./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-numeric/Ackermann01-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-numeric/Ackermann01-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-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 64bit --witnessprinter.graph.data.programhash 380ed529f726f53285b49ce40e57404dbe066b029b8c3af7ce337366515780a5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 13:24:21,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 13:24:21,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 13:24:21,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 13:24:21,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 13:24:21,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 13:24:21,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 13:24:21,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 13:24:21,196 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 13:24:21,200 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 13:24:21,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 13:24:21,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 13:24:21,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 13:24:21,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 13:24:21,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 13:24:21,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 13:24:21,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 13:24:21,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 13:24:21,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 13:24:21,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 13:24:21,220 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 13:24:21,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 13:24:21,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 13:24:21,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 13:24:21,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 13:24:21,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 13:24:21,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 13:24:21,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 13:24:21,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 13:24:21,234 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 13:24:21,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 13:24:21,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 13:24:21,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 13:24:21,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 13:24:21,238 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 13:24:21,239 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 13:24:21,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 13:24:21,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 13:24:21,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 13:24:21,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 13:24:21,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 13:24:21,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 13:24:21,244 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2022-07-23 13:24:21,275 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 13:24:21,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 13:24:21,276 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 13:24:21,276 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 13:24:21,277 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 13:24:21,277 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 13:24:21,278 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 13:24:21,278 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 13:24:21,278 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 13:24:21,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 13:24:21,279 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 13:24:21,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 13:24:21,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 13:24:21,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-23 13:24:21,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 13:24:21,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-23 13:24:21,280 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-07-23 13:24:21,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-23 13:24:21,281 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 13:24:21,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-23 13:24:21,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 13:24:21,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 13:24:21,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 13:24:21,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 13:24:21,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 13:24:21,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 13:24:21,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-23 13:24:21,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 13:24:21,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 13:24:21,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-23 13:24:21,283 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 380ed529f726f53285b49ce40e57404dbe066b029b8c3af7ce337366515780a5 [2022-07-23 13:24:21,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 13:24:21,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 13:24:21,558 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 13:24:21,559 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 13:24:21,559 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 13:24:21,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2022-07-23 13:24:21,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2e02c728/edc54bb5c7194b2ca66fabf52d81458a/FLAG0311e15ea [2022-07-23 13:24:22,065 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 13:24:22,065 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2022-07-23 13:24:22,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2e02c728/edc54bb5c7194b2ca66fabf52d81458a/FLAG0311e15ea [2022-07-23 13:24:22,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2e02c728/edc54bb5c7194b2ca66fabf52d81458a [2022-07-23 13:24:22,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 13:24:22,089 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 13:24:22,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 13:24:22,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 13:24:22,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 13:24:22,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 01:24:22" (1/1) ... [2022-07-23 13:24:22,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a135413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:24:22, skipping insertion in model container [2022-07-23 13:24:22,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 01:24:22" (1/1) ... [2022-07-23 13:24:22,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 13:24:22,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 13:24:22,283 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/termination-numeric/Ackermann01-1.c[944,957] [2022-07-23 13:24:22,284 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 13:24:22,296 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 13:24:22,318 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/termination-numeric/Ackermann01-1.c[944,957] [2022-07-23 13:24:22,319 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 13:24:22,331 INFO L208 MainTranslator]: Completed translation [2022-07-23 13:24:22,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:24:22 WrapperNode [2022-07-23 13:24:22,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 13:24:22,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 13:24:22,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 13:24:22,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 13:24:22,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:24:22" (1/1) ... [2022-07-23 13:24:22,349 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:24:22" (1/1) ... [2022-07-23 13:24:22,365 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-07-23 13:24:22,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 13:24:22,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 13:24:22,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 13:24:22,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 13:24:22,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:24:22" (1/1) ... [2022-07-23 13:24:22,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:24:22" (1/1) ... [2022-07-23 13:24:22,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:24:22" (1/1) ... [2022-07-23 13:24:22,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:24:22" (1/1) ... [2022-07-23 13:24:22,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:24:22" (1/1) ... [2022-07-23 13:24:22,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:24:22" (1/1) ... [2022-07-23 13:24:22,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:24:22" (1/1) ... [2022-07-23 13:24:22,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 13:24:22,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 13:24:22,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 13:24:22,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 13:24:22,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:24:22" (1/1) ... [2022-07-23 13:24:22,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 13:24:22,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:22,432 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) [2022-07-23 13:24:22,445 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 [2022-07-23 13:24:22,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 13:24:22,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 13:24:22,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 13:24:22,476 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-07-23 13:24:22,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-07-23 13:24:22,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-23 13:24:22,522 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 13:24:22,524 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 13:24:22,705 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 13:24:22,710 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 13:24:22,710 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-23 13:24:22,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 01:24:22 BoogieIcfgContainer [2022-07-23 13:24:22,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 13:24:22,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 13:24:22,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 13:24:22,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 13:24:22,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 01:24:22" (1/3) ... [2022-07-23 13:24:22,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e602014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 01:24:22, skipping insertion in model container [2022-07-23 13:24:22,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:24:22" (2/3) ... [2022-07-23 13:24:22,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e602014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 01:24:22, skipping insertion in model container [2022-07-23 13:24:22,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 01:24:22" (3/3) ... [2022-07-23 13:24:22,720 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann01-1.c [2022-07-23 13:24:22,746 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 13:24:22,759 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-07-23 13:24:22,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 13:24:22,822 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@5184ece4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@78f69c49 [2022-07-23 13:24:22,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-23 13:24:22,826 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) [2022-07-23 13:24:22,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 13:24:22,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:22,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:24:22,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:22,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:22,839 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2022-07-23 13:24:22,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:22,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653163422] [2022-07-23 13:24:22,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:22,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:23,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:23,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653163422] [2022-07-23 13:24:23,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653163422] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:24:23,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:24:23,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:24:23,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195897186] [2022-07-23 13:24:23,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:24:23,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 13:24:23,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:23,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 13:24:23,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:24:23,096 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) [2022-07-23 13:24:23,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:23,253 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2022-07-23 13:24:23,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 13:24:23,256 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 [2022-07-23 13:24:23,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:23,267 INFO L225 Difference]: With dead ends: 73 [2022-07-23 13:24:23,268 INFO L226 Difference]: Without dead ends: 59 [2022-07-23 13:24:23,271 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 [2022-07-23 13:24:23,275 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 55 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-07-23 13:24:23,276 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] [2022-07-23 13:24:23,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-23 13:24:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2022-07-23 13:24:23,331 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) [2022-07-23 13:24:23,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-07-23 13:24:23,340 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2022-07-23 13:24:23,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:23,341 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-07-23 13:24:23,341 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) [2022-07-23 13:24:23,342 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-07-23 13:24:23,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 13:24:23,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:23,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:24:23,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-23 13:24:23,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:23,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:23,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2022-07-23 13:24:23,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:23,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153057783] [2022-07-23 13:24:23,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:23,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:23,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:23,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153057783] [2022-07-23 13:24:23,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153057783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:24:23,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:24:23,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:24:23,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687426555] [2022-07-23 13:24:23,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:24:23,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 13:24:23,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:23,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 13:24:23,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:24:23,416 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) [2022-07-23 13:24:23,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:23,475 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-07-23 13:24:23,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 13:24:23,476 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 [2022-07-23 13:24:23,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:23,477 INFO L225 Difference]: With dead ends: 51 [2022-07-23 13:24:23,477 INFO L226 Difference]: Without dead ends: 49 [2022-07-23 13:24:23,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 13:24:23,481 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 [2022-07-23 13:24:23,482 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] [2022-07-23 13:24:23,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-23 13:24:23,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-23 13:24:23,501 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) [2022-07-23 13:24:23,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-07-23 13:24:23,502 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2022-07-23 13:24:23,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:23,503 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-07-23 13:24:23,503 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) [2022-07-23 13:24:23,503 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-07-23 13:24:23,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 13:24:23,504 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:23,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:24:23,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-23 13:24:23,504 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:23,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:23,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2022-07-23 13:24:23,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:23,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496009943] [2022-07-23 13:24:23,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:23,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:23,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:23,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496009943] [2022-07-23 13:24:23,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496009943] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:24:23,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:24:23,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:24:23,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589021616] [2022-07-23 13:24:23,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:24:23,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 13:24:23,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:23,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 13:24:23,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:24:23,584 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) [2022-07-23 13:24:23,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:23,650 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2022-07-23 13:24:23,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 13:24:23,651 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 [2022-07-23 13:24:23,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:23,653 INFO L225 Difference]: With dead ends: 76 [2022-07-23 13:24:23,653 INFO L226 Difference]: Without dead ends: 75 [2022-07-23 13:24:23,653 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 [2022-07-23 13:24:23,654 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 [2022-07-23 13:24:23,655 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] [2022-07-23 13:24:23,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-23 13:24:23,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2022-07-23 13:24:23,671 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) [2022-07-23 13:24:23,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-07-23 13:24:23,674 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 9 [2022-07-23 13:24:23,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:23,674 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-07-23 13:24:23,674 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) [2022-07-23 13:24:23,675 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-07-23 13:24:23,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 13:24:23,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:23,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:24:23,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-23 13:24:23,676 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:23,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:23,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2022-07-23 13:24:23,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:23,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623337464] [2022-07-23 13:24:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:23,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:23,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:23,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623337464] [2022-07-23 13:24:23,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623337464] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:24:23,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:24:23,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:24:23,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302996643] [2022-07-23 13:24:23,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:24:23,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 13:24:23,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:23,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 13:24:23,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:24:23,747 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) [2022-07-23 13:24:23,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:23,813 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2022-07-23 13:24:23,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 13:24:23,814 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 [2022-07-23 13:24:23,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:23,815 INFO L225 Difference]: With dead ends: 116 [2022-07-23 13:24:23,815 INFO L226 Difference]: Without dead ends: 108 [2022-07-23 13:24:23,816 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 [2022-07-23 13:24:23,817 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 [2022-07-23 13:24:23,817 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] [2022-07-23 13:24:23,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-23 13:24:23,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-07-23 13:24:23,831 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) [2022-07-23 13:24:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2022-07-23 13:24:23,832 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 10 [2022-07-23 13:24:23,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:23,833 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2022-07-23 13:24:23,833 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) [2022-07-23 13:24:23,833 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2022-07-23 13:24:23,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 13:24:23,833 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:23,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:24:23,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-23 13:24:23,834 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:23,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:23,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1072007509, now seen corresponding path program 1 times [2022-07-23 13:24:23,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:23,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844574073] [2022-07-23 13:24:23,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:23,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:23,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:23,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844574073] [2022-07-23 13:24:23,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844574073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:24:23,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:24:23,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:24:23,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018351119] [2022-07-23 13:24:23,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:24:23,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 13:24:23,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:23,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 13:24:23,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:24:23,876 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) [2022-07-23 13:24:23,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:23,947 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2022-07-23 13:24:23,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 13:24:23,947 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 [2022-07-23 13:24:23,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:23,949 INFO L225 Difference]: With dead ends: 109 [2022-07-23 13:24:23,949 INFO L226 Difference]: Without dead ends: 108 [2022-07-23 13:24:23,949 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 [2022-07-23 13:24:23,951 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 [2022-07-23 13:24:23,952 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] [2022-07-23 13:24:23,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-23 13:24:23,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-07-23 13:24:23,968 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) [2022-07-23 13:24:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2022-07-23 13:24:23,969 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 12 [2022-07-23 13:24:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:23,969 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2022-07-23 13:24:23,970 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) [2022-07-23 13:24:23,970 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2022-07-23 13:24:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-23 13:24:23,970 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:23,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:24:23,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-23 13:24:23,971 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:23,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:23,971 INFO L85 PathProgramCache]: Analyzing trace with hash 219392943, now seen corresponding path program 1 times [2022-07-23 13:24:23,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:23,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918527633] [2022-07-23 13:24:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:23,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:24,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:24,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918527633] [2022-07-23 13:24:24,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918527633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:24:24,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:24:24,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:24:24,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099699226] [2022-07-23 13:24:24,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:24:24,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:24:24,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:24,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:24:24,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:24:24,026 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) [2022-07-23 13:24:24,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:24,082 INFO L93 Difference]: Finished difference Result 174 states and 233 transitions. [2022-07-23 13:24:24,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 13:24:24,083 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 [2022-07-23 13:24:24,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:24,084 INFO L225 Difference]: With dead ends: 174 [2022-07-23 13:24:24,084 INFO L226 Difference]: Without dead ends: 103 [2022-07-23 13:24:24,088 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 [2022-07-23 13:24:24,091 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 30 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:24:24,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 77 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:24:24,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-23 13:24:24,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2022-07-23 13:24:24,101 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) [2022-07-23 13:24:24,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2022-07-23 13:24:24,103 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 16 [2022-07-23 13:24:24,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:24,103 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2022-07-23 13:24:24,104 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) [2022-07-23 13:24:24,104 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2022-07-23 13:24:24,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-23 13:24:24,106 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:24,107 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:24:24,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-23 13:24:24,107 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:24,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:24,108 INFO L85 PathProgramCache]: Analyzing trace with hash 219399894, now seen corresponding path program 1 times [2022-07-23 13:24:24,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:24,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735615964] [2022-07-23 13:24:24,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:24,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:24,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:24,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735615964] [2022-07-23 13:24:24,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735615964] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:24,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011713695] [2022-07-23 13:24:24,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:24,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:24,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:24,177 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) [2022-07-23 13:24:24,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-23 13:24:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:24,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 13:24:24,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:24,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:24:24,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:24,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011713695] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:24:24,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:24:24,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-23 13:24:24,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631097154] [2022-07-23 13:24:24,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:24:24,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 13:24:24,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:24,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 13:24:24,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-23 13:24:24,397 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) [2022-07-23 13:24:24,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:24,668 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2022-07-23 13:24:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 13:24:24,669 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 [2022-07-23 13:24:24,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:24,674 INFO L225 Difference]: With dead ends: 274 [2022-07-23 13:24:24,675 INFO L226 Difference]: Without dead ends: 272 [2022-07-23 13:24:24,675 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 [2022-07-23 13:24:24,676 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, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 13:24:24,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 193 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 13:24:24,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-07-23 13:24:24,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2022-07-23 13:24:24,719 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) [2022-07-23 13:24:24,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2022-07-23 13:24:24,724 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 16 [2022-07-23 13:24:24,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:24,724 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2022-07-23 13:24:24,724 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) [2022-07-23 13:24:24,725 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2022-07-23 13:24:24,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 13:24:24,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:24,726 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:24:24,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-23 13:24:24,943 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 [2022-07-23 13:24:24,944 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:24,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:24,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1162887243, now seen corresponding path program 1 times [2022-07-23 13:24:24,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:24,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264620668] [2022-07-23 13:24:24,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:24,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:24,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:24,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264620668] [2022-07-23 13:24:24,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264620668] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:24,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214989087] [2022-07-23 13:24:24,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:24,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:24,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:24,991 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) [2022-07-23 13:24:25,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-23 13:24:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:25,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 13:24:25,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:25,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:24:25,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214989087] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:24:25,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 13:24:25,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-07-23 13:24:25,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957330680] [2022-07-23 13:24:25,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:24:25,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 13:24:25,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:25,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 13:24:25,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-23 13:24:25,081 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) [2022-07-23 13:24:25,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:25,166 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2022-07-23 13:24:25,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 13:24:25,167 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 [2022-07-23 13:24:25,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:25,170 INFO L225 Difference]: With dead ends: 328 [2022-07-23 13:24:25,170 INFO L226 Difference]: Without dead ends: 327 [2022-07-23 13:24:25,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-23 13:24:25,171 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 [2022-07-23 13:24:25,171 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] [2022-07-23 13:24:25,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-07-23 13:24:25,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2022-07-23 13:24:25,192 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) [2022-07-23 13:24:25,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2022-07-23 13:24:25,195 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 17 [2022-07-23 13:24:25,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:25,195 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2022-07-23 13:24:25,195 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) [2022-07-23 13:24:25,196 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2022-07-23 13:24:25,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-23 13:24:25,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:25,197 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:24:25,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-23 13:24:25,411 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 [2022-07-23 13:24:25,412 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:25,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:25,412 INFO L85 PathProgramCache]: Analyzing trace with hash 523262015, now seen corresponding path program 1 times [2022-07-23 13:24:25,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:25,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599434164] [2022-07-23 13:24:25,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:25,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:25,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:25,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599434164] [2022-07-23 13:24:25,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599434164] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:25,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451264590] [2022-07-23 13:24:25,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:25,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:25,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:25,472 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) [2022-07-23 13:24:25,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-23 13:24:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:25,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 13:24:25,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:25,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:24:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:25,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451264590] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:24:25,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:24:25,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-23 13:24:25,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637808929] [2022-07-23 13:24:25,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:24:25,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 13:24:25,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:25,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 13:24:25,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-23 13:24:25,627 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) [2022-07-23 13:24:25,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:25,851 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2022-07-23 13:24:25,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 13:24:25,852 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 [2022-07-23 13:24:25,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:25,855 INFO L225 Difference]: With dead ends: 591 [2022-07-23 13:24:25,856 INFO L226 Difference]: Without dead ends: 590 [2022-07-23 13:24:25,856 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 [2022-07-23 13:24:25,857 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 [2022-07-23 13:24:25,857 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] [2022-07-23 13:24:25,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-07-23 13:24:25,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2022-07-23 13:24:25,892 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) [2022-07-23 13:24:25,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2022-07-23 13:24:25,896 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 20 [2022-07-23 13:24:25,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:25,896 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2022-07-23 13:24:25,896 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) [2022-07-23 13:24:25,897 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2022-07-23 13:24:25,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-23 13:24:25,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:25,898 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] [2022-07-23 13:24:25,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-23 13:24:26,103 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 [2022-07-23 13:24:26,104 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:26,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:26,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2022-07-23 13:24:26,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:26,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325306701] [2022-07-23 13:24:26,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:26,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:26,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 13:24:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 13:24:26,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:26,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325306701] [2022-07-23 13:24:26,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325306701] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:26,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254086458] [2022-07-23 13:24:26,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:26,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:26,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:26,166 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) [2022-07-23 13:24:26,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-23 13:24:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:26,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 13:24:26,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 13:24:26,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:24:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 13:24:26,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254086458] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:24:26,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:24:26,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-07-23 13:24:26,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326612610] [2022-07-23 13:24:26,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:24:26,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-23 13:24:26,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:26,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-23 13:24:26,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-07-23 13:24:26,469 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) [2022-07-23 13:24:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:27,090 INFO L93 Difference]: Finished difference Result 1286 states and 1798 transitions. [2022-07-23 13:24:27,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-23 13:24:27,091 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 [2022-07-23 13:24:27,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:27,095 INFO L225 Difference]: With dead ends: 1286 [2022-07-23 13:24:27,095 INFO L226 Difference]: Without dead ends: 895 [2022-07-23 13:24:27,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-07-23 13:24:27,099 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 [2022-07-23 13:24:27,099 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] [2022-07-23 13:24:27,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-07-23 13:24:27,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 701. [2022-07-23 13:24:27,143 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) [2022-07-23 13:24:27,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 862 transitions. [2022-07-23 13:24:27,148 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 862 transitions. Word has length 24 [2022-07-23 13:24:27,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:27,149 INFO L495 AbstractCegarLoop]: Abstraction has 701 states and 862 transitions. [2022-07-23 13:24:27,149 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) [2022-07-23 13:24:27,149 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 862 transitions. [2022-07-23 13:24:27,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-23 13:24:27,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:27,150 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] [2022-07-23 13:24:27,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-23 13:24:27,363 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 [2022-07-23 13:24:27,363 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:27,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:27,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1583952330, now seen corresponding path program 1 times [2022-07-23 13:24:27,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:27,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728986427] [2022-07-23 13:24:27,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:27,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:27,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 13:24:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 13:24:27,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:27,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728986427] [2022-07-23 13:24:27,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728986427] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:27,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900870791] [2022-07-23 13:24:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:27,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:27,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:27,426 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) [2022-07-23 13:24:27,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-23 13:24:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:27,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 13:24:27,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 13:24:27,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:24:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 13:24:27,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900870791] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:27,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-23 13:24:27,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2022-07-23 13:24:27,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828725495] [2022-07-23 13:24:27,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:24:27,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 13:24:27,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:27,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 13:24:27,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-23 13:24:27,601 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) [2022-07-23 13:24:27,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:27,796 INFO L93 Difference]: Finished difference Result 776 states and 987 transitions. [2022-07-23 13:24:27,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 13:24:27,796 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 [2022-07-23 13:24:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:27,800 INFO L225 Difference]: With dead ends: 776 [2022-07-23 13:24:27,800 INFO L226 Difference]: Without dead ends: 775 [2022-07-23 13:24:27,801 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 [2022-07-23 13:24:27,802 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 65 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:24:27,802 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] [2022-07-23 13:24:27,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-07-23 13:24:27,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 722. [2022-07-23 13:24:27,847 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) [2022-07-23 13:24:27,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 888 transitions. [2022-07-23 13:24:27,851 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 888 transitions. Word has length 28 [2022-07-23 13:24:27,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:27,851 INFO L495 AbstractCegarLoop]: Abstraction has 722 states and 888 transitions. [2022-07-23 13:24:27,852 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) [2022-07-23 13:24:27,852 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 888 transitions. [2022-07-23 13:24:27,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-23 13:24:27,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:27,853 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] [2022-07-23 13:24:27,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-23 13:24:28,067 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 [2022-07-23 13:24:28,068 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:28,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:28,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1777813581, now seen corresponding path program 1 times [2022-07-23 13:24:28,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:28,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159799709] [2022-07-23 13:24:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:28,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:28,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 13:24:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:28,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-23 13:24:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 13:24:28,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:28,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159799709] [2022-07-23 13:24:28,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159799709] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:28,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405248649] [2022-07-23 13:24:28,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:28,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:28,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:28,160 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) [2022-07-23 13:24:28,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-23 13:24:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:28,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 13:24:28,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 13:24:28,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:24:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 13:24:28,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405248649] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:24:28,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:24:28,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-07-23 13:24:28,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531247641] [2022-07-23 13:24:28,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:24:28,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-23 13:24:28,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:28,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-23 13:24:28,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-23 13:24:28,444 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) [2022-07-23 13:24:28,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:28,976 INFO L93 Difference]: Finished difference Result 1150 states and 1701 transitions. [2022-07-23 13:24:28,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 13:24:28,976 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 [2022-07-23 13:24:28,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:28,982 INFO L225 Difference]: With dead ends: 1150 [2022-07-23 13:24:28,983 INFO L226 Difference]: Without dead ends: 1148 [2022-07-23 13:24:28,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2022-07-23 13:24:28,984 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, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 13:24:28,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 209 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 13:24:28,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-07-23 13:24:29,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 976. [2022-07-23 13:24:29,052 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) [2022-07-23 13:24:29,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1319 transitions. [2022-07-23 13:24:29,061 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1319 transitions. Word has length 33 [2022-07-23 13:24:29,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:29,061 INFO L495 AbstractCegarLoop]: Abstraction has 976 states and 1319 transitions. [2022-07-23 13:24:29,061 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) [2022-07-23 13:24:29,062 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1319 transitions. [2022-07-23 13:24:29,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-23 13:24:29,063 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:29,063 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] [2022-07-23 13:24:29,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-23 13:24:29,286 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 [2022-07-23 13:24:29,287 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:29,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:29,287 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2022-07-23 13:24:29,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:29,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386918643] [2022-07-23 13:24:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:29,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:29,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 13:24:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:29,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-23 13:24:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 13:24:29,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:29,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386918643] [2022-07-23 13:24:29,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386918643] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:29,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306356929] [2022-07-23 13:24:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:29,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:29,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:29,366 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) [2022-07-23 13:24:29,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-23 13:24:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:29,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 13:24:29,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 13:24:29,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:24:29,624 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 13:24:29,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306356929] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:29,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-23 13:24:29,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2022-07-23 13:24:29,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567667922] [2022-07-23 13:24:29,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:24:29,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 13:24:29,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:29,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 13:24:29,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-07-23 13:24:29,626 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) [2022-07-23 13:24:29,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:29,858 INFO L93 Difference]: Finished difference Result 1019 states and 1361 transitions. [2022-07-23 13:24:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 13:24:29,859 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 [2022-07-23 13:24:29,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:29,864 INFO L225 Difference]: With dead ends: 1019 [2022-07-23 13:24:29,864 INFO L226 Difference]: Without dead ends: 1018 [2022-07-23 13:24:29,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-07-23 13:24:29,865 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 [2022-07-23 13:24:29,865 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] [2022-07-23 13:24:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-07-23 13:24:29,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 975. [2022-07-23 13:24:29,929 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) [2022-07-23 13:24:29,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1311 transitions. [2022-07-23 13:24:29,936 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1311 transitions. Word has length 34 [2022-07-23 13:24:29,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:29,937 INFO L495 AbstractCegarLoop]: Abstraction has 975 states and 1311 transitions. [2022-07-23 13:24:29,937 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) [2022-07-23 13:24:29,937 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1311 transitions. [2022-07-23 13:24:29,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 13:24:29,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:29,940 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] [2022-07-23 13:24:29,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-23 13:24:30,163 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 [2022-07-23 13:24:30,164 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:30,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:30,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1227703372, now seen corresponding path program 2 times [2022-07-23 13:24:30,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:30,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109588817] [2022-07-23 13:24:30,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:30,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:30,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 13:24:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 13:24:30,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:30,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109588817] [2022-07-23 13:24:30,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109588817] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:30,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826599550] [2022-07-23 13:24:30,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 13:24:30,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:30,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:30,246 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) [2022-07-23 13:24:30,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-23 13:24:30,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 13:24:30,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:24:30,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 13:24:30,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 13:24:30,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:24:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 13:24:30,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826599550] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:24:30,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:24:30,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-23 13:24:30,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932467196] [2022-07-23 13:24:30,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:24:30,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-23 13:24:30,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:30,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-23 13:24:30,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-23 13:24:30,493 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) [2022-07-23 13:24:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:30,907 INFO L93 Difference]: Finished difference Result 1182 states and 1575 transitions. [2022-07-23 13:24:30,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-23 13:24:30,907 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 [2022-07-23 13:24:30,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:30,913 INFO L225 Difference]: With dead ends: 1182 [2022-07-23 13:24:30,914 INFO L226 Difference]: Without dead ends: 1181 [2022-07-23 13:24:30,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=754, Unknown=0, NotChecked=0, Total=992 [2022-07-23 13:24:30,916 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 210 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 13:24:30,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 176 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 13:24:30,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-07-23 13:24:31,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1029. [2022-07-23 13:24:31,002 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) [2022-07-23 13:24:31,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1373 transitions. [2022-07-23 13:24:31,011 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1373 transitions. Word has length 36 [2022-07-23 13:24:31,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:31,011 INFO L495 AbstractCegarLoop]: Abstraction has 1029 states and 1373 transitions. [2022-07-23 13:24:31,011 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) [2022-07-23 13:24:31,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1373 transitions. [2022-07-23 13:24:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-23 13:24:31,013 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:31,013 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] [2022-07-23 13:24:31,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-23 13:24:31,242 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 [2022-07-23 13:24:31,242 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:31,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:31,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1699542727, now seen corresponding path program 1 times [2022-07-23 13:24:31,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:31,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908809846] [2022-07-23 13:24:31,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:31,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:31,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 13:24:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:31,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-23 13:24:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 13:24:31,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:31,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908809846] [2022-07-23 13:24:31,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908809846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:31,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570355661] [2022-07-23 13:24:31,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:31,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:31,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:31,338 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) [2022-07-23 13:24:31,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-23 13:24:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:31,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 13:24:31,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 13:24:31,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:24:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 13:24:31,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570355661] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:31,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-23 13:24:31,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2022-07-23 13:24:31,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781770038] [2022-07-23 13:24:31,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:24:31,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 13:24:31,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:31,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 13:24:31,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-07-23 13:24:31,605 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) [2022-07-23 13:24:31,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:31,881 INFO L93 Difference]: Finished difference Result 1140 states and 1577 transitions. [2022-07-23 13:24:31,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 13:24:31,882 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 [2022-07-23 13:24:31,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:31,888 INFO L225 Difference]: With dead ends: 1140 [2022-07-23 13:24:31,888 INFO L226 Difference]: Without dead ends: 1139 [2022-07-23 13:24:31,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-07-23 13:24:31,890 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 [2022-07-23 13:24:31,891 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] [2022-07-23 13:24:31,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-07-23 13:24:31,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1037. [2022-07-23 13:24:31,978 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) [2022-07-23 13:24:31,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1322 transitions. [2022-07-23 13:24:31,985 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1322 transitions. Word has length 37 [2022-07-23 13:24:31,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:31,987 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 1322 transitions. [2022-07-23 13:24:31,987 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) [2022-07-23 13:24:31,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1322 transitions. [2022-07-23 13:24:31,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-23 13:24:31,989 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:31,989 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-23 13:24:32,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-23 13:24:32,203 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 [2022-07-23 13:24:32,204 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:32,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:32,204 INFO L85 PathProgramCache]: Analyzing trace with hash -151680771, now seen corresponding path program 2 times [2022-07-23 13:24:32,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:32,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813919032] [2022-07-23 13:24:32,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:32,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:32,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:32,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813919032] [2022-07-23 13:24:32,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813919032] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:32,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340085689] [2022-07-23 13:24:32,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 13:24:32,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:32,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:32,315 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) [2022-07-23 13:24:32,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-23 13:24:32,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 13:24:32,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:24:32,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 13:24:32,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:32,411 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:32,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:24:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:32,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340085689] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:24:32,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:24:32,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-07-23 13:24:32,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525557271] [2022-07-23 13:24:32,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:24:32,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 13:24:32,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:32,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 13:24:32,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-07-23 13:24:32,582 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) [2022-07-23 13:24:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:33,240 INFO L93 Difference]: Finished difference Result 2055 states and 2762 transitions. [2022-07-23 13:24:33,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-23 13:24:33,240 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 [2022-07-23 13:24:33,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:33,254 INFO L225 Difference]: With dead ends: 2055 [2022-07-23 13:24:33,254 INFO L226 Difference]: Without dead ends: 2054 [2022-07-23 13:24:33,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-07-23 13:24:33,257 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 418 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-07-23 13:24:33,257 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] [2022-07-23 13:24:33,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2022-07-23 13:24:33,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1759. [2022-07-23 13:24:33,399 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) [2022-07-23 13:24:33,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 2203 transitions. [2022-07-23 13:24:33,409 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 2203 transitions. Word has length 44 [2022-07-23 13:24:33,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:33,409 INFO L495 AbstractCegarLoop]: Abstraction has 1759 states and 2203 transitions. [2022-07-23 13:24:33,410 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) [2022-07-23 13:24:33,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 2203 transitions. [2022-07-23 13:24:33,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-23 13:24:33,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:33,412 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] [2022-07-23 13:24:33,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-23 13:24:33,627 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 [2022-07-23 13:24:33,627 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:33,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:33,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1560392739, now seen corresponding path program 2 times [2022-07-23 13:24:33,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:33,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068604797] [2022-07-23 13:24:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:33,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:33,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 13:24:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:33,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-23 13:24:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 13:24:33,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:33,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068604797] [2022-07-23 13:24:33,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068604797] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:33,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214681258] [2022-07-23 13:24:33,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 13:24:33,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:33,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:33,728 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) [2022-07-23 13:24:33,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-23 13:24:33,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 13:24:33,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:24:33,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 13:24:33,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 13:24:33,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:24:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 13:24:34,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214681258] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:24:34,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:24:34,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-07-23 13:24:34,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325024343] [2022-07-23 13:24:34,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:24:34,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-23 13:24:34,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:34,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-23 13:24:34,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-07-23 13:24:34,017 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) [2022-07-23 13:24:35,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:35,234 INFO L93 Difference]: Finished difference Result 3798 states and 5493 transitions. [2022-07-23 13:24:35,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-23 13:24:35,234 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 [2022-07-23 13:24:35,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:35,248 INFO L225 Difference]: With dead ends: 3798 [2022-07-23 13:24:35,248 INFO L226 Difference]: Without dead ends: 2636 [2022-07-23 13:24:35,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2022-07-23 13:24:35,257 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 230 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 13:24:35,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 315 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 13:24:35,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2022-07-23 13:24:35,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 1939. [2022-07-23 13:24:35,428 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) [2022-07-23 13:24:35,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 2410 transitions. [2022-07-23 13:24:35,435 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 2410 transitions. Word has length 45 [2022-07-23 13:24:35,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:35,435 INFO L495 AbstractCegarLoop]: Abstraction has 1939 states and 2410 transitions. [2022-07-23 13:24:35,436 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) [2022-07-23 13:24:35,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 2410 transitions. [2022-07-23 13:24:35,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-23 13:24:35,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:35,438 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] [2022-07-23 13:24:35,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-23 13:24:35,652 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 [2022-07-23 13:24:35,652 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:35,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:35,653 INFO L85 PathProgramCache]: Analyzing trace with hash -242379077, now seen corresponding path program 1 times [2022-07-23 13:24:35,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:35,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590908770] [2022-07-23 13:24:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:35,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:35,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-23 13:24:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-23 13:24:35,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:35,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590908770] [2022-07-23 13:24:35,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590908770] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:35,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573174855] [2022-07-23 13:24:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:35,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:35,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:35,723 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) [2022-07-23 13:24:35,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-23 13:24:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:35,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 13:24:35,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 13:24:35,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:24:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 13:24:35,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573174855] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:24:35,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:24:35,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-07-23 13:24:35,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142694018] [2022-07-23 13:24:35,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:24:35,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-23 13:24:35,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:35,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-23 13:24:35,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-07-23 13:24:35,903 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) [2022-07-23 13:24:36,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:36,518 INFO L93 Difference]: Finished difference Result 2482 states and 3263 transitions. [2022-07-23 13:24:36,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-23 13:24:36,519 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 [2022-07-23 13:24:36,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:36,530 INFO L225 Difference]: With dead ends: 2482 [2022-07-23 13:24:36,530 INFO L226 Difference]: Without dead ends: 2379 [2022-07-23 13:24:36,532 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 [2022-07-23 13:24:36,533 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 [2022-07-23 13:24:36,533 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] [2022-07-23 13:24:36,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2022-07-23 13:24:36,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 1873. [2022-07-23 13:24:36,689 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) [2022-07-23 13:24:36,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 2328 transitions. [2022-07-23 13:24:36,696 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 2328 transitions. Word has length 52 [2022-07-23 13:24:36,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:36,696 INFO L495 AbstractCegarLoop]: Abstraction has 1873 states and 2328 transitions. [2022-07-23 13:24:36,696 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) [2022-07-23 13:24:36,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 2328 transitions. [2022-07-23 13:24:36,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-23 13:24:36,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:36,698 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] [2022-07-23 13:24:36,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-23 13:24:36,922 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 [2022-07-23 13:24:36,922 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:36,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:36,923 INFO L85 PathProgramCache]: Analyzing trace with hash 442862615, now seen corresponding path program 1 times [2022-07-23 13:24:36,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:36,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328425637] [2022-07-23 13:24:36,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:36,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:36,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 13:24:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:36,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 13:24:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:37,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-23 13:24:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:37,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-23 13:24:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-23 13:24:37,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:37,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328425637] [2022-07-23 13:24:37,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328425637] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:37,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875616544] [2022-07-23 13:24:37,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:37,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:37,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:37,069 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) [2022-07-23 13:24:37,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-23 13:24:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:37,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 13:24:37,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-23 13:24:37,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:24:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-23 13:24:37,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875616544] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:24:37,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:24:37,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-07-23 13:24:37,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099894154] [2022-07-23 13:24:37,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:24:37,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-23 13:24:37,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:37,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-23 13:24:37,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-07-23 13:24:37,584 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) [2022-07-23 13:24:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:39,068 INFO L93 Difference]: Finished difference Result 4363 states and 7674 transitions. [2022-07-23 13:24:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-23 13:24:39,069 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 [2022-07-23 13:24:39,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:39,103 INFO L225 Difference]: With dead ends: 4363 [2022-07-23 13:24:39,103 INFO L226 Difference]: Without dead ends: 4361 [2022-07-23 13:24:39,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2022-07-23 13:24:39,110 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 171 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 13:24:39,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 219 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 13:24:39,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2022-07-23 13:24:39,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 3183. [2022-07-23 13:24:39,450 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) [2022-07-23 13:24:39,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 6139 transitions. [2022-07-23 13:24:39,470 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 6139 transitions. Word has length 52 [2022-07-23 13:24:39,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:39,470 INFO L495 AbstractCegarLoop]: Abstraction has 3183 states and 6139 transitions. [2022-07-23 13:24:39,471 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) [2022-07-23 13:24:39,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 6139 transitions. [2022-07-23 13:24:39,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-23 13:24:39,473 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:39,473 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] [2022-07-23 13:24:39,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-23 13:24:39,696 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 [2022-07-23 13:24:39,696 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:39,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:39,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1812635000, now seen corresponding path program 3 times [2022-07-23 13:24:39,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:39,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559030893] [2022-07-23 13:24:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:39,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:39,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-23 13:24:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 75 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 13:24:39,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:39,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559030893] [2022-07-23 13:24:39,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559030893] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:39,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599978632] [2022-07-23 13:24:39,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 13:24:39,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:39,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:39,836 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) [2022-07-23 13:24:39,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-23 13:24:39,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-23 13:24:39,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:24:39,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-23 13:24:39,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 75 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 13:24:39,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:24:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 13:24:40,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599978632] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:24:40,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:24:40,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-07-23 13:24:40,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13377191] [2022-07-23 13:24:40,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:24:40,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-23 13:24:40,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:40,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-23 13:24:40,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-07-23 13:24:40,166 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) [2022-07-23 13:24:40,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:40,930 INFO L93 Difference]: Finished difference Result 3643 states and 6775 transitions. [2022-07-23 13:24:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-23 13:24:40,931 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 [2022-07-23 13:24:40,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:40,955 INFO L225 Difference]: With dead ends: 3643 [2022-07-23 13:24:40,955 INFO L226 Difference]: Without dead ends: 3642 [2022-07-23 13:24:40,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=634, Invalid=1916, Unknown=0, NotChecked=0, Total=2550 [2022-07-23 13:24:40,960 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 [2022-07-23 13:24:40,960 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] [2022-07-23 13:24:40,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3642 states. [2022-07-23 13:24:41,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3642 to 3211. [2022-07-23 13:24:41,259 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) [2022-07-23 13:24:41,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3211 states to 3211 states and 6170 transitions. [2022-07-23 13:24:41,278 INFO L78 Accepts]: Start accepts. Automaton has 3211 states and 6170 transitions. Word has length 52 [2022-07-23 13:24:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:41,279 INFO L495 AbstractCegarLoop]: Abstraction has 3211 states and 6170 transitions. [2022-07-23 13:24:41,279 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) [2022-07-23 13:24:41,279 INFO L276 IsEmpty]: Start isEmpty. Operand 3211 states and 6170 transitions. [2022-07-23 13:24:41,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-23 13:24:41,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:41,281 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-23 13:24:41,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-23 13:24:41,505 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 [2022-07-23 13:24:41,505 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:41,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1991697283, now seen corresponding path program 1 times [2022-07-23 13:24:41,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:41,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892648834] [2022-07-23 13:24:41,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:41,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-23 13:24:41,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:41,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892648834] [2022-07-23 13:24:41,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892648834] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:41,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582309879] [2022-07-23 13:24:41,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:41,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:41,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:41,637 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) [2022-07-23 13:24:41,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-23 13:24:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:41,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 13:24:41,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-23 13:24:41,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:24:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-23 13:24:41,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582309879] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:24:41,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:24:41,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-07-23 13:24:41,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219742267] [2022-07-23 13:24:41,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:24:41,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 13:24:41,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:41,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 13:24:41,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-07-23 13:24:41,914 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) [2022-07-23 13:24:43,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:43,033 INFO L93 Difference]: Finished difference Result 9377 states and 17636 transitions. [2022-07-23 13:24:43,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-23 13:24:43,034 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 [2022-07-23 13:24:43,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:43,094 INFO L225 Difference]: With dead ends: 9377 [2022-07-23 13:24:43,095 INFO L226 Difference]: Without dead ends: 9376 [2022-07-23 13:24:43,100 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 [2022-07-23 13:24:43,101 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 676 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-07-23 13:24:43,102 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] [2022-07-23 13:24:43,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9376 states. [2022-07-23 13:24:43,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9376 to 8659. [2022-07-23 13:24:43,949 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) [2022-07-23 13:24:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8659 states to 8659 states and 16478 transitions. [2022-07-23 13:24:44,017 INFO L78 Accepts]: Start accepts. Automaton has 8659 states and 16478 transitions. Word has length 58 [2022-07-23 13:24:44,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:44,018 INFO L495 AbstractCegarLoop]: Abstraction has 8659 states and 16478 transitions. [2022-07-23 13:24:44,018 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) [2022-07-23 13:24:44,018 INFO L276 IsEmpty]: Start isEmpty. Operand 8659 states and 16478 transitions. [2022-07-23 13:24:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-23 13:24:44,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:44,026 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] [2022-07-23 13:24:44,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-23 13:24:44,238 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 [2022-07-23 13:24:44,239 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:44,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:44,239 INFO L85 PathProgramCache]: Analyzing trace with hash 526800899, now seen corresponding path program 1 times [2022-07-23 13:24:44,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:44,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785813359] [2022-07-23 13:24:44,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:44,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:44,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 13:24:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:44,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 13:24:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:44,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-23 13:24:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:44,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-23 13:24:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-23 13:24:44,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:44,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785813359] [2022-07-23 13:24:44,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785813359] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:44,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759915016] [2022-07-23 13:24:44,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:44,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:44,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:44,379 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) [2022-07-23 13:24:44,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-23 13:24:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:44,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 13:24:44,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-23 13:24:44,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:24:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-23 13:24:44,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759915016] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:24:44,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:24:44,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-07-23 13:24:44,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870905512] [2022-07-23 13:24:44,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:24:44,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-23 13:24:44,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:44,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-23 13:24:44,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-07-23 13:24:44,917 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) [2022-07-23 13:24:47,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:47,482 INFO L93 Difference]: Finished difference Result 30203 states and 100302 transitions. [2022-07-23 13:24:47,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-23 13:24:47,483 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 [2022-07-23 13:24:47,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:47,770 INFO L225 Difference]: With dead ends: 30203 [2022-07-23 13:24:47,771 INFO L226 Difference]: Without dead ends: 22210 [2022-07-23 13:24:48,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=906, Invalid=3516, Unknown=0, NotChecked=0, Total=4422 [2022-07-23 13:24:48,051 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 129 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-07-23 13:24:48,052 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] [2022-07-23 13:24:48,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22210 states. [2022-07-23 13:24:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22210 to 17565. [2022-07-23 13:24:50,437 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) [2022-07-23 13:24:50,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17565 states to 17565 states and 59757 transitions. [2022-07-23 13:24:50,800 INFO L78 Accepts]: Start accepts. Automaton has 17565 states and 59757 transitions. Word has length 56 [2022-07-23 13:24:50,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:50,801 INFO L495 AbstractCegarLoop]: Abstraction has 17565 states and 59757 transitions. [2022-07-23 13:24:50,801 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) [2022-07-23 13:24:50,801 INFO L276 IsEmpty]: Start isEmpty. Operand 17565 states and 59757 transitions. [2022-07-23 13:24:50,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-23 13:24:50,807 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:50,807 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:24:50,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-23 13:24:51,023 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 [2022-07-23 13:24:51,023 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:51,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:51,024 INFO L85 PathProgramCache]: Analyzing trace with hash 55857866, now seen corresponding path program 2 times [2022-07-23 13:24:51,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:51,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74013255] [2022-07-23 13:24:51,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:51,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:51,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 13:24:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:51,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-23 13:24:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:51,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 13:24:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:51,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-23 13:24:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:51,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-23 13:24:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-23 13:24:51,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:51,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74013255] [2022-07-23 13:24:51,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74013255] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:51,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775387291] [2022-07-23 13:24:51,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 13:24:51,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:51,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:51,216 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) [2022-07-23 13:24:51,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-23 13:24:51,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 13:24:51,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:24:51,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-23 13:24:51,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 23 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-23 13:24:51,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:24:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 80 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-23 13:24:51,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775387291] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:24:51,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:24:51,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2022-07-23 13:24:51,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192136459] [2022-07-23 13:24:51,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:24:51,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-23 13:24:51,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:51,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-23 13:24:51,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-07-23 13:24:51,983 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) [2022-07-23 13:24:54,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:54,192 INFO L93 Difference]: Finished difference Result 29426 states and 97217 transitions. [2022-07-23 13:24:54,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-23 13:24:54,193 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 73 [2022-07-23 13:24:54,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:54,258 INFO L225 Difference]: With dead ends: 29426 [2022-07-23 13:24:54,258 INFO L226 Difference]: Without dead ends: 12522 [2022-07-23 13:24:54,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2022-07-23 13:24:54,477 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 133 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 13:24:54,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 386 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 13:24:54,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12522 states. [2022-07-23 13:24:55,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12522 to 11029. [2022-07-23 13:24:55,637 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) [2022-07-23 13:24:55,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11029 states to 11029 states and 16595 transitions. [2022-07-23 13:24:55,692 INFO L78 Accepts]: Start accepts. Automaton has 11029 states and 16595 transitions. Word has length 73 [2022-07-23 13:24:55,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:55,693 INFO L495 AbstractCegarLoop]: Abstraction has 11029 states and 16595 transitions. [2022-07-23 13:24:55,693 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) [2022-07-23 13:24:55,693 INFO L276 IsEmpty]: Start isEmpty. Operand 11029 states and 16595 transitions. [2022-07-23 13:24:55,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-23 13:24:55,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:55,698 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] [2022-07-23 13:24:55,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-23 13:24:55,911 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 [2022-07-23 13:24:55,912 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:55,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:55,912 INFO L85 PathProgramCache]: Analyzing trace with hash 821485916, now seen corresponding path program 4 times [2022-07-23 13:24:55,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:55,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641348149] [2022-07-23 13:24:55,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:55,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:56,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-23 13:24:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 13:24:56,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:56,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641348149] [2022-07-23 13:24:56,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641348149] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:56,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488217195] [2022-07-23 13:24:56,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 13:24:56,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:56,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:56,060 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) [2022-07-23 13:24:56,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-23 13:24:56,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 13:24:56,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:24:56,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-23 13:24:56,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 106 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-23 13:24:56,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:24:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 106 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-23 13:24:56,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488217195] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:24:56,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:24:56,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 23 [2022-07-23 13:24:56,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318529086] [2022-07-23 13:24:56,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:24:56,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-23 13:24:56,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:56,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-23 13:24:56,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-07-23 13:24:56,279 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) [2022-07-23 13:24:57,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:57,397 INFO L93 Difference]: Finished difference Result 11563 states and 17375 transitions. [2022-07-23 13:24:57,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-23 13:24:57,398 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 [2022-07-23 13:24:57,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:57,430 INFO L225 Difference]: With dead ends: 11563 [2022-07-23 13:24:57,431 INFO L226 Difference]: Without dead ends: 9324 [2022-07-23 13:24:57,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=374, Invalid=1348, Unknown=0, NotChecked=0, Total=1722 [2022-07-23 13:24:57,441 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 313 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 13:24:57,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 100 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 13:24:57,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9324 states. [2022-07-23 13:24:58,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9324 to 8758. [2022-07-23 13:24:58,061 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) [2022-07-23 13:24:58,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8758 states to 8758 states and 13785 transitions. [2022-07-23 13:24:58,101 INFO L78 Accepts]: Start accepts. Automaton has 8758 states and 13785 transitions. Word has length 68 [2022-07-23 13:24:58,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:58,102 INFO L495 AbstractCegarLoop]: Abstraction has 8758 states and 13785 transitions. [2022-07-23 13:24:58,102 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) [2022-07-23 13:24:58,102 INFO L276 IsEmpty]: Start isEmpty. Operand 8758 states and 13785 transitions. [2022-07-23 13:24:58,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-23 13:24:58,105 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:58,105 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] [2022-07-23 13:24:58,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-23 13:24:58,317 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 [2022-07-23 13:24:58,317 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:24:58,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:58,318 INFO L85 PathProgramCache]: Analyzing trace with hash -131434271, now seen corresponding path program 3 times [2022-07-23 13:24:58,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:58,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349059130] [2022-07-23 13:24:58,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:58,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:58,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 13:24:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:58,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-23 13:24:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 13:24:58,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:58,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349059130] [2022-07-23 13:24:58,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349059130] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:58,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694127539] [2022-07-23 13:24:58,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 13:24:58,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:58,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:58,463 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) [2022-07-23 13:24:58,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-23 13:24:58,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-23 13:24:58,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:24:58,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-23 13:24:58,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 13:24:58,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:24:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 65 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 13:24:58,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694127539] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:24:58,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:24:58,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-07-23 13:24:58,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218360032] [2022-07-23 13:24:58,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:24:58,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-23 13:24:58,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:58,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-23 13:24:58,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-07-23 13:24:58,940 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) [2022-07-23 13:25:00,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:25:00,090 INFO L93 Difference]: Finished difference Result 9409 states and 14783 transitions. [2022-07-23 13:25:00,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-23 13:25:00,090 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 [2022-07-23 13:25:00,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:25:00,122 INFO L225 Difference]: With dead ends: 9409 [2022-07-23 13:25:00,122 INFO L226 Difference]: Without dead ends: 9408 [2022-07-23 13:25:00,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2022-07-23 13:25:00,129 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 332 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 13:25:00,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 236 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 13:25:00,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9408 states. [2022-07-23 13:25:00,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9408 to 8866. [2022-07-23 13:25:00,783 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) [2022-07-23 13:25:00,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8866 states to 8866 states and 13933 transitions. [2022-07-23 13:25:00,817 INFO L78 Accepts]: Start accepts. Automaton has 8866 states and 13933 transitions. Word has length 69 [2022-07-23 13:25:00,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:25:00,818 INFO L495 AbstractCegarLoop]: Abstraction has 8866 states and 13933 transitions. [2022-07-23 13:25:00,818 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) [2022-07-23 13:25:00,818 INFO L276 IsEmpty]: Start isEmpty. Operand 8866 states and 13933 transitions. [2022-07-23 13:25:00,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-23 13:25:00,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:25:00,822 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] [2022-07-23 13:25:00,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-23 13:25:01,047 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 [2022-07-23 13:25:01,047 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:25:01,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:25:01,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1597804450, now seen corresponding path program 2 times [2022-07-23 13:25:01,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:25:01,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200150285] [2022-07-23 13:25:01,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:25:01,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:25:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:01,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-23 13:25:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:01,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-23 13:25:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:01,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 13:25:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:01,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 13:25:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:01,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-23 13:25:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:01,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-23 13:25:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:01,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-23 13:25:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-23 13:25:01,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:25:01,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200150285] [2022-07-23 13:25:01,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200150285] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:25:01,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524324232] [2022-07-23 13:25:01,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 13:25:01,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:25:01,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:25:01,145 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) [2022-07-23 13:25:01,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-23 13:25:01,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 13:25:01,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:25:01,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 13:25:01,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:25:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 100 proven. 15 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-23 13:25:01,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:25:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 100 proven. 26 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-23 13:25:01,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524324232] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:25:01,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:25:01,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2022-07-23 13:25:01,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900310968] [2022-07-23 13:25:01,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:25:01,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 13:25:01,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:25:01,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 13:25:01,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-07-23 13:25:01,642 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) [2022-07-23 13:25:02,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:25:02,238 INFO L93 Difference]: Finished difference Result 17989 states and 31874 transitions. [2022-07-23 13:25:02,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 13:25:02,239 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 [2022-07-23 13:25:02,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:25:02,285 INFO L225 Difference]: With dead ends: 17989 [2022-07-23 13:25:02,285 INFO L226 Difference]: Without dead ends: 9810 [2022-07-23 13:25:02,335 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 [2022-07-23 13:25:02,336 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 73 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:25:02,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 89 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 13:25:02,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2022-07-23 13:25:03,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 8860. [2022-07-23 13:25:03,171 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) [2022-07-23 13:25:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8860 states to 8860 states and 13847 transitions. [2022-07-23 13:25:03,210 INFO L78 Accepts]: Start accepts. Automaton has 8860 states and 13847 transitions. Word has length 88 [2022-07-23 13:25:03,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:25:03,211 INFO L495 AbstractCegarLoop]: Abstraction has 8860 states and 13847 transitions. [2022-07-23 13:25:03,211 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) [2022-07-23 13:25:03,211 INFO L276 IsEmpty]: Start isEmpty. Operand 8860 states and 13847 transitions. [2022-07-23 13:25:03,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-23 13:25:03,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:25:03,216 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] [2022-07-23 13:25:03,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-23 13:25:03,444 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 [2022-07-23 13:25:03,444 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:25:03,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:25:03,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1897499616, now seen corresponding path program 3 times [2022-07-23 13:25:03,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:25:03,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182024101] [2022-07-23 13:25:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:25:03,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:25:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:03,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 13:25:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:03,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 13:25:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:03,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 13:25:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:03,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-23 13:25:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:03,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 13:25:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:03,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-23 13:25:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:03,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-23 13:25:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:03,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-23 13:25:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:03,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-23 13:25:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 113 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-23 13:25:03,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:25:03,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182024101] [2022-07-23 13:25:03,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182024101] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:25:03,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84959532] [2022-07-23 13:25:03,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 13:25:03,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:25:03,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:25:03,609 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) [2022-07-23 13:25:03,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-23 13:25:03,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-23 13:25:03,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:25:03,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 13:25:03,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:25:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 150 proven. 26 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-23 13:25:03,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:25:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 119 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-23 13:25:04,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84959532] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:25:04,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:25:04,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2022-07-23 13:25:04,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543593125] [2022-07-23 13:25:04,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:25:04,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-23 13:25:04,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:25:04,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-23 13:25:04,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-07-23 13:25:04,507 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) [2022-07-23 13:25:05,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:25:05,739 INFO L93 Difference]: Finished difference Result 20507 states and 41561 transitions. [2022-07-23 13:25:05,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 13:25:05,739 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 [2022-07-23 13:25:05,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:25:05,807 INFO L225 Difference]: With dead ends: 20507 [2022-07-23 13:25:05,807 INFO L226 Difference]: Without dead ends: 12363 [2022-07-23 13:25:05,870 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 [2022-07-23 13:25:05,870 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 89 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:25:05,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 153 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 13:25:05,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12363 states. [2022-07-23 13:25:06,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12363 to 11997. [2022-07-23 13:25:06,880 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) [2022-07-23 13:25:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11997 states to 11997 states and 19076 transitions. [2022-07-23 13:25:06,945 INFO L78 Accepts]: Start accepts. Automaton has 11997 states and 19076 transitions. Word has length 99 [2022-07-23 13:25:06,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:25:06,946 INFO L495 AbstractCegarLoop]: Abstraction has 11997 states and 19076 transitions. [2022-07-23 13:25:06,946 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) [2022-07-23 13:25:06,946 INFO L276 IsEmpty]: Start isEmpty. Operand 11997 states and 19076 transitions. [2022-07-23 13:25:06,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-23 13:25:06,952 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:25:06,952 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] [2022-07-23 13:25:06,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-23 13:25:07,153 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 [2022-07-23 13:25:07,153 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:25:07,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:25:07,154 INFO L85 PathProgramCache]: Analyzing trace with hash -127918165, now seen corresponding path program 3 times [2022-07-23 13:25:07,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:25:07,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031378850] [2022-07-23 13:25:07,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:25:07,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:25:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:07,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 13:25:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:07,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 13:25:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:07,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-23 13:25:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:07,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-23 13:25:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 122 proven. 90 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-23 13:25:07,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:25:07,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031378850] [2022-07-23 13:25:07,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031378850] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:25:07,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813158998] [2022-07-23 13:25:07,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 13:25:07,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:25:07,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:25:07,390 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) [2022-07-23 13:25:07,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-23 13:25:07,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-23 13:25:07,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:25:07,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-23 13:25:07,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:25:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 119 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-23 13:25:07,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:25:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-23 13:25:07,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813158998] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:25:07,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:25:07,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2022-07-23 13:25:07,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828601416] [2022-07-23 13:25:07,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:25:07,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-23 13:25:07,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:25:07,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-23 13:25:07,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-07-23 13:25:07,820 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) [2022-07-23 13:25:09,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:25:09,921 INFO L93 Difference]: Finished difference Result 20852 states and 35642 transitions. [2022-07-23 13:25:09,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-23 13:25:09,921 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 [2022-07-23 13:25:09,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:25:09,977 INFO L225 Difference]: With dead ends: 20852 [2022-07-23 13:25:09,977 INFO L226 Difference]: Without dead ends: 10359 [2022-07-23 13:25:10,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 180 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2022-07-23 13:25:10,055 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 220 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 13:25:10,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 136 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 13:25:10,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2022-07-23 13:25:10,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 8741. [2022-07-23 13:25:10,804 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) [2022-07-23 13:25:10,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 12053 transitions. [2022-07-23 13:25:10,832 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 12053 transitions. Word has length 88 [2022-07-23 13:25:10,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:25:10,832 INFO L495 AbstractCegarLoop]: Abstraction has 8741 states and 12053 transitions. [2022-07-23 13:25:10,832 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) [2022-07-23 13:25:10,832 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 12053 transitions. [2022-07-23 13:25:10,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-23 13:25:10,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:25:10,836 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] [2022-07-23 13:25:10,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-23 13:25:11,046 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 [2022-07-23 13:25:11,046 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:25:11,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:25:11,047 INFO L85 PathProgramCache]: Analyzing trace with hash -635779733, now seen corresponding path program 4 times [2022-07-23 13:25:11,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:25:11,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866379815] [2022-07-23 13:25:11,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:25:11,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:25:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:11,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 13:25:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:11,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 13:25:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:11,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 13:25:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:11,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 13:25:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:11,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-23 13:25:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:11,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-23 13:25:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:11,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-23 13:25:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:11,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-23 13:25:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-23 13:25:11,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:25:11,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866379815] [2022-07-23 13:25:11,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866379815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:25:11,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027148866] [2022-07-23 13:25:11,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 13:25:11,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:25:11,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:25:11,298 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) [2022-07-23 13:25:11,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-23 13:25:11,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 13:25:11,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:25:11,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-23 13:25:11,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:25:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-23 13:25:11,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:25:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 42 proven. 89 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-23 13:25:12,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027148866] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:25:12,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:25:12,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2022-07-23 13:25:12,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772101611] [2022-07-23 13:25:12,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:25:12,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-23 13:25:12,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:25:12,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-23 13:25:12,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2022-07-23 13:25:12,697 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) [2022-07-23 13:25:17,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:25:17,086 INFO L93 Difference]: Finished difference Result 29169 states and 46148 transitions. [2022-07-23 13:25:17,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-07-23 13:25:17,087 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 [2022-07-23 13:25:17,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:25:17,239 INFO L225 Difference]: With dead ends: 29169 [2022-07-23 13:25:17,239 INFO L226 Difference]: Without dead ends: 28067 [2022-07-23 13:25:17,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12279 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2022-07-23 13:25:17,277 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 231 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 1127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 2302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1127 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-23 13:25:17,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 280 Invalid, 2302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1127 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-23 13:25:17,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28067 states. [2022-07-23 13:25:18,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28067 to 17311. [2022-07-23 13:25:18,825 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) [2022-07-23 13:25:18,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17311 states to 17311 states and 26931 transitions. [2022-07-23 13:25:18,890 INFO L78 Accepts]: Start accepts. Automaton has 17311 states and 26931 transitions. Word has length 90 [2022-07-23 13:25:18,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:25:18,890 INFO L495 AbstractCegarLoop]: Abstraction has 17311 states and 26931 transitions. [2022-07-23 13:25:18,891 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) [2022-07-23 13:25:18,891 INFO L276 IsEmpty]: Start isEmpty. Operand 17311 states and 26931 transitions. [2022-07-23 13:25:18,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-23 13:25:18,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:25:18,894 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2022-07-23 13:25:18,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-23 13:25:19,118 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 [2022-07-23 13:25:19,119 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:25:19,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:25:19,119 INFO L85 PathProgramCache]: Analyzing trace with hash 147414137, now seen corresponding path program 3 times [2022-07-23 13:25:19,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:25:19,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394906597] [2022-07-23 13:25:19,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:25:19,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:25:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:25:19,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:25:19,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394906597] [2022-07-23 13:25:19,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394906597] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:25:19,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914434963] [2022-07-23 13:25:19,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 13:25:19,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:25:19,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:25:19,373 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) [2022-07-23 13:25:19,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-23 13:25:19,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-23 13:25:19,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:25:19,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-23 13:25:19,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:25:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:25:19,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:25:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:25:20,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914434963] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:25:20,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:25:20,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-07-23 13:25:20,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031880877] [2022-07-23 13:25:20,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:25:20,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-23 13:25:20,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:25:20,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-23 13:25:20,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-07-23 13:25:20,060 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) [2022-07-23 13:25:22,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:25:22,858 INFO L93 Difference]: Finished difference Result 28628 states and 44547 transitions. [2022-07-23 13:25:22,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-23 13:25:22,859 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 [2022-07-23 13:25:22,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:25:23,040 INFO L225 Difference]: With dead ends: 28628 [2022-07-23 13:25:23,040 INFO L226 Difference]: Without dead ends: 28627 [2022-07-23 13:25:23,052 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 [2022-07-23 13:25:23,053 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 968 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 13:25:23,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 731 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [546 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 13:25:23,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28627 states. [2022-07-23 13:25:25,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28627 to 28627. [2022-07-23 13:25:25,066 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) [2022-07-23 13:25:25,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28627 states to 28627 states and 44535 transitions. [2022-07-23 13:25:25,167 INFO L78 Accepts]: Start accepts. Automaton has 28627 states and 44535 transitions. Word has length 92 [2022-07-23 13:25:25,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:25:25,167 INFO L495 AbstractCegarLoop]: Abstraction has 28627 states and 44535 transitions. [2022-07-23 13:25:25,167 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) [2022-07-23 13:25:25,168 INFO L276 IsEmpty]: Start isEmpty. Operand 28627 states and 44535 transitions. [2022-07-23 13:25:25,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-23 13:25:25,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:25:25,177 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2022-07-23 13:25:25,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-23 13:25:25,378 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 [2022-07-23 13:25:25,378 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:25:25,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:25:25,378 INFO L85 PathProgramCache]: Analyzing trace with hash -570444405, now seen corresponding path program 2 times [2022-07-23 13:25:25,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:25:25,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112791640] [2022-07-23 13:25:25,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:25:25,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:25:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-23 13:25:25,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:25:25,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112791640] [2022-07-23 13:25:25,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112791640] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:25:25,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711287202] [2022-07-23 13:25:25,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 13:25:25,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:25:25,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:25:25,618 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) [2022-07-23 13:25:25,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-23 13:25:25,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 13:25:25,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:25:25,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-23 13:25:25,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:25:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-23 13:25:25,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:25:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-23 13:25:26,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711287202] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:25:26,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:25:26,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-07-23 13:25:26,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326616686] [2022-07-23 13:25:26,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:25:26,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-23 13:25:26,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:25:26,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-23 13:25:26,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-07-23 13:25:26,366 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) [2022-07-23 13:25:31,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:25:31,670 INFO L93 Difference]: Finished difference Result 64728 states and 101341 transitions. [2022-07-23 13:25:31,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-23 13:25:31,671 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 [2022-07-23 13:25:31,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:25:31,913 INFO L225 Difference]: With dead ends: 64728 [2022-07-23 13:25:31,914 INFO L226 Difference]: Without dead ends: 64727 [2022-07-23 13:25:31,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2022-07-23 13:25:31,944 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2480 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2483 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 13:25:31,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2483 Valid, 548 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-23 13:25:31,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64727 states. [2022-07-23 13:25:36,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64727 to 64675. [2022-07-23 13:25:36,993 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) [2022-07-23 13:25:37,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64675 states to 64675 states and 101319 transitions. [2022-07-23 13:25:37,237 INFO L78 Accepts]: Start accepts. Automaton has 64675 states and 101319 transitions. Word has length 142 [2022-07-23 13:25:37,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:25:37,238 INFO L495 AbstractCegarLoop]: Abstraction has 64675 states and 101319 transitions. [2022-07-23 13:25:37,238 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) [2022-07-23 13:25:37,238 INFO L276 IsEmpty]: Start isEmpty. Operand 64675 states and 101319 transitions. [2022-07-23 13:25:37,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-07-23 13:25:37,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:25:37,253 INFO L195 NwaCegarLoop]: trace histogram [24, 17, 17, 13, 13, 13, 12, 12, 12, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-23 13:25:37,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-23 13:25:37,453 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 [2022-07-23 13:25:37,454 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-23 13:25:37,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:25:37,454 INFO L85 PathProgramCache]: Analyzing trace with hash -672881287, now seen corresponding path program 1 times [2022-07-23 13:25:37,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:25:37,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502088803] [2022-07-23 13:25:37,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:25:37,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:25:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:37,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-23 13:25:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:37,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-23 13:25:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:37,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 13:25:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:37,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-23 13:25:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:37,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 13:25:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:37,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-23 13:25:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:37,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-23 13:25:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:37,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-23 13:25:37,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:37,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 13:25:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:37,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 13:25:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:37,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 13:25:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:37,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 13:25:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:37,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-23 13:25:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:37,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-23 13:25:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:37,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-23 13:25:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:37,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-23 13:25:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:37,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-23 13:25:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 559 proven. 214 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-07-23 13:25:37,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:25:37,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502088803] [2022-07-23 13:25:37,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502088803] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:25:37,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917916731] [2022-07-23 13:25:37,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:25:37,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:25:37,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:25:37,786 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) [2022-07-23 13:25:37,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-23 13:25:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:37,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-23 13:25:37,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:25:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 547 proven. 216 refuted. 0 times theorem prover too weak. 686 trivial. 0 not checked. [2022-07-23 13:25:38,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:25:40,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 563 proven. 263 refuted. 0 times theorem prover too weak. 623 trivial. 0 not checked. [2022-07-23 13:25:40,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917916731] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:25:40,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:25:40,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 21] total 27 [2022-07-23 13:25:40,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64120072] [2022-07-23 13:25:40,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:25:40,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-23 13:25:40,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:25:40,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-23 13:25:40,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-07-23 13:25:40,144 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)