315246851] [2022-07-22 00:41:07,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315246851] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:41:07,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710544176] [2022-07-22 00:41:07,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 00:41:07,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:41:07,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:41:07,500 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:41:07,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 00:41:07,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 00:41:07,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:41:07,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 00:41:07,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:41:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 106 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-22 00:41:07,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:41:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 106 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-22 00:41:07,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710544176] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:41:07,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:41:07,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 23 [2022-07-22 00:41:07,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655183832] [2022-07-22 00:41:07,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:41:07,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 00:41:07,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:41:07,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 00:41:07,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-07-22 00:41:07,701 INFO L87 Difference]: Start difference. First operand 11029 states and 16595 transitions. Second operand has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 16 states have internal predecessors, (78), 10 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 00:41:08,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:41:08,532 INFO L93 Difference]: Finished difference Result 11563 states and 17375 transitions. [2022-07-22 00:41:08,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 00:41:08,533 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 16 states have internal predecessors, (78), 10 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-07-22 00:41:08,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:41:08,563 INFO L225 Difference]: With dead ends: 11563 [2022-07-22 00:41:08,563 INFO L226 Difference]: Without dead ends: 9324 [2022-07-22 00:41:08,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=374, Invalid=1348, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 00:41:08,573 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 352 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:41:08,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 85 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:41:08,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9324 states. [2022-07-22 00:41:09,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9324 to 8758. [2022-07-22 00:41:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8758 states, 5964 states have (on average 1.0675720992622402) internal successors, (6367), 6090 states have internal predecessors, (6367), 1731 states have call successors, (1731), 316 states have call predecessors, (1731), 1059 states have return successors, (5687), 2351 states have call predecessors, (5687), 1723 states have call successors, (5687) [2022-07-22 00:41:09,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8758 states to 8758 states and 13785 transitions. [2022-07-22 00:41:09,252 INFO L78 Accepts]: Start accepts. Automaton has 8758 states and 13785 transitions. Word has length 68 [2022-07-22 00:41:09,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:41:09,252 INFO L495 AbstractCegarLoop]: Abstraction has 8758 states and 13785 transitions. [2022-07-22 00:41:09,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 16 states have internal predecessors, (78), 10 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 00:41:09,252 INFO L276 IsEmpty]: Start isEmpty. Operand 8758 states and 13785 transitions. [2022-07-22 00:41:09,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 00:41:09,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:41:09,254 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:41:09,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-22 00:41:09,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:41:09,460 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:41:09,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:41:09,460 INFO L85 PathProgramCache]: Analyzing trace with hash -131434271, now seen corresponding path program 3 times [2022-07-22 00:41:09,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:41:09,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336079584] [2022-07-22 00:41:09,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:41:09,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:41:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:09,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:41:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:09,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:41:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:41:09,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:41:09,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336079584] [2022-07-22 00:41:09,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336079584] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:41:09,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69838019] [2022-07-22 00:41:09,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 00:41:09,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:41:09,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:41:09,583 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:41:09,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 00:41:09,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-22 00:41:09,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:41:09,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 00:41:09,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:41:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:41:09,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:41:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 65 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 00:41:09,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69838019] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:41:09,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:41:09,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-07-22 00:41:09,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953743360] [2022-07-22 00:41:09,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:41:09,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 00:41:09,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:41:09,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 00:41:09,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 00:41:09,978 INFO L87 Difference]: Start difference. First operand 8758 states and 13785 transitions. Second operand has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 00:41:10,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:41:10,959 INFO L93 Difference]: Finished difference Result 9409 states and 14783 transitions. [2022-07-22 00:41:10,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 00:41:10,960 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2022-07-22 00:41:10,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:41:10,991 INFO L225 Difference]: With dead ends: 9409 [2022-07-22 00:41:10,992 INFO L226 Difference]: Without dead ends: 9408 [2022-07-22 00:41:10,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 00:41:10,995 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 289 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:41:10,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 226 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:41:11,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9408 states. [2022-07-22 00:41:11,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9408 to 8866. [2022-07-22 00:41:11,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8866 states, 6036 states have (on average 1.0637839628893306) internal successors, (6421), 6162 states have internal predecessors, (6421), 1731 states have call successors, (1731), 316 states have call predecessors, (1731), 1095 states have return successors, (5781), 2387 states have call predecessors, (5781), 1723 states have call successors, (5781) [2022-07-22 00:41:11,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8866 states to 8866 states and 13933 transitions. [2022-07-22 00:41:11,699 INFO L78 Accepts]: Start accepts. Automaton has 8866 states and 13933 transitions. Word has length 69 [2022-07-22 00:41:11,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:41:11,699 INFO L495 AbstractCegarLoop]: Abstraction has 8866 states and 13933 transitions. [2022-07-22 00:41:11,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 00:41:11,700 INFO L276 IsEmpty]: Start isEmpty. Operand 8866 states and 13933 transitions. [2022-07-22 00:41:11,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-22 00:41:11,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:41:11,703 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 00:41:11,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-22 00:41:11,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:41:11,919 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:41:11,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:41:11,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1597804450, now seen corresponding path program 2 times [2022-07-22 00:41:11,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:41:11,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609877938] [2022-07-22 00:41:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:41:11,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:41:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:11,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 00:41:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:11,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:41:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:11,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:11,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:11,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:41:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:11,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 00:41:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:11,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 00:41:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-22 00:41:11,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:41:11,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609877938] [2022-07-22 00:41:11,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609877938] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:41:11,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909644634] [2022-07-22 00:41:11,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 00:41:11,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:41:11,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:41:11,999 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:41:12,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 00:41:12,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 00:41:12,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:41:12,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 00:41:12,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:41:12,104 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 100 proven. 15 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 00:41:12,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:41:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 100 proven. 26 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-22 00:41:12,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909644634] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:41:12,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:41:12,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2022-07-22 00:41:12,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895545686] [2022-07-22 00:41:12,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:41:12,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 00:41:12,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:41:12,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 00:41:12,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-07-22 00:41:12,347 INFO L87 Difference]: Start difference. First operand 8866 states and 13933 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-22 00:41:12,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:41:12,962 INFO L93 Difference]: Finished difference Result 17989 states and 31874 transitions. [2022-07-22 00:41:12,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 00:41:12,962 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 88 [2022-07-22 00:41:12,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:41:12,997 INFO L225 Difference]: With dead ends: 17989 [2022-07-22 00:41:12,997 INFO L226 Difference]: Without dead ends: 9810 [2022-07-22 00:41:13,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2022-07-22 00:41:13,031 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 80 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:41:13,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 88 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:41:13,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2022-07-22 00:41:13,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 8860. [2022-07-22 00:41:13,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8860 states, 6033 states have (on average 1.0638156804243328) internal successors, (6418), 6159 states have internal predecessors, (6418), 1728 states have call successors, (1728), 316 states have call predecessors, (1728), 1095 states have return successors, (5701), 2384 states have call predecessors, (5701), 1693 states have call successors, (5701) [2022-07-22 00:41:13,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8860 states to 8860 states and 13847 transitions. [2022-07-22 00:41:13,649 INFO L78 Accepts]: Start accepts. Automaton has 8860 states and 13847 transitions. Word has length 88 [2022-07-22 00:41:13,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:41:13,650 INFO L495 AbstractCegarLoop]: Abstraction has 8860 states and 13847 transitions. [2022-07-22 00:41:13,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-22 00:41:13,650 INFO L276 IsEmpty]: Start isEmpty. Operand 8860 states and 13847 transitions. [2022-07-22 00:41:13,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-22 00:41:13,654 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:41:13,654 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 00:41:13,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-22 00:41:13,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-22 00:41:13,862 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:41:13,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:41:13,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1897499616, now seen corresponding path program 3 times [2022-07-22 00:41:13,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:41:13,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181045314] [2022-07-22 00:41:13,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:41:13,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:41:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:13,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:41:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:13,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:13,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:13,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:41:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:14,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:14,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:41:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:14,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 00:41:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:14,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-22 00:41:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:14,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 00:41:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:14,050 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 113 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-22 00:41:14,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:41:14,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181045314] [2022-07-22 00:41:14,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181045314] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:41:14,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077486041] [2022-07-22 00:41:14,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 00:41:14,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:41:14,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:41:14,052 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:41:14,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 00:41:14,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-22 00:41:14,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:41:14,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 00:41:14,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:41:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 150 proven. 26 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-22 00:41:14,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:41:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 119 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-22 00:41:14,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077486041] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:41:14,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:41:14,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2022-07-22 00:41:14,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613820261] [2022-07-22 00:41:14,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:41:14,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 00:41:14,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:41:14,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 00:41:14,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-07-22 00:41:14,741 INFO L87 Difference]: Start difference. First operand 8860 states and 13847 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2022-07-22 00:41:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:41:15,759 INFO L93 Difference]: Finished difference Result 20507 states and 41561 transitions. [2022-07-22 00:41:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 00:41:15,759 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) Word has length 99 [2022-07-22 00:41:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:41:15,824 INFO L225 Difference]: With dead ends: 20507 [2022-07-22 00:41:15,825 INFO L226 Difference]: Without dead ends: 12363 [2022-07-22 00:41:15,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-07-22 00:41:15,881 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 122 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:41:15,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 130 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:41:15,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12363 states. [2022-07-22 00:41:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12363 to 11997. [2022-07-22 00:41:16,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11997 states, 8101 states have (on average 1.054684606838662) internal successors, (8544), 8288 states have internal predecessors, (8544), 2417 states have call successors, (2417), 424 states have call predecessors, (2417), 1475 states have return successors, (8115), 3284 states have call predecessors, (8115), 2362 states have call successors, (8115) [2022-07-22 00:41:16,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11997 states to 11997 states and 19076 transitions. [2022-07-22 00:41:16,988 INFO L78 Accepts]: Start accepts. Automaton has 11997 states and 19076 transitions. Word has length 99 [2022-07-22 00:41:16,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:41:16,989 INFO L495 AbstractCegarLoop]: Abstraction has 11997 states and 19076 transitions. [2022-07-22 00:41:16,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2022-07-22 00:41:16,989 INFO L276 IsEmpty]: Start isEmpty. Operand 11997 states and 19076 transitions. [2022-07-22 00:41:16,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-22 00:41:16,994 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:41:16,994 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 7, 7, 7, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:41:17,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-22 00:41:17,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-22 00:41:17,210 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:41:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:41:17,211 INFO L85 PathProgramCache]: Analyzing trace with hash -127918165, now seen corresponding path program 3 times [2022-07-22 00:41:17,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:41:17,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450362183] [2022-07-22 00:41:17,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:41:17,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:41:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:17,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:41:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:17,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:17,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:41:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:17,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 00:41:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 122 proven. 90 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 00:41:17,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:41:17,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450362183] [2022-07-22 00:41:17,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450362183] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:41:17,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628687360] [2022-07-22 00:41:17,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 00:41:17,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:41:17,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:41:17,400 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:41:17,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-22 00:41:17,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-22 00:41:17,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:41:17,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-22 00:41:17,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:41:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 119 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-22 00:41:17,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:41:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-22 00:41:17,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628687360] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:41:17,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:41:17,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2022-07-22 00:41:17,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266389088] [2022-07-22 00:41:17,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:41:17,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 00:41:17,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:41:17,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 00:41:17,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-07-22 00:41:17,715 INFO L87 Difference]: Start difference. First operand 11997 states and 19076 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-22 00:41:19,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:41:19,403 INFO L93 Difference]: Finished difference Result 20852 states and 35642 transitions. [2022-07-22 00:41:19,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-22 00:41:19,403 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 88 [2022-07-22 00:41:19,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:41:19,441 INFO L225 Difference]: With dead ends: 20852 [2022-07-22 00:41:19,442 INFO L226 Difference]: Without dead ends: 10359 [2022-07-22 00:41:19,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2022-07-22 00:41:19,478 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 209 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 00:41:19,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 154 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 00:41:19,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2022-07-22 00:41:20,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 8741. [2022-07-22 00:41:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8741 states, 5968 states have (on average 1.0464142091152815) internal successors, (6245), 6144 states have internal predecessors, (6245), 1711 states have call successors, (1711), 352 states have call predecessors, (1711), 1058 states have return successors, (4097), 2244 states have call predecessors, (4097), 1677 states have call successors, (4097) [2022-07-22 00:41:20,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 12053 transitions. [2022-07-22 00:41:20,063 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 12053 transitions. Word has length 88 [2022-07-22 00:41:20,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:41:20,064 INFO L495 AbstractCegarLoop]: Abstraction has 8741 states and 12053 transitions. [2022-07-22 00:41:20,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-22 00:41:20,064 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 12053 transitions. [2022-07-22 00:41:20,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-22 00:41:20,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:41:20,067 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:41:20,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-22 00:41:20,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-22 00:41:20,283 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:41:20,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:41:20,283 INFO L85 PathProgramCache]: Analyzing trace with hash -635779733, now seen corresponding path program 4 times [2022-07-22 00:41:20,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:41:20,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786865740] [2022-07-22 00:41:20,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:41:20,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:41:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:20,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:41:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:20,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:20,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:20,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:20,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:20,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:20,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:41:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:20,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 00:41:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:20,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 00:41:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:20,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-22 00:41:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-22 00:41:20,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:41:20,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786865740] [2022-07-22 00:41:20,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786865740] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:41:20,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252396926] [2022-07-22 00:41:20,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 00:41:20,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:41:20,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:41:20,483 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:41:20,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-22 00:41:20,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 00:41:20,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:41:20,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 00:41:20,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:41:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-22 00:41:20,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:41:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 42 proven. 89 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-22 00:41:21,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252396926] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:41:21,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:41:21,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2022-07-22 00:41:21,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697051763] [2022-07-22 00:41:21,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:41:21,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-22 00:41:21,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:41:21,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-22 00:41:21,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 00:41:21,798 INFO L87 Difference]: Start difference. First operand 8741 states and 12053 transitions. Second operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2022-07-22 00:41:25,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:41:25,781 INFO L93 Difference]: Finished difference Result 29169 states and 46148 transitions. [2022-07-22 00:41:25,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-07-22 00:41:25,781 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) Word has length 90 [2022-07-22 00:41:25,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:41:25,912 INFO L225 Difference]: With dead ends: 29169 [2022-07-22 00:41:25,913 INFO L226 Difference]: Without dead ends: 28067 [2022-07-22 00:41:25,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12152 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2022-07-22 00:41:25,945 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 149 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 1618 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 2301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 1618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 00:41:25,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 362 Invalid, 2301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 1618 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 00:41:25,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28067 states. [2022-07-22 00:41:27,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28067 to 17311. [2022-07-22 00:41:27,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17311 states, 11232 states have (on average 1.0269764957264957) internal successors, (11535), 11391 states have internal predecessors, (11535), 3626 states have call successors, (3626), 460 states have call predecessors, (3626), 2449 states have return successors, (11770), 5459 states have call predecessors, (11770), 3572 states have call successors, (11770) [2022-07-22 00:41:27,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17311 states to 17311 states and 26931 transitions. [2022-07-22 00:41:27,397 INFO L78 Accepts]: Start accepts. Automaton has 17311 states and 26931 transitions. Word has length 90 [2022-07-22 00:41:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:41:27,398 INFO L495 AbstractCegarLoop]: Abstraction has 17311 states and 26931 transitions. [2022-07-22 00:41:27,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2022-07-22 00:41:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 17311 states and 26931 transitions. [2022-07-22 00:41:27,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-22 00:41:27,401 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:41:27,401 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2022-07-22 00:41:27,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-22 00:41:27,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:41:27,618 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:41:27,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:41:27,619 INFO L85 PathProgramCache]: Analyzing trace with hash 147414137, now seen corresponding path program 3 times [2022-07-22 00:41:27,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:41:27,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031976662] [2022-07-22 00:41:27,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:41:27,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:41:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:41:27,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:41:27,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031976662] [2022-07-22 00:41:27,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031976662] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:41:27,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006900171] [2022-07-22 00:41:27,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 00:41:27,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:41:27,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:41:27,868 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:41:27,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-22 00:41:27,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-22 00:41:27,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:41:27,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 00:41:27,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:41:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:41:28,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:41:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:41:28,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006900171] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:41:28,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:41:28,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-07-22 00:41:28,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420506617] [2022-07-22 00:41:28,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:41:28,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-22 00:41:28,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:41:28,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-22 00:41:28,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-07-22 00:41:28,486 INFO L87 Difference]: Start difference. First operand 17311 states and 26931 transitions. Second operand has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:41:31,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:41:31,231 INFO L93 Difference]: Finished difference Result 28628 states and 44547 transitions. [2022-07-22 00:41:31,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-22 00:41:31,232 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-07-22 00:41:31,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:41:31,332 INFO L225 Difference]: With dead ends: 28628 [2022-07-22 00:41:31,333 INFO L226 Difference]: Without dead ends: 28627 [2022-07-22 00:41:31,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2022-07-22 00:41:31,348 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1001 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 00:41:31,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1005 Valid, 742 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 00:41:31,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28627 states. [2022-07-22 00:41:33,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28627 to 28627. [2022-07-22 00:41:33,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28627 states, 18540 states have (on average 1.0279935275080907) internal successors, (19059), 18915 states have internal predecessors, (19059), 5846 states have call successors, (5846), 676 states have call predecessors, (5846), 4237 states have return successors, (19630), 9035 states have call predecessors, (19630), 5792 states have call successors, (19630) [2022-07-22 00:41:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28627 states to 28627 states and 44535 transitions. [2022-07-22 00:41:33,442 INFO L78 Accepts]: Start accepts. Automaton has 28627 states and 44535 transitions. Word has length 92 [2022-07-22 00:41:33,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:41:33,443 INFO L495 AbstractCegarLoop]: Abstraction has 28627 states and 44535 transitions. [2022-07-22 00:41:33,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:41:33,443 INFO L276 IsEmpty]: Start isEmpty. Operand 28627 states and 44535 transitions. [2022-07-22 00:41:33,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-22 00:41:33,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:41:33,452 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2022-07-22 00:41:33,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-22 00:41:33,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:41:33,668 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:41:33,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:41:33,668 INFO L85 PathProgramCache]: Analyzing trace with hash -570444405, now seen corresponding path program 2 times [2022-07-22 00:41:33,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:41:33,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735928756] [2022-07-22 00:41:33,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:41:33,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:41:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 00:41:33,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:41:33,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735928756] [2022-07-22 00:41:33,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735928756] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:41:33,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215839232] [2022-07-22 00:41:33,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 00:41:33,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:41:33,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:41:33,890 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:41:33,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-22 00:41:33,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 00:41:33,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:41:33,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-22 00:41:33,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:41:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 00:41:34,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:41:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 00:41:34,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215839232] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:41:34,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:41:34,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-07-22 00:41:34,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970307186] [2022-07-22 00:41:34,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:41:34,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-22 00:41:34,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:41:34,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-22 00:41:34,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-07-22 00:41:34,624 INFO L87 Difference]: Start difference. First operand 28627 states and 44535 transitions. Second operand has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:41:39,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:41:39,699 INFO L93 Difference]: Finished difference Result 64728 states and 101341 transitions. [2022-07-22 00:41:39,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-22 00:41:39,700 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2022-07-22 00:41:39,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:41:39,942 INFO L225 Difference]: With dead ends: 64728 [2022-07-22 00:41:39,942 INFO L226 Difference]: Without dead ends: 64727 [2022-07-22 00:41:39,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2022-07-22 00:41:39,970 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2522 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 937 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2525 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 937 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 00:41:39,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2525 Valid, 541 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [937 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 00:41:40,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64727 states. [2022-07-22 00:41:44,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64727 to 64675. [2022-07-22 00:41:44,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64675 states, 41976 states have (on average 1.028659233847913) internal successors, (43179), 42843 states have internal predecessors, (43179), 13190 states have call successors, (13190), 1564 states have call predecessors, (13190), 9505 states have return successors, (44950), 20267 states have call predecessors, (44950), 13076 states have call successors, (44950) [2022-07-22 00:41:45,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64675 states to 64675 states and 101319 transitions. [2022-07-22 00:41:45,079 INFO L78 Accepts]: Start accepts. Automaton has 64675 states and 101319 transitions. Word has length 142 [2022-07-22 00:41:45,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:41:45,080 INFO L495 AbstractCegarLoop]: Abstraction has 64675 states and 101319 transitions. [2022-07-22 00:41:45,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:41:45,081 INFO L276 IsEmpty]: Start isEmpty. Operand 64675 states and 101319 transitions. [2022-07-22 00:41:45,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-07-22 00:41:45,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:41:45,097 INFO L195 NwaCegarLoop]: trace histogram [19, 17, 12, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-22 00:41:45,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-22 00:41:45,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-22 00:41:45,312 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:41:45,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:41:45,312 INFO L85 PathProgramCache]: Analyzing trace with hash 109385931, now seen corresponding path program 1 times [2022-07-22 00:41:45,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:41:45,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208994084] [2022-07-22 00:41:45,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:41:45,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:41:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:45,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 00:41:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:45,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:41:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:45,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:45,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:41:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:45,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:45,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:41:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:45,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 00:41:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:45,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-22 00:41:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:45,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:45,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:45,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:45,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:41:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:45,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:41:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:45,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 00:41:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:45,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 00:41:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:45,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-22 00:41:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:45,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-22 00:41:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:45,592 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 369 proven. 214 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-07-22 00:41:45,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:41:45,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208994084] [2022-07-22 00:41:45,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208994084] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:41:45,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310310347] [2022-07-22 00:41:45,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:41:45,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:41:45,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:41:45,612 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:41:45,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-22 00:41:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:41:45,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 00:41:45,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:41:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 357 proven. 216 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2022-07-22 00:41:45,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:41:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 373 proven. 263 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2022-07-22 00:41:47,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310310347] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:41:47,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:41:47,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 21] total 27 [2022-07-22 00:41:47,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102654315] [2022-07-22 00:41:47,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:41:47,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 00:41:47,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:41:47,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 00:41:47,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-07-22 00:41:47,440 INFO L87 Difference]: Start difference. First operand 64675 states and 101319 transitions. Second operand has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 24 states have internal predecessors, (122), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) [2022-07-22 00:41:54,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:41:54,603 INFO L93 Difference]: Finished difference Result 152847 states and 310280 transitions. [2022-07-22 00:41:54,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 00:41:54,604 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 24 states have internal predecessors, (122), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) Word has length 177 [2022-07-22 00:41:54,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:41:55,430 INFO L225 Difference]: With dead ends: 152847 [2022-07-22 00:41:55,431 INFO L226 Difference]: Without dead ends: 94875 [2022-07-22 00:41:55,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 384 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1557, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 00:41:55,719 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 145 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:41:55,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 257 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:41:55,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94875 states. [2022-07-22 00:42:02,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94875 to 64457. [2022-07-22 00:42:02,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64457 states, 41867 states have (on average 1.0287338476604486) internal successors, (43070), 42734 states have internal predecessors, (43070), 13081 states have call successors, (13081), 1564 states have call predecessors, (13081), 9505 states have return successors, (44883), 20158 states have call predecessors, (44883), 12967 states have call successors, (44883) [2022-07-22 00:42:02,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64457 states to 64457 states and 101034 transitions. [2022-07-22 00:42:02,363 INFO L78 Accepts]: Start accepts. Automaton has 64457 states and 101034 transitions. Word has length 177 [2022-07-22 00:42:02,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:42:02,364 INFO L495 AbstractCegarLoop]: Abstraction has 64457 states and 101034 transitions. [2022-07-22 00:42:02,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 24 states have internal predecessors, (122), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) [2022-07-22 00:42:02,364 INFO L276 IsEmpty]: Start isEmpty. Operand 64457 states and 101034 transitions. [2022-07-22 00:42:02,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-07-22 00:42:02,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:42:02,382 INFO L195 NwaCegarLoop]: trace histogram [29, 21, 18, 15, 15, 15, 15, 15, 15, 11, 10, 10, 10, 10, 10, 8, 8, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-22 00:42:02,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-22 00:42:02,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-22 00:42:02,595 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-22 00:42:02,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:42:02,596 INFO L85 PathProgramCache]: Analyzing trace with hash -538409204, now seen corresponding path program 5 times [2022-07-22 00:42:02,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:42:02,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542485294] [2022-07-22 00:42:02,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:42:02,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:42:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:02,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-22 00:42:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:02,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:42:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:02,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:42:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:02,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:42:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:02,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 00:42:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:02,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-22 00:42:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:02,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:42:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:02,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:42:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:02,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:42:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:02,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:42:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:02,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:42:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:02,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:42:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:02,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 00:42:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:02,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 00:42:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:03,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 00:42:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:03,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 00:42:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:03,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-22 00:42:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:03,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-22 00:42:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:03,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-22 00:42:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:03,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-22 00:42:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:03,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-07-22 00:42:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:42:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2140 backedges. 480 proven. 275 refuted. 0 times theorem prover too weak. 1385 trivial. 0 not checked. [2022-07-22 00:42:03,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:42:03,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542485294] [2022-07-22 00:42:03,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542485294] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:42:03,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384619715] [2022-07-22 00:42:03,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 00:42:03,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:42:03,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:42:03,064 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:42:03,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-22 00:42:03,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-22 00:42:03,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:42:03,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-22 00:42:03,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:42:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2140 backedges. 433 proven. 496 refuted. 0 times theorem prover too weak. 1211 trivial. 0 not checked. [2022-07-22 00:42:03,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:42:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2140 backedges. 443 proven. 506 refuted. 0 times theorem prover too weak. 1191 trivial. 0 not checked. [2022-07-22 00:42:04,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384619715] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:42:04,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:42:04,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 16, 19] total 50 [2022-07-22 00:42:04,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518054936] [2022-07-22 00:42:04,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:42:04,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-22 00:42:04,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:42:04,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-22 00:42:04,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2206, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 00:42:04,079 INFO L87 Difference]: Start difference. First operand 64457 states and 101034 transitions. Second operand has 50 states, 50 states have (on average 2.46) internal successors, (123), 37 states have internal predecessors, (123), 19 states have call successors, (23), 4 states have call predecessors, (23), 19 states have return successors, (35), 26 states have call predecessors, (35), 16 states have call successors, (35)